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I did the inner axle seals on my rockcrawler that has a D60. If you decide to replace them I would buy a couple extras as I went through several until I made a wood circle cut to the right size to help tap them in. You have to remove the differential, but it is not that bad. I used a twisted up rag and ran it between the pinion and ring gear to pop the diff out. Make sure you mark the bearing caps as they have to go back on the same side etc.
The most difficult part of the whole deal was installing the seals. It is difficult as there is no real way to tap them in straight unless you have a tool.
There are also some comapnies making seals for the outer tube near the knuckle if you do a lot of driving in mud or water. These seals keep water and mud out of the tubes.
Tapping is not required, use a long piece of 1/2 inch threaded rod. By using various combinations of washers inside and outside the differential, you can pull and push the seals in and out of place. Total investment, maybe $25 for the rod and all the various sizes of washers.
Thanks for all the help. i think i'll check the level to make sure it's not overful, then clean it up real good and drive it (in and out of 4wheel) then if it's leaking i'll tackle it. Thanks so much!
well, thanks for all the help on this one. i know what to do when it ever goes out. get this... i checked the level, and right now it's perfect. i cleaned the wet oil off the axle and dust seal, and took it for a 4x4 drive. not long, but i ran in high and low on gravel. no more oil. I bet it was like one grat person said, the lube shop used pressure and blew it past the seal. the bank (it is a repo) took it to shell lightening lube, they also had 4 tranny pan screws in a row loose. idiots. glad i know better to trust anyone else, i check my truck's out before and after i buy, even for things that are not so obvious.
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