Tranny shift problems - smooth shifting vs. terrible shfting - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-30-2008, 02:07 PM   #1
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Default Tranny shift problems - smooth shifting vs. terrible shfting

93 SE bonnie 118,000 miles

I'm not sure if this is a tranny problem or sensors regulating shifting between the engine and tranny.

Here'* the behavior - some days the car will shift at the proper shift points thru 1-2-3-OD and also downshift smoothly when the gas pedal is depressed - and show good pickup speed at downshift. The next days the shift points are way off - shifting from first to second to third is way off - engine RPM'* very high before shift occurs and shifts are rough/jerky. Especially overdrive shift - very violent shaky shift into OD - once in OD engine/tranny shakes the car for maybe 3 or 4 minutes before smoothing out.


Any thought?
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Old 04-30-2008, 02:29 PM   #2
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This could be related to this issue:

http://www.bonnevilleclub.com/forum/...ic.php?t=97782

Update that thread with this info. Let'* try to fix your issues one by one. A lot of these could be interelated.
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