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Hi everyone, i ve just bought Ford ThunderBIrd 1994 LX v8 4.6, My car vibrates a lot inbtween 35 and 65mph, also when it vibrates my RPM needle drops and while its vibration if i release the accelerator and repress it , its all goes fine. Anyone know what is the real problem. someone told me its te transmission and someone else informed me its the driveshaft.........
 

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J.Miller said:
I would start by checking the transmission fluid.
:zwthstpd:

You prolly need to change tranny fluid (use Mercon V).
The drive shaft issue usually presents itself as a resonating vibration somewhere between 60 and 80, depending on whose car is it. That's a defect that can only be fixed by driving slow (not gonna happen) and changing the DS. But I agree with JM. It's prolly that the torque converter needs new fluid in it.
 
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