HELP
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Junior User
Joined: Oct 2010
Posts: 81
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From: Port Republic NJ
HELP
i put a set of 3" blocks in the rear of my 96 ford bronco, and im getting a horrible vibration in the rear. the blocks were off-set a 1/32". were did i go wrong. i have a bad feeling its my drive-shaft. the front has a leveling kit.
im sitting on 31 10.50 15 s. i really need help on this one guys.
im sitting on 31 10.50 15 s. i really need help on this one guys.
New User
Joined: Mar 2011
Posts: 15
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From: oregon
i wouldnt assume the drive shaft right off the bat...especially if it wasnt doing this before the lift blocks. have the tires been rotated recently? balanced? what makes you think the driveshaft is the issue? all nuts and bolts properly torqued down? u joints in good condition?
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Junior User
Joined: Oct 2010
Posts: 81
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From: Port Republic NJ
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Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
You say it stops when you let the truck coast? I'll bet dollars to doughnuts that the double-cardon u-joint at the front of the rear drive shaft is the culprit. However, if they were all new three years ago, I'd be concerned that adding the blocks put your driveshaft geometry off. Every lift I've ever done has kept the factory shims at the very least. Unless the blocks you added are tapered to compensate for the change in geometry, this may be the root of the problem.
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Posting Guru
Joined: Oct 2009
Posts: 1,540
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From: Southwest VA
Greystreak is right.......the blocks would need to be tapered to remove the stock shims......if they are tapered , you didn't put you blocks on backwards did you ? pinion angle should be increased...... Post up some pics for us to take a look
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