Originally Posted by Jims_JK

So they took it back to the shop again last night and told me they were able to adjust the stock upper arm just a little bit because the bracket on the axle is slotted. To me it looks like they bored out the bracket hole so they could angle the pinion just a little. This did help the vibration but its still there from 3rd through 4th gear. Can any one tell me if that bracket is really slotted? I'm going to to be really ticked off of they just bored it out.