the proper angle on an sye..is the pinion yoke..pointing almost straight at the t-case yoke, a few degrees low is prefered, becuse of wrap at acceleration..i have an re-4" with an advance adaptors sye-(not the super short type) i kept in my 6* shim and the t-case/skid plate 1" drop in, to get the proper angle-no vibes~fly
i have a 3.5 black diamond, and although i figured a major benefit to the sye was gonna be the tummy tuck, i had to do what the guy above said exactly. 6* shims with a transfer case drop got it to where it needed to be. I am puttin on a 1" body lift, and 1" mml... i am hoping that will bring it closer, so i can at least have less of a transfer case drop, or in a perfect world, none at all =)
hope this helps too
and btw, every jeep is different... like, for real. so dont be surprised if you are just good to go striaght up liek you are, or if you have to reweld the perches. its a 50/50 shot
Like sentinal said. I have 3.5"s of lift and run 1 inch shackle. 8° shims worked perfect for me. Best way to do it is to go out and buy a cheap angle finder for about 10 bucks, measure the pinion angle, then measure the driveshaft angle. They should be identical, assuming you have a cv shaft, and are still running the dana35. If you are running an axle with any sort of offset, different degrees are necessary.
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