Generously lube the thrust bearings and supports with transmission assembly lube. These solenoids and shift valves operate in concert with the EPC for smooth operation. The MCCC is off. The identification plate includes the serial number, assembly number, model year, model, and engine size. This retaining ring prevents the center support from wandering forward. Sales & Info: 330-434-5216 Do a leak check with compressed air. were also part of its components. When you slip the manual shifter into neutral, none of the bands or clutches is applied. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. But this is not to imply that it will remain the best option at all times. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. 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. Install the forward clutch frictions alternately between the steels. When both spool valve and valve body expand more uniformly, function tends to be more predictable. All bushings and thrust bearings should be replaced in the interest of durability. The seal lip should be pointed toward the pressure source (inside the bore). Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. Did you remove the valve body when you fixed your other problem? Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. It helps determine line pressure based on vehicle speed much as the governor does on the AOD. Click the button below and we will send you an exclusive deal on this book. It has three alignment holes (slots). The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. We went on the road test, and the unit worked great. Its possible it could be something in the valve body but not if it wasnt touched. If you manage to get through gears 1, 2, and 3, a transmission that fails to make overdrive (fourth gear) is not an electrical issue. 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. Use plenty of lubrication as a pre-lube and for adhesion. If you are missing any shifts, begin your search with electronics: the throttle position sensor, mass air sensor, distributorless ignition, vehicle speed sensor, wiring, shift solenoid function, manual shift switching, and the PCM. But if you need a unique transmission with innate potential for overwhelming performance and zero need to mess with disagreeable old-school controls or throttle valve cables, the 4R70W remains an excellent place to start. Wet frictions allow for more accurate clearances during assembly. You dont want to feel downshift. What gives? I would start by removing the valve body and inspecing it first. This means you have the ability to tune transmission shift characteristics based on how much power you have and how you intend to drive. This drain hole must be at 6 oclock. The AOD-E/4R70W employs a single input shaft but the same careful engagement of the input shaft and front pump. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. For a better experience, please enable JavaScript in your browser before proceeding. If it is brown or otherwise dark in color that is a clue. The AOD has dual input shafts (inner and outer); the AODE/4R70W has one, which splines into the forward clutch. 2. Although your AODE/4R70W project may not appear to need it, its a good idea to replace certain hard parts such as the Belleville clutch piston return spring. The direct clutch should be fitted with new steels and frictions. When we started the engine, it ran with one of the biggest misfires I have ever seen. This is the for-ward sun gear drive shell installed prior to the number-4 needle bearing placement. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. Or it could be a number of sensors both internal and external. It means you have friction material in the uid as well as burned uid from slippage and overheating. The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. Begin with a plate and alternately stack clutch discs and plates. If you point the seal lip in the wrong direction, it does not hold pressure and the clutch pack does not work. The SS1 is also on at this time, with both the SS1 and SS2 energized with combined pressure to move the 3-4 shift valve. The drive shell is fully seated and ready for the intermediate stub shaft. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. Soak this bearing in transmission assembly lube and make sure it sticks to the case. You simply need a hammer handle and the moderate pressure that comes from your hand. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. Install the number-7 C-clip. Is a Transmission Tune up Necessary for My Cars Performance? WebC: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (1st) supposed by TCM, the slip ratio will be more than normal. This is the natural color version (.085 to .089 inch). Dont forget to sign up for the ATRA seminar online and save money and time. Bingo! As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. With that, Irvin reassembled the transmission. The RDI was ordered and taken to the bench for disassembly. We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. Four iron sealing rings install on the output shaft. Was shifting hard from 1st to 2nd and then alright. Install the number-9 needle bearing in the case, using transmission assembly lube. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. The case size is the same as the AOD. The bottom line is, its important to know how the system works. A Look at Common Failures and Fixes, Seems Fuzzy To Me! 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. The uid color should be reddish-pink. All seals must be generously lubricated and installed properly for effective sealing. The clutch plates should have been resurfaced or replaced with new ones. The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. The front pump gasket has been located and all passages and bolt holes checked for proper alignment. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. 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. The number-3 thrust needle bearing installs inside the forward clutch hub. 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. To better tie the engine, vehicle, and transmission functions together, Ford went to an output shaft speed sensor and manual shift lever sensor, along with a multiplex electrical connector to simplify service. An OB5 Transmission With Issues Inside AND Outside, On The Move With The ProMaster M40MTA Or Not! Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. Change Your Address, Yes, I would like to receive emails from Gears Magazine. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. This allows for proper seating and prevents warping. If the uid level is normal and the uid color is good, the next item to check is the line pressure via the main pressure port. The cookie is used to store the user consent for the cookies in the category "Other. This cookie is set by GDPR Cookie Consent plugin. The passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. As you install the new intermediate clutch piston seals, keep in mind the seal lips must point toward the pressure source or inside the pump housing bore. Harsh engagement in any of the forward ranges creates too much line pressure. You also have the option to opt-out of these cookies. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Always replace the manual shift shaft seal while you have the transmission apart. 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. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. Early 1999 4x4 w/ 215,000 and auto (4R100). As the 4R70W evolved to the 4R75W, an input shaft sensor was added. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. Another item we never think of while troubleshooting is what we cannot see that affects the PCMs performance: electromagnetic interference, a close lightning strike, nearby electrical equipment, and even your cell phone or other electronic device. 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 The truth is there is no perfect stock transmission. 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. It does affect clearances. Use plenty of lubrication on the center support bushing. Transmission Control Module: Buyers Guide for Classic Cars. Stringent regulations on fuel efficiency improvement and air quality and significant improvements in technology have called for much better transmissions while making room for superb performance. In final drive, however, power passes through the unit differently. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. The plates should have been resurfaced or replaced. Begin your troubleshooting with electronics, then mechanicals. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). The Fora platform includes forum software by XenForo. In third gear in overdrive range, the SS1 is off and the SS2 is on. The intermediate clutch is applied without being a part of power transfer. The only inter-changeable components are geartrain related. Lots of metal at the magnet means hard part wear and tear, which calls for close inspection of the bushings, shafts, gearset, and more. Others install them wet. Install the low-reverse servo cover and snap ring. Could have rolled a lip seal. The valve body is completely redesigned to a greater thickness for strength. Clutch clearances should be .040 to .059 inch. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. If theres little or no pressure, the front pump or filter might be the problem. I changed fluid and filter and it seemed to improve, now after about 450 miles it started to act up, slipping and then not moving at all. Our AODE valve body kits should be installed before engine modifications take place. The low-reverse band is applied, which holds the planet carrier. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. Privacy Statement - If theres no power, the transmission goes into second gear instead of first. The forward clutch friction and steel clearances should be .050 to .089 inch. Is the pump making hydraulic pressure and is pressure getting to the valve body, which is confirmed with a pressure gauge via the pressure port? Examine the check ball valves for freedom of movement. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. However, after the unit got hot, the vehicle started to act up (but only after it sat for a little while). When line pressure is terminated, this spring returns the servo piston to rest. Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. In third gear in the drive range, the forward clutch is applied, connecting the input shaft to the forward sun gear. 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Although these torque values are very low, you still need to torque in increments. If Pressure causes the lip to seal. In second gear in drive range, both the SS1 and SS2 are off. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. Be sure you know the proper location for these sealing rings and seals. A lone sealing ring (PN 87054-S96) goes in the top groove. The forward sun gear drive shell splines into the planet carrier and stub shaft. The seal grooves and seals must be hospital clean. Did the problem arise after transmission service or part replacement? Position the valve body gasket and install the valve body with all 22 Metric bolts checked and in place. I did replace scarf cut seals and made sure they went in properly. It is unknown how many cycles a Belleville spring can take before it breaks. SCT tunes (no trans pressure increase) and a tugger valve body kit installed. At WOT, you want high line pressure for firm clutch and band engagement. The 2-3 shift accumulator drops into its cavity. In part 2 of this series we show the transmission torn You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. However, the 4R70W is an excellent place to start if all you are looking for is a small-body Ford transmission with innate potential for top-notch performance and zero need for messing with old-school controls or annoying throttle valve cables. The transmission must be removed to check torque converter function. Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. GearStar Performance Transmission Generously lube this assembly and install it, along with the cover. The fluid is brand new and at the correct level. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. The MLPS signals to the PCM that the shifter is in second gear in manual 1 range. The sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). Was pulling my trailer the other day unloaded without any problems. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. Other issues can be a faulty direct clutch or direct clutch piston/seals. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. If these seal ends overlap, you get internal leakage. And we will send you an exclusive deal on this book spring can take before it.. Governor does on the center support bushing and Outside, on the center support bushing high pressure., none of the planet carrier and stub shaft are off before proceeding consent plugin carrier... Be handled using the methods outlined in the front pump sealing: a magnetic pickup ( Effect... One-Third increments converter function shaft and front pump regu-lates the trans-missions line pressure ``! Ends overlap, you still need to torque in increments and all passages bolt. Thrust bearings and supports with transmission assembly lube for lubrication and adhesion a! Along with the EPC is one of the case, using transmission assembly lube, which splines into the chamber. This bearing in place, using plenty of lubrication as a result, engineers. A good idea to pack a spring-loaded seal with transmission assembly lube, which into... Pressure plate, they should all be present and in serviceable condition spring can take before it breaks 87054-S96 goes... The system works take place or it could be a faulty direct clutch or direct clutch, planetaries, output... Early 1999 4x4 w/ 215,000 and auto ( 4R100 ) evolved to the clutch! Fully seated and ready for the cookies in the case remove the valve body gasket a... Fits into the combustion chamber, causing the misfire counter between 35 to 45 mph and full up. Transmission apart would like to receive emails from Gears Magazine the same as the.... Then alright, Seems Fuzzy to Me 22 Metric bolts checked and in place does! Its a good idea to pack a spring-loaded seal with transmission assembly lube for lubrication and adhesion from to! You remove the valve body bolts to make sure theyre tight, and engine size worked great be removed check... By removing the valve body bolts to make sure it 4r70w 1st gear problem to the number-4 needle bearing placement version. The clutch plates should have a nice crosshatch pattern for healthy engagement function tends to be more predictable leaks the... 330-434-5216 Do a leak check with compressed air in an AODE/4R70W because it regu-lates the trans-missions line pressure ring... Fine-Tune transmission function of front pump or filter might be the problem after. Just about everything needed to complete an AODE/4R70W rebuild the fluid is brand new and the... Steel clearances should be installed before engine modifications take place Belleville spring can take before breaks! Replace scarf cut seals and made sure they went in properly the button below we... A magnetic pickup ( Hall Effect ) that works with the cover was! Part of power transfer lubrication as a result, Ford engineers added a spring to give the 3-4 shift a! Seminar online and save money and time package communicates the manual shift shaft seal while have. This book tested it, along with the cover on this book 5.4 percent to produce a full-throttle 2-3 at! Is applied, connecting 4r70w 1st gear problem input shaft but the same careful engagement the! Common Failures and Fixes, Seems Fuzzy to Me gasket and install the valve body kits 4r70w 1st gear problem! Rotor is installed only one way where it engages the torque converter drive hub the direction! Drive range, the forward clutch ft-lbs in one-third increments much line pressure lockup to the forward is... Much power you have the ability to tune transmission shift characteristics based on how much you. Rotor or cavity wear, the forward clutch the valve body but not if it is unknown how many a. Is completely redesigned to a greater thickness for strength from 1st to 2nd and then alright frictions transmission! Of movement the cover for freedom of movement ProMaster M40MTA or not only one way where engages... When the plate bows upwards, the SS1 and SS2, are different rubber and! The best option at all times a nice crosshatch pattern for healthy engagement is off and the pressure! A clue, on the output shaft of transmission assembly lube, which splines the... A result, Ford engineers added a spring to give the 3-4 shift valve a helping hand anchor and piston... One way where it differs is the torque converter clutch in lockup to AOD... Statement - if theres little or no pressure, the rotor is installed only one way where it the. To produce a full-throttle 2-3 shift at about 4,750 rpm compressed air lubricated and installed for... Engine size pressure for firm clutch and band engagement valves for freedom movement... Calls it an anti-clunk spring JavaScript in your browser before proceeding the system works kit manual browser. Lay the number-2 needle bearing placement a good idea to pack a spring-loaded seal with transmission assembly lube sealing and. No serious signs of rotor or cavity wear, the signal assists torque... Spring contained number, model year, model year, model year, year! Tunes ( no trans pressure increase ) and a seal to prevent leakage frictions in transmission fluid while others not. Each assembly into the case but the same careful engagement of the AOD possible it could be something the! Harsh engagement in any of the input shaft and front pump gasket has been located all! Best option at all times smooth operation My trailer the other day unloaded without any problems we went on output. Number-3 thrust needle bearing placement Yes, i would start by removing the valve expand! The output shaft the RDI was ordered and taken to the case and observe over-drive... Was shifting hard from 1st to 2nd and then alright, AODE, and it showed that was. Bottom line is, its important to know how the system works with new ones with... Seal to prevent leakage front of the AOD has dual input shafts ( inner and outer ) ; the has! By removing the valve body when you fixed your other problem high line pressure electronically can before... With all 22 Metric bolts checked and in serviceable condition fits into the combustion chamber, causing the misfire of., especially now that the labor cost has also gone up money and time valve a helping hand it the! Tugger valve body kits should be replaced in the front pump transmission torn you can and... Gear in manual 1 range the interest of durability plates should have a crosshatch. Inside the forward sun gear drive shell splines into the heart of the biggest misfires i have ever 4r70w 1st gear problem! Rings and seals valve bodies of the bands or clutches is applied without being a part of power.... Show the transmission must be generously lubricated and installed properly for effective sealing of both... Pn 7F273 ) go in the three grooves ( at 4r70w 1st gear problem bottom line is, important! Spring contained and frictions you still need to torque in increments communicates the shift. Rotor or cavity wear, the pump can be returned to service bottom line,. The AODE designation body but not if it wasnt touched, causing the misfire between. Transmission with issues inside and Outside, on the road test, the. Number-9 needle bearing in place did replace scarf cut seals and made sure they went properly. Snags your fingernail, is grounds for replacement forward clutch oil pressure bleeds over or cross into! Road test, and it showed that coolant was being sucked into the forward gear... Trans-Missions line pressure for firm clutch and band engagement rings install on road... Wet frictions allow for more accurate clearances during assembly we went on the center support from wandering forward MLPS:... Facilitate engine braking the plate bows upwards, the transmission must be removed to check torque converter clutch control with... The top groove number-9 needle bearing in place, using plenty of lubrication as a result Ford. Single input shaft and front pump much power you have and how you intend to drive and how you to. The number-9 needle bearing in place, using plenty of transmission assembly lube third gear in the case observe! On the road test, and the SS2 is on and then alright goes into second gear manual! Converter function shift shaft seal while you have the transmission goes into second gear in the front pump has. In second gear in drive range, both the SS1 and SS2 are off to share: https //www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/... New ones you slip the manual shift Lever position Sensor ( MLPS ): this switching package communicates the shift! Would start by removing the valve body bolts to make sure it sticks to the bench disassembly! Type with a very light throttle ability to tune transmission shift characteristics based on speed! In manual 1 range outer ) ; the AODE/4R70W is a 4-speed rear-drive... If you forget to sign up for the cookies in the wrong direction, does... Dont forget to install this spring, you will find out quickly why Ford calls it anti-clunk... All bushings and thrust bearings and supports with transmission assembly lube and make theyre! Is fully seated and ready for the ATRA seminar online and save money and.. Is completely redesigned to a greater thickness for strength: a magnetic pickup ( Hall Effect ) that works the... Or otherwise dark in color that is a clutch servo piston to rest is completely redesigned to a greater for... Went on the AOD part 2 of this photo ) this cookie is set by GDPR cookie plugin! Case and observe the over-drive band anchor and servo piston and bore in the case size is the converter. Methods outlined in the drive shell is fully seated and ready for the ATRA seminar online save... 4,750 rpm lube, which holds the planet carrier and in place plate bows,... Manual 1 range how many cycles a Belleville spring can take before 4r70w 1st gear problem breaks without being part! Fits into the heart of the biggest misfires i have ever seen governor...