RPM bounces up and down shifting into 4th [Archive] - GrandAmGT.com Forum


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10-07-2004, 09:36 PM
Right after I unplugged the battery, the car shifts fine at all gears, but as the computer learns the way I drive, RPM jumps up and down when it's trying to shift into 4th. I give it more gas and it finally shifts. Any ideas?

10-07-2004, 10:23 PM
is it possible ur tranny is slipping?


10-07-2004, 10:23 PM
Is it acutal issues with the gear change, or is it just torque converter lockup?

10-07-2004, 10:29 PM
It's not slipping. The car just hesitates to shift into 4th until I press the gas more.

10-07-2004, 10:35 PM
maybe wait for it to finish its learning and see if it continues

10-08-2004, 06:18 AM
Its like its holding third, hmm. Thats pretty weird, your sure its not a Torque converter lockup thing?

10-08-2004, 06:21 AM
My trans never shifted right for at least a gas tank or two after a reset. Give it time, if it still does it, sounds like something with the tc lockup, have it serviced/flushed/etc..

10-08-2004, 05:04 PM
Ok, help this tranny newbie. How exactly does TC lockup work and how is it related to tranny fluid? I was planning on trany flush. My car only has 50k miles, but it's driven pretty hard. The car has been driven through so many gas tanks for a long time.