Intimidatorz34 Posted July 3, 2004 Report Share Posted July 3, 2004 I am getting a vibration (the entire engine seems to shake) when I start the car, step on the brakes as its coming to a stop, and when it shifts into whatever gear around 55 mph. I would think it to be a lower engine/tranny mount but not sure why the entire front would shake when it is in this gear. (and its not alignment, etc.) Any Ideas? The upper mount is a new (5k miles) polydogbone. And if it was a tranny, I wouldnt think that it would shake when in park. Then again why is it shaking so bad in that certain gear unless its at a certain resonance. There arent any codes and the timing belt is fine. Quote Link to comment Share on other sites More sharing options...
god910 Posted July 3, 2004 Report Share Posted July 3, 2004 The "whatever gear around 55" is your 4th gear. 4T60 shifts like so: 1,2,3,TCC,4 Does the shake go away at a higher speed? If so what is it? If the shake changes w/ speed, I'd say tires. I've even seen brand new tires do it, just a bad tire. (My buddy had 4 sets put on his truck before they got a set that didn't shake. They were pretty cheap, but you get the idea.) Quote Link to comment Share on other sites More sharing options...
Intimidatorz34 Posted July 3, 2004 Author Report Share Posted July 3, 2004 I havent had the nerve to go above 60 with the vibration....it suddenly started so I know it isnt the tires, because they havent been touched in 1k miles. Plus the engine is vibrating while it is in park. Quote Link to comment Share on other sites More sharing options...
Baddflash Posted July 3, 2004 Report Share Posted July 3, 2004 Hows the engine running? Possibly trans/conv related, I've heard similar problems and it was broken/missing flex plate/conv bolts. Is there any problems shifting? If it only does it at higher speeds it may be something with the TC lockup. :?: Quote Link to comment Share on other sites More sharing options...
Intimidatorz34 Posted July 3, 2004 Author Report Share Posted July 3, 2004 It shifts fine The motor just shakes when it is in park too. Quote Link to comment Share on other sites More sharing options...
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