Info on Loud Transmission Clunk at high idle - 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 07-27-2003, 11:56 PM   #1
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Default Info on Loud Transmission Clunk at high idle

I have a '92 SSEI, and if I rev the engine while in park, I get a loud clunk that sounds like someone hit the engine with a hammer. After some research, I was told that GM had some problems with the overrunning sprag in some models, and it sometimes catches when in park. The car actually tries to move a bit when this happens.

I was also told, JUST DON'T DO IT. Apparently it can trash the tranny if you keep doing this.

So, I don't rev the engine, and no harm is done !!!!!!
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