Hey guys I bought some leveling shackles that would bring down the rear 2". After the install I now have a vibration from the drive shaft at 25mph to 30mph. I know the problem is that I changed the pinion angle. On all my Jeeps I have adjustable suspensions that I could set the angle with but not on my 07 fx2 screw. What gives? Anyone else have this issue. I did go ahead and put the factory ones back on but hate that I wasted $50

 

http://www.summitracing.com/parts/SPS-86255

 

Put in a set of 2 degree shims and you should be fine. I bought a set when I put mine in but my pinion angle was still within specs so I never used them.

 

Where did you get the shackles?

 

I forget the name of the shackles. Sounds like shims are the way to go. thanks for your help guys

 

I got my shackles from ebay. 2" Beltech for $40.