In Reply to: Re: Automatic transmission longevity posted by bimmerbill on February 27, 2000 at 18:46:32:
Do you know if reving the motor in park/neutral
with 1989 and later E-34/E-32's with the ZFHP22 auto trans causes premature A-clutch pack failure? I heard that BMW made a change in '87 to resolve this problem and I also heard this problem was
never completely resolved. Also, Callan wrote on the 7-board a while back that changing fluid
frequently is a two edge sword. It's generally
good to change fluid to remove old abrasive clutch
particles/replace broken down fluid etc., but the higher detergency of fresh trans fluid tends to attack fragile seals and clutch packs promoting
Let me know what you think.
I work on them and in 4 years I have replaced 2 ZF's and 3 GM's. They are bullet proof as long as you don't run them out of fluid or beat the hell out of them.