vibration after acceleration

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Mar 18, 2006 | 01:32 AM

dallas lewis

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Joined: Dec 2005

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vibration after acceleration

Hey guys,

I'm not really sure what the deal is, but I just developed a vibration in what feels like the front end. I didn't really do anything, just kinda punching the gas at times. Anyway, it happens when I let off the gas. It's as smooth as can be while I have my foot on the gas, but as soon as I let off it vibrates. Any ideas?
BTW- 93 302 E40D 4x4(definitely not the 4x4 though, it hasn't been used in who knows when)
Thanks

Mar 18, 2006 | 01:48 AM

Bdox

Fleet Owner

Joined: Sep 2005

Posts: 28,609

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From: Lake Tahoe, Nevada

Check front wheel bearing adjustment. Also look at how your front tires are wearing for clues.

Mar 18, 2006 | 06:27 PM

scurbiedog

Senior User

Joined: Mar 2005

Posts: 256

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From: B.F.E.

Check you "u" joints thier tight when you put pressure on them "accelerating"then can "slop" around whe nyou let off.

Mar 19, 2006 | 11:59 AM

greystreak92

Lead Driver

Joined: Sep 2002

Posts: 9,182

Likes: 12

From: Gateway to the West

Its the double-cardon U-joint at the front of the rear driveshaft. I'd be willing to put money on it. When the spring and centering ball begin to lose their ability to maintain the proper driveshaft angle, the front of the D/S drops slightly causing the vibration when the driveshaft is NOT under load with forward torque applied.