Hello, for those who have experience replacing the transmission bushings in the TH400, 4L60E, and 4L80E, do they share the same size bushings? What can you tell me about the differences and similarities?
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If all goes well, should have a 99 K2500 in the next week or so. In the process of buying it now. Will be rebuilding its 4L80E myself eventually and dropping in an L31 HD. Basically want a new powertrain as I do not know the history of the current, and I plan to keep the vehicle for a long time. I do not like reman units, so I'd rather rebuild the transmission myself (I also enjoy it).What year is the transmission you are rebuilding? Page 108 of the ATSG goes into detail on the sun gear shaft revisions. Make sure your overhaul kit matches the corresponding bushings here.