David..I will ring in and Rainman can confirm..(m) (archive)

or deny...there has been much speculation about
the rev in Park or Neutral scenerio with the
ZF-4hp-22. ZF made an engineering change just
prior to release of the E-32 to revise the input
shaft seal from steel to Teflon in an effort to
curb leakage. Overtime the steel seal would wear
and cause wear to the input shaft causing presurization of the A-clutch when it is not engaged causing failure...particularly if the car has been driven first. As a result, A-clutch pack failures have dramatically reduced for the E-32 from the preceeding E-23 model...BUT..they still occur. Conventional wisdom is don't rev your motor in park or neutral if you can help it.
Frequent fluid and filter changes are recommended.
I wouldn't worry about this one occurence...particularly if the car drives well.
Good Luck,
George
90 735il/145k

Rainman, I posted this question earlier (accidentally posted as 'Math Man' rather than my real name) and Kevin suggested you could probably help with the answer. I would have emailed you directly but couldn't fine an email address. Thanks in advance! Don
I went to try to get a State Inspection sticker in Dallas, TX and the technician started reving the engine when the car was attached to the sniffer. I stopped him because I remember this was a no-no with my 85 735i. On the E23, the test was done at idle only because of potential damage to the auto transmission. I also remember the testing equipment was aware of this fact and only required the E23 to pass the test at idle.
The (new) machine at this location did not instruct the technician to do an idle only test. I could not take the chance. Did I do the right thing?
Thanks,
Don Foote
Dallas, TX
E21, E23, E32

Follow Ups:

[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]

Questions, comments, or problems, please visit the Roadfly help desk.