The official ZF 4hp22 (automatic) thread

[bastianshaw]

Since pickin one of these up i have discovered very little info on these. The general consensus is to swap it for a manual; but there are some of us (GASP!) that actually WANT an automatic.

I wanted to have a thread to discuss general specs fluids, ratios ect. Post up whatever you think is appropriate.

I think this trans is very underrated, most likely because of the park and nuetral revving seal failure issue. Considering these went on 5 liter v12s and big v8s in cars that weighed close to twice the heaviest go e30s I think they should be good behind the wonderfull m20.

[German Audio Specialties]

http://www.disgruntledgoat.com/content/vehicles/dakar/ZF4HP22.php

[bastianshaw]

Damn, that was heavy, good post.

[bastianshaw]

lol nobody cares about autos

[bastianshaw]

Hello? Echo echo echo....

[gearheadE30]

kamotors had one with some work done to it. I think he swapped it out though, or was at least talking about it.

[cbake82]

well that didnt go far... lol

[bastianshaw]

well that didnt go far... lol

lol yea FWIW after completely flushing my auto ans using I think 7 quarts of redline it shifted smoother and smoother great tranny but even a chipped m20b25 just doesnt have the torque

[TheTacoMan]

Kamotors and I both friend our autos at around 12psi of boost.
I lost reverse and the shifts were no longer crisp. Just sloppy.
It was fast but it was also terrible, it didnt last very long.