I have a stock TJ sport with the Dana 35 rear. How can I figure out whether I have 3.07 or 3.73 gears or something else? I've read that there are two different cases (low or high) for the 30 and 35, and this limits what gears can be used in that case.
04-20-2008 09:01 PM
Check the rear diff for a metal army looking tag. It should say on there. Its usually on the left side of the diff mounted on the bolts that hold the cover.
If its a manual sport there is a very good chance of you having the 3.73
04-20-2008 09:08 PM
Put your transfer case in neutral, jack up the rear, and spin a tire. Count how many times the driveshaft makes a rotation for each tire rotation.
If you sping the tire one rotation and the driveshaft turns almost 4 complete times, you have 3.73's.