2004 Buick Lesabre Transmission jumps

2004 BUICK LESABRE
139,000 MILES • 6 CYL • FWD • AUTOMATIC
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KERMIITT
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  • 1 POST
When starting out going into first and second sometimes it shifts hard. It seems to do it after it warms up
Feb 28, 2010 at 8:13 PM
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2CARPRO JACK
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  • 11,533 POSTS
Might be a shift solenoid issue, like it is getting sticky or something to that effect.You can try having the PCM scanned for trans codes, they wont always set a light if the trans is still working ie; shifting. Some GM trannies needed valve-body updates that had to do with harsh shifting, you might want to call a local trans shop and ask them about it.
Mar 2, 2010 at 8:29 AM