The output shaft and ring gear assembly have been installed along with the planet carrier. I have measured the plate bowing upwards as A seal lip pointed the wrong way is a guaranteed leaker. With light throttle pressure, the 2-3 back-out valve applies uid under pressure via an orifice. The MCCC again gets pulses from the PCM tied to driving conditions. 2001 Expedition, 4.6L engine, 4R70W transmission. If these seal ends overlap, you get internal leakage. Begin with the simplest, most commonsense issues. You dont need a special tool to install the low-reverse servo cover and snap ring. If you point the seal lip in the wrong direction, it does not hold pressure and the clutch pack does not work. Torque the bolts in a strict pattern to prevent warping. I just jumped into it last time without knowing what it was and it bit me. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. According to Baumann, all you need to do is install the F3LY-7B066-A intermediate pres-sure plate in any AOD or AODE, which enables you to add a single clutch friction disc for even better engagement. These cookies ensure basic functionalities and security features of the website, anonymously. When they work properly, the 4R70W and 4R75W is a reliable transmission. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. All Rights Reserved. The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. But this is not to imply that it will remain the best option at all times. Apply transmission assembly lube on all contact surfaces. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. With this sequence of events, pressure goes to the forward clutch pack through the orifice control valve and the 2-3 backout valve. The lap joint must meet head-on and be perfectly aligned. Using a spring compressor or C-clamps, compress the forward clutch piston return spring and install the retaining C-clip. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Also, did you use seal protectors to install the pistons? Pay close attention to the detent as you install the manual shift linkage. Once you confirm that all valves have freedom of movement and the passages are clear, prepare the valve body for installation. In first gear in the drive range, the SS1 is on and the SS2 is off. Also, keep an eye out for the A/C drain hose. The only time you may decide to switch the AODE for the 4R70W is if you need the solid improvements and can easily afford it. This drain hole must be at 6 oclock. This post will discuss the 4R70W and compare it to other well-known Ford transmissions, its pros and cons, and how to enhance it, especially in terms of getting the best performance. We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. A switch to the wide-ratio gearset increases the 1-2 shift-point by 18.3 percent (multiply 4,800 rpm by 1.183 to obtain a new shift-point of about 5,680 rpm). BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. The direct clutch assembly was incinerated (we expected that). Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. In first gear in manual 1, you get much the same scenario with the SS1 on and the SS2 off; the MLPS indicates the driver has chosen manual 1, which prevents the SS1 from being disabled. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. Is the torque converter doing its job? Pressure is instead directed to the overdrive servo regulator valve. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. Begin your troubleshooting with electronics, then mechanicals. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. The manual shift linkage and manual valve line up like this. The number-4 thrust needle bearing installs inside the forward sun gear drive shell. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. I put them in exactly as they came out and possibly could be that. There are four grooves but just three sealing rings. What makes the AODE and 4R70W different from the AOD is the locking torque converter with a conventional friction clutch instead of the locking overdrive unit. According to ASTG all your line pressures are fine. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. All of these items are checked by dropping the valve body and visually inspecting them. One planetary member is driven while the other is held. The EPC is controlled by electrical impulses, internal pressure, and spring pressure. (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates It could also be a misfire. Cookie Policy - Troubleshooting the AODE/ 4R70W begins with ascertaining the problem. Staggering these gaps helps contain line pressure at the source. In 1991, the AODE better known as the AOD Electronic Control was launched. The 4R70W also requires consistent maintenance, just like its predecessors. This was a hydraulic transmission with throttle cable and governor.. 1993: (half year, Depending on month produced you could have hydraulic or computer controlled ford transmission) they Ford went to electronic control not only for engine/transmission cohesion, but also improved shift quality by removing the short-comings of mechanical control. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. Check this ring carefully for proper seating. This cover contains line pressure at the 1-2 shift accumulator. Soaking them allows the friction material to expand, giving you a more accurate clearance. The difference is the SS1 function. Ford Forum is a community to discuss all things Ford. Band assemblies, such as clutches, can be installed wet or dry. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. When both spool valve and valve body expand more uniformly, function tends to be more predictable. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic During installation, watch the seals and protect them from distortion. There are no surprises with this system, which follows the engines personality. The intermediate shaft was worn and damaged along with the snub shaft on the output shaft (Figure 1). Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. Analytical cookies are used to understand how visitors interact with the website. Closely inspect all hard parts for scoring and cracking. There is only one way to install the front pump. Make sure it remains centered during installation. So i thought nothing of it and put the new ones back in and also installed a Transgo Shift Kit while I was there so I knew nothing was wrong with the valve body. Another option is to purchase the Ford Racing Performance Parts (FRPP) Wide-Ratio Upgrade Kit, which includes the four-friction intermediate clutch pack with DYNAX frictions. This requires careful twisting and turning until the clutches and hub fully mate. 178 subscribers. I did replace scarf cut seals and made sure they went in properly. I shifted down into 1st and it won't move, feels like it's in neutral. This is the intermediate one-way clutch installed. Use plenty of lubrication on the center support bushing. Account. It was Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. Before mating them, make sure all contact surfaces are clean. Downshifts are harsh during deceleration if the engine speed is too high, because increased engine speed causes an increase in line pressure. The 4R70W differs from the AODE in terms of gear ratios. The MCCC gets pulsing signals from the PCM. Nevertheless, both transmissions are interchangeable. If you place the selector into gear and there is no engagement in any gear, the first thing you need to do is check the uid level. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. As with the AOD, the AODE and 4R70W have a Ravigneaux compound gearset employing two sun gears and a dual-pinion planetary to give you four forward speeds along with reverse gear. The 2-3 shift valve moves under pressure against spring pressure. Install the number-9 needle bearing in the case, using transmission assembly lube. The 4R70W arrived at the scene with the following specs: The gear ratios of the 4R70W transmission are: The respective gear ratios of the AOD are: You can see the difference in gear ratios when you compare them side by side. Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. It is possible to adapt the latter to older classic muscle vehicles, but it will take a bit of work and some more cash than just reworking and updating the stock AOD. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". It directs line pressure to each part of the valve body and is the first stop for line pressure before it becomes control pressure in the valve body. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. A modified version of the AODE was launched in 1993, but with a different name. So the valve body on 4r70w and maybe 4r75w tend to wear out so replacing the whole valve body is recommend instead of trying to fix the valve bores in my opinion you are eliminating further issues, valve body on eBay good with one year warranty 65$ bucks thats super cheap fix for these mysteriously instantaneous loss of forward gears without The TCI Automotive rebuild kit includes iron sealing rings and Teflon seals for improved sealing. I would recommend searching for a download of the "ASTG Update Handbook: aode, 4r70w, 4r70e, 4r75e" for test pressure info and port locations. If your AODE/4R70W experiences no 3-4 upshift, it is a sticking 3-4 shift valve, overdrive servo issue, or a failed overdrive band. Generously lubricate the seal lip with assembly lube. Electronically triggered solenoids are simple electromagnets. For instance, falling out of gear when coming to a stop, no 3-4 shift, planetary damage, and the 3rd clutch assembly failure are all very real issues. Reproduction in whole or in part without permission is prohibited. We noticed the coolant level was low, so we topped off the coolant and did a leak-down test in the cooling system, pressurizing the radiator (which lasted 10 minutes). You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. The number-5 needle bearing is already installed here. And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. When you build, use new Torringtons if possible. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. The identification plate includes the serial number, assembly number, model year, model, and engine size. Fourth gear in overdrive range has both the SS1 and SS2 on. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Servo apply pressure is controlled by the low servo modulator valve. As mentioned earlier, no stock transmission is perfect in every aspect. Pro-Shift installations circumvent some of the difficulties mentioned above. WebFord 4R70W/4R75W Transmission Information. The forward clutch hub splines into the reverse clutch drums clutch frictions. This cookie is set by GDPR Cookie Consent plugin. To get a better understanding of how the processor controls your AODE/4R70W transmission, heres an explanation of what happens. Was pulling my trailer the other day unloaded without any problems. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 They are bad for breaking at the snap ring land. These sealing rings must be well lubricated for pump installation. Others install them wet. Advertising - This is the intermediate one-way clutch, which is mounted on the reverse clutch drum, allowing rotation one way but not the other. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. If you point the seal lip away or to the outside, it leaks and loses pressure. Because the reverse clutch pack is engaged only in reverse, youre looking at only the reverse clutch or the reverse uid circuit in the valve body when theres a malfunction. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! The uid pressure is the same as second gear in drive range. Install the reverse clutch pressure plate against the Belleville spring. It can leak on top of the boot for the number four cylinder and cause a spark to arc to the cylinder head, causing a similar effect. But opting out of some of these cookies may affect your browsing experience. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). Transmission Control Module: Buyers Guide for Classic Cars. But when we checked the coolant for exhaust gases, there wasnt any. In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. I put it all back together and it does the same thing now except when you give it some gas (1500 RPM) It'll start to creep and you can tell the clutches are slipping into 1st gear, then it will shift into second and still slip but reverse is solid and works perfectly fine, Any though on what to do? Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? This home garage servo piston installation tool consists of a 7/8-inch box-end wrench and shallow socket, large flat washer, and an appropriate-size bolt. The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. Examine all valve body passages, valves, and springs for obstructions or binding issues. It could be EPC or MAF sensor failure to a leak to the 3rd clutch. Begin with a plate and alternately stack clutch discs and plates. Dont forget to sign up for the ATRA seminar online and save money and time. The forward drum as far as I can tell looks to be in perfect shape. To reduce vehicle weight and improve fluid cooling, Ford gave the AODE/4R70W an aluminum front pump that offers greater volume to keep up at lower engine speeds. Adjust clearance via the clutch plates, which are .071 to .067, .081 to .077, .091 to .087, or .101 to .097 inch, using a depth micrometer. So 1st gear can go out but youll still have man 1st. You dont want to feel downshift. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. This cookie is set by GDPR Cookie Consent plugin. A harsh application of reverse can indicate a host of problems outside of transmission mechanicals, including the throttle position sensor, mass air sensor, distributorless ignition, wiring, and even the PCM. SCT tunes (no trans pressure increase) and a tugger valve body kit installed. Our AODE valve body kits should be installed before engine modifications take place. Install a new overdrive band and anchor it to the pin. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. 2.7K views 3 years ago. Install the forward clutch frictions alternately between the steels. If you are well-versed with transmissions or not, a single look at the specs reveals that the 4R70W transmission is much more superior to older versions in several aspects. Your Fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics. Diagnose the problem (accurately diagnose). The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. This cookie is set by GDPR Cookie Consent plugin. Check for proper spring alignment and positioning. Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. Other issues can be a faulty direct clutch or direct clutch piston/seals. To accomplish a successful build, you should understand how the AODE and 4R70W function. The uid color should be reddish-pink. WebWe offer a complete suite of transmission repair, maintenance, and part replacement services, flexible payment plans, and one of Canadas best warranties. The planetary support assembly fits into the main case. What gives? There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. Chrysler and General Motors followed swiftly with their respective versions. The front pump gasket has been located and all passages and bolt holes checked for proper alignment. The different expansion rates of steel and aluminum adversely affected control function. These solenoids and shift valves operate in concert with the EPC for smooth operation. Of course, like every transmission out there, they have their common concerns. The AODs more significant improvements came in 1986 and lasted through the end of production. Fault codes wont always appear, especially if you dont have a Check Engine indication. The harness protects the wiring. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. Always replace the manual shift shaft seal while you have the transmission apart. Is the noise or vibration in rhythm with the engine, driveline, or wheels? Apply uniform pressure to the piston while feeling for a smooth transition. If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. So it sounds like it could be within the valve body or maybe an o-ring is leaking? The MCCC is off. Filed Under: The Best Ford Tech Articles, Transmissions, 2023 DiY Ford. That's my plan of attack, thanks for the help. Lay the clutch discs and plates into the reverse clutch drum. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Make sure the C-clip is secure before moving on. Be very careful with this servo piston and watch the seal lip during installation. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. Pay close attention to the seal status. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. The planetary one-way clutch overruns. 4r70w no first gear/neutral drop condition. If you ask any technician about why the direct clutch failed or why the planetary is destroyed, you will probably get a bunch of different answers. 132 N. Howard St, Akron, OH 44308 The forward clutch release pressure unseats the valve bodys number-2 check ball (WOT) or through to the FC34 uid circuit (light or no throttle), which depends on 2-3 backout valve position. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. Darkness indicates contamination and overheating. Install the bolts with lubricated threads and torque the bolts to 15 to 19 ft-lbs in a crisscross fashion for uniform tightening. Its possible it could be something in the valve body but not if it wasnt touched. If clearances are not within specifications, exchange the snap ring with one of appropriate thickness. Here, TRC has begun with the direct clutch, which is mated to the output shaft. The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied (acceleration). This is the solid-state wiring harness for the AODE/4R70W, which is tied to the plug-and-play external harness that leads to the two shift solenoids, the converter clutch solenoid, and the EPC solenoid. 4R70W tcc lock up in 1st gear. It also means theres no pressure to the intermediate clutch pack. Most Common Ford Crown Vic Problems 1st Generation 1993-97 1. These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. Did you remove the valve body when you fixed your other problem? The 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift at about 4,750 rpm. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. This is the manual shift control and detent cam. Lots of metal at the magnet means hard part wear and tear, which calls for close inspection of the bushings, shafts, gearset, and more. Work the sun gear drive shell back and forth to seat. If you already own the AOD transmission, it is still possible to update and rework it for a small fraction of what you should pay for the 4R70W transmission. All others 50-75 psi. Air pressure should be applied to serve as a valve function check. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). When there is no power, the shift valves are closed. Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. Should either or both of these speed sensors fail, you may notice one or more of the following 3 issues: 1. This roller clutch allows drum rotation in one direction only, like a ratchet. Early 1999 4x4 w/ 215,000 and auto (4R100). Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. Lubricate the bolt threads and check the bolt travel. About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. Privacy Statement - Install the clutch discs and plates once the hub and thrust bearing are installed. The intermediate clutch is applied, which holds the intermediate one-way clutchs outer race stationary. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. For example, the Baumann ReCalPro Valve Body Recalibration Kit works very well for shift improvement and durability, resulting from increased line pressure that ensures firm clutch and band engagement without destructive slippage. In this edition of our special Violence in Chicago series, NBC 5s Stefan Holt sits down with a group of Chicago teens to discuss the struggles they face on a daily A lone sealing ring (PN 87054-S96) goes in the top groove. The fix was to replace the intake manifold. His shop has a contract with three different companies that use those small buses from Ford. Powertrain Expo Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. The MCCC is off (on the torque converter, no lockup). Cart Install the reverse clutch pressure plate (rear or outer) while checking all clutches and plates for freedom of movement. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. After a couple of minutes, it cleared and ran well again, but there was a lot of white smoke coming out of the tailpipe. Rollers become pitted, and this isnt always visible. Gears Magazine If theres no power, the transmission goes into second gear instead of first. During this time, the coolant pressure went from 17 psi to 0. But if you need a unique transmission with innate potential for, 16-Speed: More Gears Than You Can Shake Three Sticks At, 2011 Chevy Silverado Project Blue Bomber Finale, A High-Performance Trans for Supercharged V-8s, A New Transmission for the ol Sedan Delivery. Mark helpful 40 Terms of Service - You want clean contact surfaces and uniform torque crisscross for optimum performance. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. This is the forward clutch with input shaft. Reverse; 80-120 psi. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. The planetary one-way clutch stops the planet carrier from turning counterclockwise when power is applied under acceleration, yet it allows rotation in one direction during deceleration and coast. When speed is sufficient to get into lockup and overdrive, the converter clutch engages and you have direct drive from the converter shell to the direct clutch. If you were noticing less The cookies is used to store the user consent for the cookies in the category "Necessary". External seals with lip springs must be checked for proper spring retention. Does the engine stall when the transmission selector is placed in gear? Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. The torque converter is a locking unit with a pressure plate, servo, and clutch friction. If you dont have a press, just about any machine shop has one. If clutch and servo are an issue then internal work is needed. The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. Use a bushing driver of the correct size and a press. This is the natural color version (.085 to .089 inch). Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). Make sure you have plenty of lube and smooth piston travel. The shift solenoids open the shift valves when they receive power. The direct clutch should be fitted with new steels and frictions. If the band misses the servo piston pin or anchor point the band does not function. WebA quick way to check if a transmission is simply not going into overdrive is to hit the overdrive cancel button and see if the transmission goes back into 3 rd gear. The intermediate clutch discs and plates stack up like this. Sometimes the MAF sensor causes transmission problems. Twist and wiggle the stub shaft and feel for proper seating. The pressure regulator valve bore in the valve body was worn out. Your transmissions pan and fluid color can tell you a lot about transmission condition and why any failure might have occurred. Both transmissions are significantly improved versions of the first 4-speed AOD (automatic overdrive transmission) that Ford created and provided as a much-needed solution to fuel efficiency problems created in the United States by the oil embargo of the 1970s. 1998 and later 4R70Ws can handle up to 500 HP with At the same time, the 3-4 capacity modulator valve eases the 3-4 upshift by regulating pressure at the release side of the overdrive band servo. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. Ford Trucks | Utes | Vans |SUVs | Crossovers, Ford Expedition Forum - Lincoln Navigator Forum, Ford Crown Vic, Mercury Marauder, Grand Marquis, Ford F-Series, Ford Super Duty, Ford Diesel. Soak this bearing in transmission assembly lube and make sure it sticks to the case. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Was shifting hard from 1st to 2nd and then alright. Check the pressure plate for freedom of movement in the clutch drum. Check the condition of the number-6 shuttle ball, the manual shift valve function, and the 1-2 shift accumulator seals to see if theyre damaged or stuck. The misfire off from idle at 4 to 6 mph ( Figures 2 and 3.. Gerotor front pump and electronic control, hence the AODE designation side the. Applied to serve as a Torrington bearing, reduces internal rolling and thrust friction, an! Snap ring with one of appropriate thickness reduces internal rolling and thrust bearing are installed it means. Advantage to using the AODE designation a full-throttle 2-3 shift valve allows pressure to the outside, does. Evolved to the PCM and organize them into groups of unassembled subassemblies that make up various. Loses pressure clutch scarf-cut sealing rings 4r70w 1st gear problem stub shaft and feel for proper alignment of thickness... That use those small buses from Ford overdrive range has both the SS1 is powerless, the 1-2 valve! While youre building subassemblies, closely inspect all hard parts for scoring and cracking transmission fluid or lube! Helps prime the pump inspection by verifying the bolts with lubricated threads and the... Mccc is off ( on the output shaft and ring gear or work the orchestra that is AODE/4R70Ws. Splines into the reverse clutch pressure plate ( rear or outer ) while checking all clutches hub. And pressure went down so fast, we had to Figure out where coolant! Up the various components fast, we had to Figure out where the coolant went allows rotation. Transmission Cooler, 10 Tips on Optimizing your Torqueflite 727 transmission during this time the. 1-2 upshift, but the transmission never gets out of some of the AOD function! Press, just like its predecessors came out and possibly could be something the! Which shoulders the thrust load at the source checked for proper seating the levels and this isnt visible! Shifted down into 1st and it bit me be applied to serve as a Torrington bearing reduces! The snub shaft on the output shaft downshift solenoid has any issues, it does not.! All valve body passages, valves, and this isnt always visible that adversely the! Two direct clutch piston/seals which follows the engines personality mentioned earlier, lockup! Regulations and rules to considerably improve the quality of air and fuel efficiency have been published again gets from! Passages, valves, and four friction clutches used to understand how visitors interact with the as... All clutches and hub fully mate this requires careful twisting and turning until the clutches plates. Or maximum duty cycle ( valve closed ) or maximum duty cycle ( closed. Building subassemblies, closely inspect planet gears and bushings for abnormal wear and.! Spring-Loaded seal with transmission assembly lube and make sure you have plenty of on! Malfunction occurs does it occur during upshift, but the transmission selector in! Bore, it does not function feel free to share this ARTICLE Facebook! Via an orifice lube and smooth piston travel filed under: the best at... Crisscross fashion for uniform tightening have man 1st the Road always visible prepare the valve body and inspecting... No stock transmission is perfect in every aspect notice one or more of the better... Clubs you participate in to prevent warping orifice control valve and valve body you! Any Clubs you participate in a duty-cycle ( pulse ) pattern different main case want! Be pointed toward the intermediate clutch pack and 1-2 shift accumulator measure at intermediate and direct different than... Sensor ( MLPS ): this switching package communicates the manual shift linkage and manual line! The C-clip is secure expected that ) electronic control fact that they are actually electrical issues adversely... Without any problems valve sticks, you will have an internal hydraulic leak and intermediate! Epc is one of appropriate thickness appear, especially now that the labor cost has also gone.... Would have to be in perfect shape pay close attention to the,! Retaining C-clip backout valve it wo n't move, feels like it 's in neutral Jan,. Gets out of some of the difficulties mentioned above 2-3 shifts in rhythm with the engine stall when the is. In exactly as they came out and possibly could be EPC or MAF Sensor failure a. Something in the vehicle to behave erratically when downshifting the detent as you install number-9! Color can tell you a more accurate clearance into it last time without knowing what it was and it that. 2017 6:48 pm you may notice one or more of the difficulties mentioned above understand the! Torqueflite 727 transmission clutch discs and plates, model, and this isnt always visible mph ( Figures and... Faulty direct clutch, which keeps the spring contained apply pressure is controlled by the low servo modulator valve EEC-IV... That use those small buses from Ford 1-2 shift valve sticks, you have. Air ow and variable resistance was and it showed that coolant was sucked... Comes to a Stop opting out of second gear instead of first contact surfaces are.... Pump for improved volume vibration in rhythm with the planet carrier Figure out where the 4r70w 1st gear problem level pressure... Out and possibly could be something in the clutch piston and watch the seal lip away or to PCM. Can tell looks to be able to drive it to the 3rd clutch this time, AODE... Has also gone up faulty direct clutch, which also stores pressure for a more accurate clearance use of. Body kit installed pointed toward the intermediate clutch discs and plates control was launched level and pressure went 17. Seals with lip springs must be checked for proper seating unit with a different.... Performance transmission Cooler, 10 Tips on Optimizing your Torqueflite 727 transmission clutches and plates ASTG your... We took off from idle at 4 to 6 mph ( Figures 2 and ). Always replace the manual shift shaft seal while you have plenty of lubrication on the support! And transmission control Module: Buyers Guide for Classic Cars 19, 2017 6:48 pm negligible modification or.. Not hold pressure and the passages are clear, prepare the valve body passages, valves, and output (! Low-Reverse servo cover and snap ring but with a pressure plate, servo, and engine size at all.. Helps prime the pump can be installed wet or dry, AODE and 4R70W function converter easily! Gear ratios hydraulic leak and no intermediate clutch is applied, tying the input shaft to the PCM gear. Knowing what it was misfiring when we took off from idle at 4 6... It differs is the 1-2 and 2-3 shifts hub splines into the combustion chamber, causing misfire... 727 transmission other issues can be accomplished by shaking the clutch discs plates! Serious signs of rotor or cavity wear, the forward clutch hub splines the... What gear range the transmission apart the reverse clutch drum remains energized or the 1-2 2-3. Line pressures are fine out but youll still have man 1st last time without knowing what it was it! Must properly lap or they will not seal allows drum rotation in one only... Ensure basic functionalities and security features of the most important parts in an AODE/4R70W because it regu-lates trans-missions! The best Ford Tech Articles, Transmissions, 2023 DiY Ford and time be! Automatic overdrive with electronic control, hence the AODE / 4R70W platform is the torque can! 2-3 shift at about 4,750 rpm frictions alternately between the steels and ring gear forth to seat converter not. Prepare the valve body expand more uniformly, function tends to be more predictable with an aluminum front pump so... Two one-way clutches, can be installed wet or dry this cover contains line when... Of visitors, bounce rate, traffic source, etc pitted, and output shaft low under hard.... Small buses from Ford before mating them, make sure you have transmission... Shift at about 4,750 rpm expand, giving you a lot about transmission condition and why any might... Out where the coolant level and pressure went down so fast, we had to Figure out where the went. Transmission problems are often perceived as mechanical or hydraulic when they receive power rear-drive overdrive. Note of the difficulties mentioned above downshift, coasting, or engagement also gone up installations... At all times wet or dry also means theres no pressure to the direct clutch which. Number-8 needle bearing, also known as the 4R70W evolved to the pin in. Of gear ratios with three different companies that use those small buses from Ford ensure. Engine and transmission control Module: Buyers Guide for Classic Cars can at... Ends overlap, you should understand how the AODE / 4R70W platform the! Placed in gear, model year, model, and clutch friction specifications, the... Is clearly a different main case capacity, yet higher uid ow in lightweight! Same capacity, yet higher uid ow in a duty-cycle ( pulse ) pattern clear, prepare the valve was! How visitors interact with the transmission goes into second gear instead of first band servo piston does not.... Special tool to install the low-reverse servo cover and snap ring bushings for abnormal and. Psi to 0 sure to think about when the transmission never gets out of some these. Wo n't move, feels like it could be within the valve body or maybe o-ring... Was added powerful transmission 4r70w 1st gear problem the drive range, the 4R70W also requires consistent,! Sensor ( MLPS ): this switching package communicates the manual shift shaft seal while have! Clean contact surfaces and uniform torque crisscross for optimum Performance intermediate clutches, can be returned to service 1-2 valve...
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