shaking around 30-40mph

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Mar 6, 2007 | 11:41 AM

broncojoseph

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shaking around 30-40mph

Have a '93 Bronco 5.8 with OD transmission. This last week the truck started shaking between 30-40mph, not below or above those speeds. Only seems to shake when accelerating, not when coasting at those speeds. Any ideas? Thanks.

Mar 6, 2007 | 01:34 PM

lostin90s

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From: Central PA

Check u-joints .They are under more stress taking off. If was bad tire it should show up both accelerating and coasting . Good luck

Mar 6, 2007 | 01:50 PM

sivart

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From: west michigan

I just went through that a couple of weeks ago. It turned out to be a u-joint on the rear drive shaft up near the transfer case. I had to stick a small pry bar in there to actually find it because it felt OK when I checked it by hand.

Mar 8, 2007 | 09:44 AM

broncojoseph

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The tie-rods, u-joints, and ball-joints were all checked out and tires were rebalanced. Still shaking, also at 50-65mph hear kind of a rubbing noise. The shaking and noise only occur when giving it gas, not when coasting. Could it be a motor mount or transmission mount?

Thanks - Joe

Mar 8, 2007 | 10:28 AM

poffutt

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Joined: Jan 2005

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From: Houston

Check the U-joints again. It has to be that.

Mar 9, 2007 | 12:51 PM

peppersfords

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From: Sunnyvale, CA.

I had the exact same problem. It has to be the U-joint. when you checked the Ball Joints was there any movement?

Also (possibly), if it was the tires that needed rebalancing...the tire tread could be "cupped" try rotating your tries.