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Old 08-07-2004
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I am: Christopher Hoehne
Join Date: Jun 2004
Location: Poteau, Oklahoma
Vehicle: 2001 Edge
Posts: 435
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So, when I did a hanger flip on my Edge I had a very bad pinion angle, and I heard of shims I could use. I tried looking these up and could never really find a diffinate answer to what they are or how to use them. I was just curious if anyone here has used them or knows how to. I finally put my truck back to stock height because the pinion angle was so bad I didnt want to trash anything to bad. Thanks for any replies.
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Old 09-01-2004
Join Date: Jul 2004
Location: Alta Loma
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What you are looking for are "Leaf Spring Shims" or "Axle shims" which go between your leaf springs and the perch on your axle. The shim is like a thin cheese wedge which will change the angle of your pinion in relation to the drive shaft. You can angle your pinion up or down just by turning the shim around. Axle shims come in different degrees and widths. most common are 2, 4, 6 degree and vary in widths from 2" to 3". First to determine which one you'll need, you have to measure how wide your rear leaf springs are. My guess would be around 2.5". Then you need to figure out what degree shim you'll need. This is the tough part because you'll have to expirement a bit to until the driveline is angled properly and the vibrations are gone. Since shims are relatively cheap, you could try starting with a 4 degree shim to see if you'll need more or less depending on the severity of the angle. The hard part is that you'll have to remove the center pins from your leaf springs (while compressed) and replace it by sliding the pin through the wedge, attatching it to the leaf spring pack. If you do not know how to take apart your leaf packs then you should consider taking your truck to a shop and have your driveline angles corrected by them.

Keep in mind the that the closer you get both angles on each end of the driveshaft, the less chance you'll have vibration problems (when accelerating).

Here's a site about axle shims!
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Old 09-01-2004
I am: Bob Jusnes
Join Date: May 2004
Location: Fuquay Varina, NC
Vehicle: 1996 Bronco
Posts: 3,048
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you shouldnt have to take the centering pin out of the leafs, most shims have a hole or slot in them to just sit under the leaves. you need to get the yokes of the tranny and the diff to be parallel, dont line up the the diff in line with the driveshaft, unless of course, the tranny is in line with it, which is doubtful
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