Re: It does not do it in sport mode; WTF? (e) (archive)

: : : When I am driving at about 75mph and I let off on the gas, my tach moves up to 3100rpm from around 2900rpm. I thought that it should decrease since I let off on the accelator.
: : : WTF? Should it do this? It seems to drive fine.
: : : 1997 328is AUTO.
: : I haven't noticed this. Try the car in Sport mode. Still happen? If the Torque Converter Clutch was off you would more likely get slipping as you upshift. You might direct your concern to GM Powertrain, the manufacturer. The average dealer doesn't know Jack Squat about these units.

That's good news. You probably do not have anything wrong mechanically. It could be that for a moment the car is shifting out of overdrive and as it does the shifts burp up there a bit. Stuff like this happens with some of my cars if I am on level ground or on a slight decline. Transmission doesn't know which way to go and finally decides to move out of overdrive. The GM automatic has an ECU that monitors performance and shifts and even its temperature. A real problem with the unit usually shows up with a trouble code and a lighted indicator on the dash. I wouldn't worry that much about it, but if you are concerned you could have the unit checked for any leaks or low fluid level. Don't let some bozo though rip the unit apart. He'll introduce dirt into it and give you a real headache.

Follow Ups:

Thanks Bob you are a real help! (e) JEB 328is 10:09 5/30/2000 (0)

[ Follow Ups ] [ 3-series (E36) Message Board ] [ Msg. Board FAQ ]

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