Angled Shims?

[moparfreak77]

I have a 95 Cherokee Country with a 3" lift in the front(stiffer coils) and 2 1/2" in the back(longer shackles). I would like the back up an additional 2" but when I put lift blocks in it, it vibrated to much for my liking. What degree of shims would I need to stop the vibrating if I put the lift blocks back in? I do not want to use add-a-leafs. Can I lower my tranfer case 1" with no problems such as linkage binding or shifter interference with the console? Thanks

moparfreak77@hotmail.com[addsig]

[balloo93]

This guy has the equation to use to figure out what degree shim you'll need:



http://www.dirtroad.com/articleb.htm



I don't think droping the case about an inch will mess with things too much. I plan on doing that myself to compensate for the AAL I put in the rear leaf packs. Everyone I have talked to that has done it didn't have anything negative to say about it.[addsig]

[MudderChuck]

Double check the blocks to see if they have a built in wedge, most do. Lowering the transfer should help straighten out the driveshaft some. Check the rear bushing in the transfer for slap or side play, it might be a little loose which is aggrivated with the increased angles. Also slightly worn U-joints will act up with increased angles. I´ve heard it recommended the angles between front U-joint and the rear should be as equal as possible, I´ve been racking my brain for the allowable U-joint angles, and can´t seem to bring them to mind. A max of 7 degrees from stock pops to mind, but I could be wrong. By putting in the longer shackles you´ve already rotated the differential some. [addsig]