I'm new to the forum but have been doing research for awhile. I have 99 tj 4.0l, 5 speed auto with 68,000 miles. I have a four inch pro comp lift with 33x12.5 BFg all terrains. Dana 30 front Dana 35 rear with 3.73 gears. Engine is 4.0l with I want to put a super Dana kit on the rear and regear both to 4.56. Can anyone give me a good close estimate on how much it will cost in labor to do the regear?