I concur with the above two statements. When I changed both of my front axle U-joints, I didn't do anything to the diff. Pull off the wheels, brake calipers (be careful of the brake lines), rotors, unscrew the hub assembly, and the axle shafts should slide right out. Just be very careful when you are pulling the shafts out (and putting back in), you do not want to tear the seal in the housing.
1997 Jeep Wrangler TJ - Red
2.5L 4cyl - 5 speed
33 x 12.5 x 15 Mastercraft Courser MT
10" Kicker Compvx Subwoofer
350W Kicker Amp
A big back seat for some fun with the lady friends