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AODE and 4R70W Troubleshooting     List of Categories

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  1. i have a 4r70w in a 95 f150. first of all what type of fluid should i use. and secondly what would cause the truck not to get any acceleration. it works in reverse, but thats it. there is nothing in 1,2,3,or 4th gear. if someone could help that would be awesome. thank you.

  2. I have a 1994 cougar, and have a problem occuring, mostly but not always when cold, that when the transmission shifts from 3rd to 4th, I get a shudder that feels like going over rumber stips, just for a second. After in overdrive it usually does fine, but sometimes it will shudder for a split second and then go away. And again most the time this is fine, but I have also notice sometimes, while crusing at a constent speed for a couple of minutes, and then press on the gas, it will shudder just for a split second. Most of the time this happens when the car is cold, and very rarely does it when the car is hot. I did a full fluid change, torque converter and all, with filter, and was told to put mercron 5 in so I did, with no change. Any help would be great. Thank you.

  3. My truck won't shift into drive unless the rpms are about 2500,reverse catches right away.It is a 2001 F-150 4r70w

  4. I was just wondering if anyone could tell me why the 4R70W transmission in my 94 tbird works better when its warm and slips and acts sluggish when its cold. I cant drive it in the winter time because its really bad. If anyone has any ideas, It would be a big help. thanks

  5. ok i have a 1994 ford mustang with a 3.8 liter V6 and well it was being towed from hopewell virginia with the rear tires on the ground and when it got into kentucky the transmission was smoking now it wont shift into second whats wrong

  6. I have a `91 F150 with the AODE. The truck will only pull in reverse - no forward gears. It does not seem to be engaging forward gears at all. There are no noises, and the fluid is clean. What is the most likely cause?

  7. I replaced my 02 mustang gt 4R70W to an 04 mustang gt 4R70W and installed a transgo shift kit. I used my stock wiring harness and sensors. The car stays in OD when taking off and the speedometer goes to 150 mph at about 15-20 mph! When slowing down it goes back down about 15 mph. I rechecked all the connections and pins and tried switching the sensors from the other tranny with no luck. Did ford change the speed sensor wiring on the 04 4r70w? should I try to switch the wires? The car will shift manualy but torque lockup is sperratic! I also tried to reset the computer twice with no prevail. Any input would help!

  8. I recently purchased a Lincoln with no forward drive, The guy I bought it from said reverse quit first, and he drove it for 3,000 miles forward only. Now reverse works great, but no forward movement. could this be an electrical problem? Seems if it were mechanical, reverse shouldn't work now either. The car is a 1994 Mark VIII with a 4.6L DOHC and 4R70W. Thank You

  9. Hello, I have a 2000 mustang gt with the stock aode/4r70w. the trans will not down shift to first on its own and when pulled down into first with the shifter it seems to fall into both 1st and 2nd and bind up every other shift is as it should be. should I be looking for an electrical problem or looking for a good tech to rebuild it? Thanks for any input. jeff

  10. I have a 4r70W in a 2001 F150 5.4L 4x4. 39,000 miles. I lost OD and reverse at the same time. Are there any relations there? It always had the 2-1 shift clunk too. Is it a mechanical problem?







  1. i have a 4r70w in a 95 f150. first of all what type of fluid should i use. and secondly what would cause the truck not to get any acceleration. it works in reverse, but thats it. there is nothing in 1,2,3,or 4th gear. if someone could help that would be awesome. thank you.

    I always recommend sticking with the factory specified fluid if the transmission is stock. For your truck it would be Mercon fluid. Based on your transmission's symptoms it sounds like you have a worn forward clutch. Worn forward clutches would cause a loss of 1st, 2nd, and 3rd gear. If you could accelerate the vehicle 4th gear would still work, so I am guessing you just can't get to fourth gear because you can't get the truck moving. The transmission sounds like it is going to need a rebuild, but if you wanted to be really sure you could have it tested using an external manual control box that connects to the transmission wiring and can command each gear without requiring the vehicle to be moving. If fourth gear (overdrive) works this way, then it is definitely your forward clutches. The problem has to be mechanical or hydraulic, as there is no electrical failure that could cause your exact problem.

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  2. I have a 1994 cougar, and have a problem occuring, mostly but not always when cold, that when the transmission shifts from 3rd to 4th, I get a shudder that feels like going over rumber stips, just for a second. After in overdrive it usually does fine, but sometimes it will shudder for a split second and then go away. And again most the time this is fine, but I have also notice sometimes, while crusing at a constent speed for a couple of minutes, and then press on the gas, it will shudder just for a split second. Most of the time this happens when the car is cold, and very rarely does it when the car is hot. I did a full fluid change, torque converter and all, with filter, and was told to put mercron 5 in so I did, with no change. Any help would be great. Thank you.

    It is probably the converter clutch. If the clutch is worn or glazed changing the fluid may not correct the problem. There is also a valve body problem that can cause the converter clutch to shudder. You can try installing the sonnax bypass clutch control valve as sold on our other FAQ about converter shudder.

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  3. My truck won't shift into drive unless the rpms are about 2500,reverse catches right away.It is a 2001 F-150 4r70w

    It sounds like your forward clutches are worn. The forward clutches are engaged in 1st, 2nd, and 3rd. Power for reverse comes in through the reverse clutch pack which is apparently undamaged. Before pulling the transmission you should perform a pressure check on the Forward pressure tap to verify that at least 50 psi of line pressure is reaching the forward clutch circuit when the shifter is in the OD position. If you are getting adequate pressure here and no gear application then the problem is in the friction materials in the forward clutch pack. If little or no pressure is reaching them it could be a valve body problem, or an internal seal leaking.

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  4. I was just wondering if anyone could tell me why the 4R70W transmission in my 94 tbird works better when its warm and slips and acts sluggish when its cold. I cant drive it in the winter time because its really bad. If anyone has any ideas, It would be a big help. thanks

    In general transmission fluid works better when it is warm. When the fluid is cold it does not flow as well and the friction modifiers don't work as effectively. Slipping when cold is often one of the first signs of a transmission that is ready to fail. I would recommend checking the line pressure to make sure the pressure is the same (within 5 or 10 psi) when the transmission is cold and hot. If the pressure is the same cold and hot then you will likely need a rebuild because your clutches are wearing. You could also try a fluid change if you haven't already, but if the slippage is bad this won't be a help. If a fluid change does help, be warned this is still only a temporary solution, and you will likely be needing a rebuild soon.

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  5. ok i have a 1994 ford mustang with a 3.8 liter V6 and well it was being towed from hopewell virginia with the rear tires on the ground and when it got into kentucky the transmission was smoking now it wont shift into second whats wrong

    When towing an automatic transmission the drive wheels either need to be off the ground, or the drive shaft needs to be removed. If you tow an automatic with the wheels on the ground the driveshaft turns which causes the geartrain in the transmission to turn, while the front pump stays stationary. In normal operation the engine turns the front pump to provide lubrication to the geartrain. When an automatic is towed this way it causes the geartrain to rotate with no lubrication. Think of it like running an engine with the oil pump removed. Really bad things will happen. The fluid also cools the friction and one -way clutches, and it sounds like your intermeiate clutches were rotating and have been damaged. I would expect to find massive damage in this transmission and I wouldn't recommend using any part of the geartrain if you were to rebuild it. There may be damage to the gears that isn't easily detectable.

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  6. I have a `91 F150 with the AODE. The truck will only pull in reverse - no forward gears. It does not seem to be engaging forward gears at all. There are no noises, and the fluid is clean. What is the most likely cause?

    The most likely cause is a damaged forward clutch pack. You can check with a gauge to make sure forward clutch pressure is present. There is a tap on the case labeled FWD that you can connect a pressure gauge to. Use at least a 200 psi gauge. If you have pressure at this port when the shifter is in OD then your problem is almost certainly the forward clutch pack.

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  7. I replaced my 02 mustang gt 4R70W to an 04 mustang gt 4R70W and installed a transgo shift kit. I used my stock wiring harness and sensors. The car stays in OD when taking off and the speedometer goes to 150 mph at about 15-20 mph! When slowing down it goes back down about 15 mph. I rechecked all the connections and pins and tried switching the sensors from the other tranny with no luck. Did ford change the speed sensor wiring on the 04 4r70w? should I try to switch the wires? The car will shift manualy but torque lockup is sperratic! I also tried to reset the computer twice with no prevail. Any input would help!

    In 2004 Ford made a mid year change to the ring gear. The old style ring gear has six holes machined in it that the Output Shaft Speed sensor (OSS) gets its signal from. The new style has 24 raised lugs that the OSS gets its signal from. The new style gives 4 times as high of a frequency per revolution of the output shaft. This is almost certainly your problem. We do sell a divider box that will divide this signal by four to give the proper frequency signal to your computer. If you want to be sure that this is your problem, remove the OSS and inspect to see if the ring gear inside has raised lugs. If the raised lugs are present then it definitely is the 24 pulse per revolution style transmission.

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  8. I recently purchased a Lincoln with no forward drive, The guy I bought it from said reverse quit first, and he drove it for 3,000 miles forward only. Now reverse works great, but no forward movement. could this be an electrical problem? Seems if it were mechanical, reverse shouldn't work now either. The car is a 1994 Mark VIII with a 4.6L DOHC and 4R70W. Thank You

    Actually forward and reverse get their power from two seperate clutches so it is very possible for all forward movement to be gone, yet still get reverse. Also, electrical problems can cause this transmission to be in the wrong gear, but the computer cannot command neutral, so if you have a no drive condition it is a mechanical problem.

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  9. Hello, I have a 2000 mustang gt with the stock aode/4r70w. the trans will not down shift to first on its own and when pulled down into first with the shifter it seems to fall into both 1st and 2nd and bind up every other shift is as it should be. should I be looking for an electrical problem or looking for a good tech to rebuild it? Thanks for any input. jeff

    The electronics can command the wrong gear at the wrong time, but it would not put the transmission in a bind. I couldn't say for sure without performing some tests on the transmission, but it sounds like you're looking at a rebuild.

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  10. I have a 4r70W in a 2001 F150 5.4L 4x4. 39,000 miles. I lost OD and reverse at the same time. Are there any relations there? It always had the 2-1 shift clunk too. Is it a mechanical problem?

    It is definitely a mechanical problem because there is nothing electronic about reverse. The only relationship between these two gears is that they both use the reverse sun gear to operate. In OD the reverse sun gear is held stationary, and in Reverse the reverse sun gear is rotated. You could have a broken weld that holds the sun gear to the sun shell, but if this were the problem you should also not have 2nd gear. It wouldn't neutral out in second gear, but when it commanded second gear the transmission would still be in first gear. You would have first gear for a longer period of time, and then a shift from first to third. If you also have this second gear problem then your reverse sun shell/gear is likely damaged.

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Last updated on January 5th, 2008