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Old 09-09-2017, 09:09 PM
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Axle expert needed, seals, rear, leaks?

I just had a PR44 installed in the front of my 2013 Non rubi JK. All is well there.
I had my mechanic reconfigure my rear D44 NON rubicon axle with Tenfactory chromaloy 35 spline shafts ( MG22158) and an ARB air locker 35 sp. He used a Motive Gear Master Kit (Motive Gear Dana 44 Master Overhaul Kit Rear - JK Manufacturer Part # RA28RNJKMKT)
I have a diff fluid leak on the drivers side? Could there be some issue with the Tenfactory 35 Splines? Is there a different seal we should have used?
I put about 30 miles on it and then went into low and locked the front and rear. I crawled slowly up my street for 100 feet and began smelling fluid. The mechanic also said he had a leak a day earlier but it seemed to go away. Well I guess it really didn't. Hes 1n hour and a half away.
My thought is to replace the seal on that side and see what gives. A seal is only 17 bucks, some diff fluid and some time I guess. Any thoughts folks?

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Old 09-13-2017, 07:08 PM   #2
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It shouldn't be a spline issue. Either it is overfilled or the seal got tweaked when the new axle shafts were installed. Your plan sounds good as long as you can do it correctly and you don't want to hold the mechanic responsible.

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Old 09-14-2017, 08:49 AM   #3
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Seal on the rear is a PITA due to the long shaft. You have to press off the retainer and the bearing to get to it. If you have a super long shop press and the right size pipe it shouldn't be too bad.

If it is already tweaked that is an install issue. Honestly if he has the equipment and you don't have it available, I'd have him do it for nothing and spend the driving time.

seals are really easy to screw up...as you already know.
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Old 09-14-2017, 09:00 AM   #4
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One of the keys to axle seals is to use a gear lube friendly sealer around the metal lip that gets pressed into the housing, and a good smear of grease around the rubber lip and the area around the shaft where the lip will end up. Some don't use a sealer, some use a generic RTV, both are not great options. I have used a product called the Right Stuff by permatex for many years and have not had an axle seal leak since.
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Old 09-14-2017, 12:36 PM
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Quote:
Originally Posted by Lee H View Post
One of the keys to axle seals is to use a gear lube friendly sealer around the metal lip that gets pressed into the housing, and a good smear of grease around the rubber lip and the area around the shaft where the lip will end up. Some don't use a sealer, some use a generic RTV, both are not great options. I have used a product called the Right Stuff by permatex for many years and have not had an axle seal leak since.
You have to be quick with that but it seems like a good idea to me. I am going to get a can. Thanks.
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