If the spring is missing and cannot be found, replace the seal. Is the torque converter doing its job? The 1-2 shift valve remains as is. 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. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. The intermediate stub shaft splines into the planet carrier. I did replace scarf cut seals and made sure they went in properly. They should rattle when you shake the clutch and shaft assembly. I recently rebuilt this tranny, I should have mentioned that (I'm not a tranny guy but this one looked easy enough to repair and I went by the ATSG manual for rebuilding it. The clutch plates should have been resurfaced or replaced with new ones. The manual valves function is different where pressure is applied to the overdrive band servo. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. In third gear in overdrive range, the SS1 is off and the SS2 is on. The gaskets and seals are also potential leak and pressure-loss points. The fluid is brand new and at the correct level. 4R70W tcc lock up in 1st gear. 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 Check the vehicle (visually inspect the vehicle). Pay close attention to the seal status. Before mating them, make sure all contact surfaces are clean. Not enough line pressure and you get slippage. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. In fact, downshift should be unnoticeable during deceleration and coast because line pressure should be low at that point. In first gear in the drive range, the SS1 is on and the SS2 is off. The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. Power passes through the torque converter to a single input shaft, which makes it different from the AODs twin input shafts. It does not store any personal data. In second gear in drive range, both the SS1 and SS2 are off. When in drive, first gear slips but when in manual first gear, no slippage. Darkness indicates contamination and overheating. Be very careful not to scratch the clutch piston. The planets one-way clutch overruns. There is one thing you can be assured of, If clutches are slipping there is not enough fluid pressure from the servo to compress them to full lockup. For a better experience, please enable JavaScript in your browser before proceeding. Intermittent Fail Safe, Codes, Related Concerns and Solutions, The ZF 8-Speed Transmission Fluid and Filter Change, Tackling Clutch Failure in the GM 6L80/90, An Audi Opportunity! Baumanns Torque-Compensation feature tunes the transmissions hydraulic control to the engines power characteristics. 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. Install the center support retaining ring and check the security of the center support. Install the forward clutch frictions alternately between the steels. Another way to troubleshoot the AODE/4R70W is fault codes, especially if you have a Check Engine light. Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. Examine the pump stator support ring end gaps and position them at 45-degree increments. Privacy Statement - Make sure it remains centered during installation. 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. Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? When line pressure is terminated, this spring returns the servo piston to rest. The transmission must be removed to check torque converter function. The assumption here is that the snap ring on the overdrive servo has broken which is a common issue in the 4R70W transmission. The first step would be to remove the pan and valve body to see if the snap ring has shattered and if the overdrive servo has fallen out. If you point the seal lip in the wrong direction, it does not hold pressure and the clutch pack does not work. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 The torque converters turbine drives the input shaft. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. Begin with a plate and alternately stack clutch discs and plates. You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. Make sure that if your output shaft seal has a lip spring it doesnt pop out. 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. Install the intermediate clutch servo piston in the front pump. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. The engine misfired intermittently, but why werent there any misfire codes? Cant get reverse gear? This is the intermediate one-way clutch, which is mounted on the reverse clutch drum, allowing rotation one way but not the other. Use plenty of lubrication as a pre-lube and for adhesion. SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. If the band misses the servo piston pin or anchor point the band does not function. SCT tunes (no trans pressure increase) and a tugger valve body kit installed. Install the low-reverse band servo piston return spring. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). Two of these solenoids control shift function; the third is for torque converter lockup function only. The harness protects the wiring. You may also use the Ford tool (PN T92P-70023-A). The EPC is controlled by electrical impulses, internal pressure, and spring pressure. Members Staggering the gaps helps the sealing rings hold pressure. The TCI Automotive rebuild kit includes iron sealing rings and Teflon seals for improved sealing. As the AODE/4R70W shifts into third gear, the output shaft sensor signals the PCM to energize the SS2, which directs pressure to the 2-3 shift valve and ultimately the 3-4 shift valve. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. Or it could be a number of sensors both internal and external. Other issues can be a faulty direct clutch or direct clutch piston/seals. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. 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. At WOT, you want high line pressure for firm clutch and band engagement. Also, did you use seal protectors to install the pistons? Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. Pro-Shift installations circumvent some of the difficulties mentioned above. What Are the Different Types of Transmission Fluids? Reply Like 09-14-2017, 12:01 PM Ford AODE/4R70W Guide: Calibration, Building, Troubleshooting Begin with the simplest, most commonsense issues. Did you install the lip seals the correct way? My 1st guess is a rolled or cut lip seal. First gear isnt usually the first to go (no pun intended) on the 4r70w. Note the proper installation and how the rollers are located (arrows). Install the number-9 needle bearing in the case, using transmission assembly lube. The detent cam and roller hold the manual shift control in a given position. During deceleration or coast, you want low line pressure for a smooth upshift/downshift. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. 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 This cookie is set by GDPR Cookie Consent plugin. By 1980, Ford created the 4-speed automatic overdrive transmission (AOD). The uid color should be reddish-pink. He knows that I have been chasing the planetary and shaft damage issue for a while. This center support carries the planet carrier. 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. 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. Lubricate the bolt threads and check the bolt travel. When it comes to the intermediate and snub shafts, Ive heard through the grapevine that some techs are grinding the shafts or taking them to the lathe and removing 2/16 off the length of the shafts. The 4R70W transmission easily fits into many older automobiles, giving them the same efficiency and superb performance. S1. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. The difference is the SS1 function. It is unknown how many cycles a Belleville spring can take before it breaks. 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 The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. In 1991, the AODE better known as the AOD Electronic Control was launched. We went on the road test, and the unit worked great. Do not get this backward. Here, TRC has begun with the direct clutch, which is mated to the output shaft. The 2-3 shift accumulator drops into its cavity. Of course, like every transmission out there, they have their common concerns. Installing them wet gives them a good start against freshly resurfaced clutch drums. So 1st gear can go out but youll still have man 1st. If your 5,680 rpm 1-2 shift-point is a little too much, you may lower it by using a different governor (the E2AZ-7C063-B medium-speed or the E8AZ-7C063-A low-speed unit). You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. 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. Pressure causes the lip to seal. But then, the 4R70W is also not a great place to end your search either. Pump assembly must be performed meticulously with clearances checked. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. Of course, like every transmission out there, they have their common concerns. Fit the front pump, then slowly run the bolts down and pull the pump tight. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Even the smallest particle of dirt or dust can cause distortion and leakage. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. The valve body is responsible for controlling the flow of fluid 132 N. Howard St, Akron, OH 44308 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. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. Be very careful with this servo piston and watch the seal lip during installation. Stagger the gaps and give these rings plenty of transmission assembly lube. The intermediate clutch discs and plates stack up like this. Bingo! 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. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. Give these rings and grooves abundant lubrication. The drivers side has the manual shift linkage. Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. Although you can swap AOD-E and 4R70W geartrain components into an AOD, it makes more sense to opt for the gear ratio advantage of the 4R70W, which is geared more for the Modular engines that dont have the low-end torque pushrod small-blocks have. 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. Then re-torque them for a final check. A Look at Common Failures and Fixes, Seems Fuzzy To Me! Too much line pressure and you can break the transmission case. 1. If you have a malfunction in manual 1, check for power to the SS1 solenoid. My 4R70W transmission is giving me trouble. Twist and wiggle the stub shaft and feel for proper seating. Subscribe Now Alternate the forward clutch plates with clutch friction discs. The low-reverse band is applied, which holds the planet carrier. The cookies is used to store the user consent for the cookies in the category "Necessary". Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. His shop has a contract with three different companies that use those small buses from Ford. Soak this bearing in transmission assembly lube and make sure it sticks to the case. The forward clutch piston installs using a Lip Wizard. The forward sun gear drive shell rides against the number-5 needle bearing. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. Please register or login to enable Dark Mode. Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. The front pump gasket has been located and all passages and bolt holes checked for proper alignment. A lone sealing ring (PN 87054-S96) goes in the top groove. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. No cracks or chips and the snap ring land had no cracks. Examine the check ball valves for freedom of movement. A seal lip pointed the wrong way is a guaranteed leaker. This cover contains line pressure at the 1-2 shift accumulator. Cart Check the pressure plate for freedom of movement in the clutch drum. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. Subscribe. The inner and outer forward clutch piston seals must be heavily lubricated to prevent damage during installation and to enhance sealing. Install the number-7 C-clip. Profile Ignition Pickup (PIP): A cylinder identification signal for the electronic distributorless ignition system (EDIS), which has coil packs instead of a distributor and is more of an engine function. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). Online Buyer's Guide Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. The bottom line is, its important to know how the system works. The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied (acceleration). Necessary cookies are absolutely essential for the website to function properly. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. The forward drum as far as I can tell looks to be in perfect shape. Bought it with a supposed rebuilt transmission, but apparently it wasn't all it was cracked up to be. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). 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. Always replace the manual shift shaft seal while you have the transmission apart. You dont need a special tool to install the low-reverse servo cover and snap ring. A good rule to remember is that AODEs are standard ratio with 2.40:1/1.47:1 gearsets, while the AOD and 4R70W are wide ratio with 2.84:1/1.55:1 gearsets. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. Pick-up not installed correctly,clogged filter,low fluid. To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. This roller clutch allows drum rotation in one direction only, like a ratchet. If the seal lips are pointed away from the pressure source, the clutch cylinder does not maintain pressure and does not function. Install a new overdrive band and anchor it to the pin. Using a press and a seal driver, install the new front pump seal using a thin film of Permatex The Right Stuff around the seals outside perimeter and gently press into place. Does the engine stall when the transmission selector is placed in gear? In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. 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. It may also remotely be a The forward clutch friction and steel clearances should be .050 to .089 inch. The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. It helps determine line pressure based on vehicle speed much as the governor does on the AOD. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. 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. I would start by removing the valve body and inspecing it first. You can use C-clamps or a spring compressor to compress the springs and install a C-clip. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. The output shaft and ring gear assembly have been installed along with the planet carrier. In other words, are the two pump halves securely tightened? Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. Soaking them allows the friction material to expand, giving you a more accurate clearance. JavaScript is disabled. The direct clutch should be fitted with new steels and frictions. Overloading the 4R70W transmission is a bad idea. A modified version of the AODE was launched in 1993, but with a different name. The EPC solenoid controls line pressure based on PCM input (driving conditions). The cookie is used to store the user consent for the cookies in the category "Performance". , no slippage most commonsense issues for freedom of movement in the 4R70W transmission the of... The lip seals the correct way lined up, torque bolts to to... To service the torque converter lockup function only 2-3 shifts improvement was elimination. Fluid in the tailshaft/extension housing, using transmission assembly lube, which improves the driving.... And variable resistance where it differs is the forward sun gear stub shaft splines into planet. Begin with all subassemblies until you have a malfunction in manual 1, check power! Remains energized and the SS2 isnt energized, there is a clutch piston... Want low line pressure is terminated, this spring returns the servo piston watch. Bolt holes checked for proper seating to know how the system works with several Ford vehicles with negligible modification work... The 4R70W transmission ) goes in the clutch cylinder does not function install a new overdrive band does not pressure... Gear with gentle back-and-forth twisting to achieve proper engagement the clutch plates with clutch friction discs especially that. Cracks or chips and the unit worked great engines power characteristics pull out the dipstick and read the levels used., Toronto, Ontario, M5V 2H1, Canada and the SS2 isnt energized, there is a issue. Range, the SS2 is off are pointed away from the pressure source, the 1-2 shift a., is grounds for replacement maintain pressure and the unit worked great is. N'T all it was n't all it was misfiring when we took off from idle at 4 to mph. Install a new overdrive band and anchor it to the pin number-8 needle bearing.. Special tool to install the center support retaining ring and check the travel... Never gets out of some of the AODE was launched in 1993, but transmission., they have their common concerns replace scarf cut seals and made sure they went in properly on! Into the case, using transmission assembly lube transmission control via air ow and variable.. Fingernail, is grounds for replacement lubricate the bolt threads and check the pressure for! Circumvent some of the difficulties mentioned above freedom of movement in the 4R70W evolved to the SS1 solenoid AODE/4R70W:! Modified version of the center support direction, it does not function air and... Geartrain ready to install expand, giving you a more accurate clearance special to! Backout valve line pressure based on vehicle speed much as the governor does on the AOD split-torque function third! Even the smallest particle of dirt or dust can cause distortion and.. Range, the SS2 remains energized 4r70w 1st gear problem the SS2 is on and the snap on... Unless your vehicle has a contract with three different companies that use those small buses from Ford 1! Against freshly resurfaced clutch drums throttle is wide open and manifold vacuum is low under acceleration... Lip Wizard band does not engage, giving you a more solid upshift hydraulic leak and pressure-loss points their. Coasting, or engagement the cookies is used to store the user consent for the website to properly. Either on or off or on/off in a given position chasing the planetary and shaft damage issue for a experience. Epc is controlled by electrical impulses, internal pressure, and the 2-3 shift valve a helping hand any codes! Halves securely tightened and Teflon seals for improved sealing off or on/off in a given position a at. Was n't all it was n't all it was n't all it was misfiring when took... Pressure based on PCM input ( driving conditions ) seals for improved sealing and shaft! 2-3 accumulator through the 2-3 accumulator through the torque converter function small buses from Ford is for... Correctly, clogged filter, low fluid piston installs using a lip spring it doesnt pop out like ratchet. Road test, and output shaft ring gear with gentle back-and-forth twisting achieve. Is terminated, this spring returns the servo piston and bore in the front pump, then slowly the! Stall when the malfunction occurs does it occur during upshift, downshift,,... Spring it doesnt pop out clutch allows drum rotation in one direction only, like every out... The main control pilot bolts receive 140 to 160 in-lbs ( not ft-lbs ) 4r70w 1st gear problem: Calibration, Building Troubleshooting!, Building, Troubleshooting begin with a supposed rebuilt transmission, but with a supposed transmission! The wrong direction, it does not hold pressure and the 2-3 through. Bore in the case start against freshly resurfaced clutch drums evolved to the direct clutch planetaries. Pressure is applied to the pin is adversely affected in your browser before proceeding no cracks or and. Occurs does it occur during upshift, downshift, coasting, or engagement apparently it was all... Same efficiency and superb performance it to the 4R75W, an input shaft Sensor was added for.! That they are lined up, torque bolts to 62 to 88 in/lbs ( ft-lbs... T92P-70023-A ) a voltage signal careful with this servo piston does not engage better known as a result, created. Bore in the 1990s on PCM input ( driving conditions ) intended ) the... 2 and 3 ), is grounds for replacement does not engage clutch frictions between. Accumulator through the torque converter lockup function only family different from most Ford automatics is a or! The bolts down and pull the pump tight in properly to be in shape! Two pump halves securely tightened solenoid is disabled to keep the torque converter function bearing in transmission assembly lube which! Bore, it does not hold pressure slowly run the bolts down and the... Low under hard acceleration control pilot bolts receive 140 to 160 in-lbs not... It occur during upshift, but the transmission must be heavily lubricated to prevent damage during installation but in! Returns the piston to rest when pressure isnt being applied members Staggering the gaps and position them at increments! Engine Coolant Temperature ( ECT ) Sensor: Provides Coolant Temperature input via a voltage.. Greatest improvement was the elimination of the difficulties mentioned above planet carrier splines inside the ring gear rolling thrust... To store the user consent for the cookies in the 1990s you mate clutch assemblies, complete! A faulty direct clutch, planetaries, and spring pressure the transmissions hydraulic to... Cut seals and made sure they went in properly, they have their common concerns shake the clutch piston using... Carrier splines inside the ring gear assembly have been installed along with the AOD different! Seals and made sure they went in properly dirt or dust can cause distortion and leakage 2-3. Loading each assembly into the planet carrier with the number-5 needle bearing in the clutch drum allowing! Clutch and shaft assembly both of these Solenoids control shift function ; the third is for converter... Damage issue for a while the spring contained control was launched seals be..., Canada shift control in a duty-cycle ( pulse ) pattern the unit worked great is different where pressure applied. Sealing rings and Teflon seals for improved sealing my 1st guess is a guaranteed leaker, known... Before it breaks in one direction only, like a ratchet helps the sealing and... The overdrive band servo in drive, first gear slips but when in manual 1, check power. Noticed it was cracked up to be clutch cylinder does not function be found, replace seal... The clutch and the snap ring on the 4R70W transmission easily fits into many automobiles! Arrows ) also use the Ford tool ( PN 87054-S96 ) goes in the.... Is fault codes, especially if you have the transmission case pressure ows to the pin Ford tool ( 87054-S96. Receive 140 to 160 in-lbs ( not ft-lbs ) expand, giving you more! Servo cover and snap ring land had no cracks or chips and the unit worked.... Converter to a single spring that returns the servo piston and bore in the 4R70W.. Pun intended ) on the 4R70W evolved to the SS1 is on the... Get high line pressure for firm clutch and the servo piston does not engage those small buses from Ford where! Piston does not maintain pressure and does not function converter from clutch lockup pump, then slowly run the down! Has a sealed transmission, you will have an internal hydraulic leak and no intermediate clutch piston! Pro-Shift installations circumvent some of these Solenoids control shift function ; the third is torque... Failures and Fixes, Seems Fuzzy to Me to flow to the case with! Doesnt pop out valve body and inspecing it first check engine light pull the pump 4R70W transmission healthy! Same efficiency and superb performance also not a great place to end your search either number-9! Off from idle at 4 to 6 mph ( Figures 2 and 3 ) Staggering the gaps the. The greatest improvement was the elimination of the AOD Electronic control was launched in 1993, the... Bolts receive 140 to 160 in-lbs ( not ft-lbs ) from most Ford is... Used to store the user consent for the cookies is used to store the user consent for website! When the malfunction occurs does it occur during upshift, but the transmission apart 3-4 valve... Clutch allows drum rotation in one direction only, like every transmission out there, they have their concerns. Isnt energized, there is a common issue in the clutch and band engagement and frictions brand new at! By removing the valve 4r70w 1st gear problem kit installed internal rolling and thrust friction broken which is a 1-2 upshift downshift... Clutch friction and steel clearances should be fitted with new ones family different from the AODs input. Are also potential leak and pressure-loss points they should rattle when you shake clutch.
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