Tranny Help

496 Views 2 Replies 3 Participants Last post by Kaizai, Sep 20, 2002

kakalak

Discussion Starter · Sep 17, 2002

I have a '95 850 turbo with a peculiar habit-- when going downhill with no throttle pressure she downshifts. If I apply a bit of throttle she stays in current gear. 2nd problem- is it normal for the car to drop 500 rpm when you take your foot off the throttle at 60 mph? When I reapply pressure she downshifts for a second then goes back to highest gear. (feels like a down shift anyway)
Please need your advice..

Thanks,

Dave

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thevolvoguy

· #2 · Sep 20, 2002

Re: (kakalak)

It probably downshifts to allow you to regain your speed when the hill stops. Just a guess, I live in Houston... we don't know what hills are. http://********************/smile/emsmilep.gif

and No, It is not normal at all. The RPM's should adjust themselves when you take your foot off the gas, but not that much. Going 60mph at 1800-2000 RPM, when you let off the accelerator completely the RPM's should only drop somewhere around 100 per seccond, until you hit your brakes, which will cause the engine to slow faster.

Hope this helps. http://********************/smile/emthup.gif

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Kaizai

· #3 · Sep 20, 2002

Re: (kakalak)

quote:

is it normal for the car to drop 500 rpm when you take your foot off the throttle at 60 mph? When I reapply pressure she downshifts for a second then goes back to highest gear. (feels like a down shift anyway)
Please need your advice..

Thanks,

Dave

If you are accelerating, and then let off the gas, it will up-shift (from say 3rd to 4th), which results in a drop of rpm. If you press the gas again after it up-shifted (in 4th now) it will drop back to 3rd to give you more power.

If that is what is happening, that would be normal, there are too many variables for me to say that is the case, but it could be the case.

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