Drivetrain vibration on deceleration - MustangForums.com



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Old 12-31-2010, 06:33 AM   #1
pc_mechanic
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Default Drivetrain vibration on deceleration

When I let up on the accelerator It seems like the driveline is vibrating as if it is out of balance. 99 3.8L w/automatic transmission.
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Old 12-31-2010, 12:58 PM   #2
RyansQuick6
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Sounds like it may be ujoints
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Old 01-01-2011, 06:22 PM   #3
NeoTokyo
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My U joints are starting to go bad and thud when I let off or when I am at a stop and let off the brake.

So +1 to Ryan.

I am just waiting to swap driveshafts to an aluminum one, I will replace them then.
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Old 01-02-2011, 11:22 AM   #4
mustangman02232
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crawl under the car and see if you can wiggle the drive shaft, if there is play its u joints, there cheap and easy to do if you have the right tools, or it could be something as stupid as a weight falling off the drive shaft
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