I have this rhythmic thrumming vibration driving past 50-55 mph. You can feel it in the steering wheel and, well, the entire car. Seems to go away when I let off the gas and come back when I get back on the gas. Any ideas?
Edit/Update: I just moved the car to wash her and the same rhythmic thrumming vibration (though slightly less felt) can be felt with the car in park and holding the engine to a certain rpm (feels about the same rpm as cruising at 50+ mph). I have no tach, so I cant be sure. This is with the car in park and not moving at all, so the driveshaft wouldnt be spinning. Any ideas now?
BTW, I'm not sure how the trans mount looks, and recently I changed the drivers side motor mount because it broke, but did not change the passenger side motor mount. The passenger side motor mount and trans mount are original to the car. The vibration was being felt prior to and after changing the motor mount...
1968 289 Coupe "Sally"
2002 GT Vert "Sasha"
Last edited by VANILLA_GORILLA; 01-26-2013 at 09:05 AM.
Drive train. If the u joints aren't new, go ahead and replace them. If it still persist after that, check the drive shaft angle at the rear end and at the transmission. They should be equal and opposite.
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