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[omegasport]

hi all i was wondering if someone could help me im not sure if its a common problem but on my 2.0 auto 1995 when cold when u are in first gear the rev counter goes upto 5000 revs before changing up to next gear is there a solution for this or is it a case of the box being old and theres nothing i can do to solve the problem but when i drive for a about 3 or so mins its back to normal. please please help

thank you

[feeutfo]

this is part of the noramal warm up procedure, although 5k seems a little high?

Press sport mode or snow button briefly, and it should snap out if it.

[Andy B]

They all do that Sir! 
Seriously, it does this by design, it's meant to do it. They say it's to help get the cats up to temp ASAP, Senators & Carltons did the same thing. 

[joshwyatt]

As far as I remember, when cold the gearbox changes up at higher RPM to help warm the cats up quicker. But I think 5k RPM is excessive, I do notice when cold it changes up at higher RPM.
I believe it was mentioned that by putting it in snow mode this can snap it out of this.
But I've never had cause to try it, and hopefully someone with more knowledge of the auto gbox will be along soon to advise.

EDIT: Too slow 

[Andy B]

.....

EDIT: Too slow 

Me too!  :-?

[omegasport]

hi ok i have done that a few times by pressing the snow button .so it wouldnt be anything to do with the gear box oil and filter ? ive not long purchased the car so would it be an idea to sort that .

thanks

[omegasport]

i used to have a 3.0 mv6 on a 1999 and that did it the once and only hit 3000 rpm and straight back to normal so i didnt find that a problem in that car u hardly notice .

[feeutfo]

auto box service wont hurt, filter can be washed out with parafin or similar as the genuine gm filter is almost 70 sobs. 10 litres of dex3 will cover it, fuchs titan 4000 perhaps. Can use gaskits or gaskit goo.


How many miles, any history showing a fluid change, any baning or thumping when engaging drive on level ground is usually a sign the atf needs changing.

[omegasport]

hi i have service history but no sign of it in the book of being changed the car has done 96000 miles the gear change is very smooth too

thanks

[feeutfo]

hmm, well the box is due a change, 60 to 70k is oof recomended interval for auto's, but i cant see that helping the cold change up point, unless 4 pot plays differant with an auto box? or any engine codes? cam sensor fault can send the box wobly.

Failing that i guess tech 2 for a diag or box firmware update.

[feeutfo]

should add, tech 2 via members here, avoid the dealer, muppets mostly.