At highway speed my car shakes very badly.

2005 HYUNDAI ELANTRA
156,000 MILES
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BCLVR1234
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When going over 45 mph the car starts shaking, if I let off of the gas or put it in neutral it stops shaking.
I had the tires checked and balanced. Had new struts installed. Same issue. Took car back and they found a bad axel seal. This was a tire place. I think it may be the axel or drivetrain? I would think if it was the axel it would still shake if the car is in neutral? Any thoughts?
Feb 13, 2012 at 6:45 PM
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CADIEMAN
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check the run runout on the rims.it checks the rims also check all the motor mounts.
Feb 13, 2012 at 6:52 PM
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BCLVR1234
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they said Motor mounts looked ok. I would think they checked the rims
Feb 13, 2012 at 6:58 PM
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RIVERMIKERAT
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Not necessarily, bclvr. Check the transmission mounts as well. The trans seal will not normally cause the problem you have. However, an internal transmission problem can.
Feb 16, 2012 at 2:09 AM