Quote:



The roller bearings on the countershaft seem to really get hammered the most, ATF doesn't have great lubrication properties compared to gear oil or even motoroil.



The transmissions I have rebuilt that were ATF filled all needed the cluster gear shaft replaced , very noticeable wear pattern from the rollers.

If ATF is the godsend then why does one even have to replace the bearings? They should last forever, correct ?