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Discussion Starter #1
Hey guys I just did a 3inch rsk on my 95 f250. I basically followed what brad did for the rear and put 5inch tapered ready lift blocks in the rear. Now when I take off I get a driveline shimmy. I have a extended cab longbed so I am assuming I need to shim my carrier bearing to take bring everything back in line. My question is how thick of a shim do I need or is it going to be a trial and error thing trying different thickness shims?
 

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Waitin' on 500
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i think rule of thumb is 1/4'' for every inch raised.
 

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You will most likely have to space down the carrier bearing 3/4's of an inch and put in a 5" non tapered rear block. You're pinion shaft rotates up when you throttle on it. It should be a few degrees on the low side as in the pinion shaft is closer to the ground. A friend of mine just went through this.
 

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STILL LEARNING
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By shimmy, do you man the rear axle is moving side to side, or that you feel a vibration? under acceleration?

If a vibration under acceleration, then you are experiencing axle wrap. I fixed mine with traction bars. no more vibration under acceleration
 

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Discussion Starter #5
I mean when I take off I feel a shake but its just taking off from a stop. When im going at speed its fine.
 

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I mean when I take off I feel a shake but its just taking off from a stop. When im going at speed its fine.
Traction bars will fix that. The added leverage form the 5" block is why you feel it. It now wraps the springs
 
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