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Old 11-13-2013, 06:58 AM   #1
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Bad shakeing while accelerating

Hey guys, I got a 91 YJ Wrangler and it is acting up. When accelerating somewhere around 30mph and on the whole car starts to shake and vibrate. Now when I let of the throttle it stops the shaking and coasts with no problem. What could it possibly be? I feel like it is something inside the driveline. Maybe transfer case. And is it safe to drive? Any ideas?

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Old 11-13-2013, 07:03 AM   #2
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Did you check the universal joints? That's where'd I'd start had a dodge Dakota that would be fine then about 35mph it would shake so bad I'd bounce around on the seat.

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Old 11-13-2013, 07:09 AM   #3
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What is the universal joint exactly
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Old 11-13-2013, 07:18 AM   #4
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On your rear driveshaft there are 2 of them they look like an "+" and it's the point on each side of the shaft where it pivots.

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Old 11-13-2013, 07:18 AM   #5
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U -Joint in the drive axle is the first place to start.
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Old 12-02-2013, 10:02 AM   #6
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U-joints/driveshaft damage
Broken engine/trans mounts

Auto or Manual transmission?
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Old 12-02-2013, 09:40 PM   #7
Guesses a lot ;)

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Old 12-02-2013, 10:29 PM   #8
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My buddy has a ford explorer that had the same symptoms. His driveshaft was shaking around due to broken bolts. Check around underneath to see if everything's in shape.
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Old 12-03-2013, 06:20 AM   #9
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I had this problem about a month ago, checked the u-joint and was all good, was checking the oil at a gas station and noticed one of the spark plug wires had come off, plugged it back in and no more shaking.
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Old 12-06-2013, 07:36 AM   #10
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I just fixed this same problem..I thought it was a bad ujoint...turns out it was just a loose strap bolt..
threw some lock tite on it,torqued it back down along with rest of the bolts..no more shaking..

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