Clunking when shifting at WOT

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Mar 21, 2006 | 03:13 AM

viper1

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Clunking when shifting at WOT

After a few performance upgrades (Lid, filter, and Magnaflow muffler) there is a clunking when going WOT at each shift like someone is banging a hammer underneath the car. The car was bone stock before and did not have this problem. There was a noticable SOTP difference after the install. Any ideas? Is my tranny about to go? It's a stock 4L60e by the way.

Mar 21, 2006 | 03:17 AM

BlackHawk T/A

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From: Lincoln, NE

Tranny mount?

Mar 21, 2006 | 03:21 AM

85Regal350

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From: W.Warwick, RI

is it a transmission sorta noise...like does it clunk when shifting or just clunk at WOT. Is there anything loose under the car? Id check the trans fluid before anything.

Thats all i have for advice..im not so good with transmissions.

Mar 21, 2006 | 03:37 AM

viper1

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Quote:

Originally Posted by 85Regal350

It's just at WOT. Otherwise it is like normal.

Mar 21, 2006 | 05:39 AM

85Regal350

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From: W.Warwick, RI

well from the sounds of it i wouldnt say a bad transmission....someone with better experience could correct me if im wrong...but i think that you have something thats flopping around under there under heavy throttle...could be a tranny mount....check for anything loose under there....my bet is something is just flopping around wacking something under the heavy acceleration.

Mar 21, 2006 | 07:49 AM

pSSycotic

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From: Houston,TX

ya prob tranny mount...mine did that...get under ur car look at the mount u can usually look at it and see that its cracked/broken... its just a 25$ part thats pretty easy to fix