No overdrive on 4L60E
02-16-2006, 06:52 AM
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No overdrive on 4L60E
Tranny rebuild recently at a local shop - actually, 3rd rebuild in 3 weeks. Tranny shifts perfectly 1-2 and 2-3. TCC lockup occurs in 3rd. Everything works/shifts/downshifts as expected but it will not shift into OD at any speed or any throttle position. I thought it might be a linkage problem, but it won't do OD even if I move the shift lever between OD and N. I would assume solenoids are fine since I have all 3 other gears. What mechanical parts should I check? If I have a Tech2 or similar scanner hooked up (I haven't yet) and it indicates that the PCM is commanding the shift into OD, what would be the next logical step for diagnosis? I read (using SEARCH 
) that it's possible a seal or o-ring on one of the apply pistons may have been messed up upon assembly. This sound familiar/correct? I just want to have an idea of where to start.
) that it's possible a seal or o-ring on one of the apply pistons may have been messed up upon assembly. This sound familiar/correct? I just want to have an idea of where to start.
02-16-2006, 07:36 AM
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Start by looking at the forth gear servo. It may have a torn teflon ring. If that's all good I would probably look into sticky valves or missing check ***** in the valve body. What's the deal with the local guy? Doesn't he want to fix what you paid for? Sorry to hear this story again, good luck!!! 
02-16-2006, 02:45 PM
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I Had The Same Same Problem And It Was A Checkball Problem, . About 5 Minutes Ago I Started Taking My Tranny Out Again, Because Of My Pump Failure, And Yay, No Metal In The Pan This Time. But Ima Still Tear It All The Way Down To Be Certain, Im Actually Getting Pretty Good At Doing This Since Its My Fifth One, Lol.
02-17-2006, 08:39 PM
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had the same problem. no od. in fact. first built tranny burned od up on the initial test drive. took it back and never had od. now it is in lilreddevils hands. i have no clue what could be the culprit. but i hope you get it fixed and since you have a warranty it should easily get done.
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02-17-2006, 08:55 PM
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I don't care if it is under warranty, get your money back and take your business elsewhere
What are you going to do when it fails just outside the warrantied time period?
What are you going to do when it fails just outside the warrantied time period?
02-17-2006, 09:08 PM
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Originally Posted by Colby 04
I don't care if it is under warranty, get your money back and take your business elsewhere
What are you going to do when it fails just outside the warrantied time period?
What are you going to do when it fails just outside the warrantied time period?
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