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Question for Bimmerbill..... (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by George on February 28, 2000 at 12:39:38:

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
premature failure.
Let me know what you think.

Best Regards,
90 735il/138K

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.

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