Since we have 2 Jeeps, we bought that special seal tool installer ($45) so you don't waste 3 seals trying to pull one in. With the tool, the first seal goes in perfect less than 1 minute. As stated, be sure tio check for play in the bearing for the inside axle shaft. Otherwise if that inside axle shaft is wobbling due to a bad bearing, that outer axle is going to wobble too, which will make the seal to leak.
90 YJ, 4.2 with 2150 carb 4.0 Head and headers, Nutter with TFI and MSD. 1" BL, 2.5" spring lift, 33", Goodrich KM Mud Tires. Dana 30 w Aussie, Ford 8.8 w LS. 9000lb HF Winch.