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Correcting Rear End Angle

6K views 33 replies 11 participants last post by  DirtyDog 
#1 ·
Installed a set of pro comp leaf spings on the front and back of my stock Jeep 1988 YJ only to find that my rear end is now sitting at too much of an angle.

I am told I am needing a part that corrects this angle so my drive line straightens out again and so my Jeep doesn't vibrate.

Can someone give me a link to the product I need to correct this problem at Quadratec, Amazon, or some other website?

I am told it is called a shim, but all I am finding is shims for leaf springs and nothing to correct the angle of the rear end.

The Pro Comp Springs I installed are these:
http://www.amazon.com/s/ref=nb_sb_n...omp+51423+Black+Powdercoated+Lift+Leaf+Spring
 
#34 ·
Okay, took the YJ by the shop yesterday and the owner put an angle finder to it. He said everything was almost dead on and, he didn't recommend shimming at this point.

The guy who checked it does quite a bit of work on race cars, and he seemed very knowledgable on drive shafts and angles b/c he has to customize drive shafts all the time. He didn't even charge me anything to look at it.

I think he said it was 85 degrees at the transfer case and 83.5 degrees at the rear axle, and he explained how those angles cancel each other out which the article talked about.

I didn't feel any vibrations either driving over there, so hopefully my U joint holds up. So, for now, I will just leave things be and if I have to put a shim under there, I am fairly certain 2 degrees would be the most I want to use. Thanks all for your help.
 
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