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transmission starts in first after reverse and shifts abruptly until w

rpcc
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rpcc Member

rpcc

Posted
Posted

Hello -

I back out of my driveway. When I shift to drive the transmission selects "1". It jerks when it shifts from from "1" to "2" and then "3". After it warms up, it seems to start normally in "2" and shifts like butter. Any ideas what's wrong?

wrinkledpants Member

wrinkledpants

Posted
Posted

Turn key on (but don't start car). Push gas pedal to the floor and hold for at least 10 seconds. Release gas pedal, turn car off, pull key out of ignition. Restart car as normal and see if that does it. The tranny will learn your driving habits, and sometimes it's not always for the better. Depending on the mileage and age of your cayenne, you may be due for a fluid change, too.

PKN Member

PKN

Posted
Posted

rpcc - where are you situated? cold weather will force a start in first and may also account for jerky shifts while cold. Even here in Florida, my car will start in first if the temp gets below about 55 at night

Steve

bigbuzuki Member

bigbuzuki

Posted
Posted (edited)

It's normal for the transmission to start off in 1st gear when cold or when you select PSM switch to off.

Edited by bigbuzuki
rpcc Member

rpcc

Posted
  • Author
Posted
wrinkledpants - I tried that dme reset and it didn't change much.

I'm near Boston, so the temp as been well under 58 for a long time. It seems like a temp issue. It warmed up today and the problem was gone.

rpcc Member

rpcc

Posted
  • Author
Posted

Warm day today 65 - now it always starts in D2..... Should I warm the car up for a few if its below that???

rpcc Member

rpcc

Posted
  • Author
Posted

70k - on the car.

This can't be normal - I'm sure its not hurting anything, but its not normal.

mudman2 Member

mudman2

Posted
Posted

When the engine is cold, 1st gear start program runs to bring the cats rapidly up to temperature for emissions compliance. After the first period, few hundred meters or so it will end and the 2nd gear start program takes over unless overrided by turning off PSM as previously noted.

If the MY is early, 03-05 and PSM OFF does not result in 1st gear start then the Transmission control unit is not updated to the latest flash version

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