Originally Posted by
IDIDieselJohn
DO NOT run anything else but ATF in a ZF5!
The clearances in this tranny are very very tight, thick oil will not get everywhere it's suppose to....
x2
Old manual transmissions take thicker oils, newer ones take ATF.
hardwaterfreak, describe shifts like hell??
Aune163rd, does 1st work fine? Is reverse grinding the problem you're having? This could be the clutch not completely releasing or the pilot bearing dragging. The latter was the problem with my truck.