Front differential oil seal leaking like a faucet. - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 10-20-2002, 07:26 PM
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Front differential oil seal leaking like a faucet.

How hard is it to get the Main Nut off. Tried to loosen it but would not budge. Can I put heat on it? Is it hard to get the seal out? Please advise...Thanks Ralph P
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post #2 of (permalink) Old 10-20-2002, 07:44 PM
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Re: Front differential oil seal leaking like a faucet.

By the main nut description I'm thinking you are talking about the pinion nut. You can use an impact wrench to remove it, but get a new one to replace it. The heat would also probably help, just don't cook the seal if you use the heat. Also depending on what type of axle it is the preload might need to be reset on the pinion gear after taking the nut off.

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post #3 of (permalink) Old 10-20-2002, 07:57 PM
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Re: Front differential oil seal leaking like a faucet.

The diff is model 30. I am going to replace the seal. What do you mean that the preload has to be reset? Thanks for your help. Ralph P
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post #4 of (permalink) Old 10-20-2002, 07:57 PM
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Re: Front differential oil seal leaking like a faucet.

The diff is model 30. I am going to replace the seal. What do you mean that the preload has to be reset? Thanks for your help. Ralph P
post #5 of (permalink) Old 10-21-2002, 12:03 AM
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Re: Front differential oil seal leaking like a faucet.

The D30 uses shims so no problem with a crush sleeve. The pinion nut should be on there at about 260 Ft-lbs, which is about as tight as you could get it by hand with a cheater bar (we broke a torque wrench in half on the last D44 pinion nut we tightened). It also means it'll take something similar to remove it. When you get it off and the seal changed out, retorque it to 260 ft-lbs again and check the pre-load, it should be 15-25 INCH pounds for the original bearings. If it isn't you'll need to add or reduce shims.
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