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Old February 27th, 2007, 12:58 PM   #1
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***hey axle guru's....a little help please***

I have a 75 D44 in my CJ that I am replacing all seals and bearings on....well during the disassembly process this is what I found:

On the DS there was an outer seal, open bearing and an inner seal

On the PS there was an outer seal, sealed bearing and no inner seal.

From what I read in my chiltons, if there are inner seals replace them, and if there are not, then dont because the bearing gets lubed from the diff fluid. well then why on earth would the sealed bearing not have a seal? I figure somewhere along the way somebody replaced the PS bearing with a sealed bearing.....

went to Napa to buy the parts (before disassembly) and their books called for a outer seal, open bearing and inner seal for each side..

what should I do? replace with the open bearings and inner and outer seals, or leave out the inner seals so that the open bearings can get lube from the diff?

I appreciate all help.


Last edited by gotsand?; February 28th, 2007 at 08:44 AM.
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Old February 27th, 2007, 04:20 PM   #2
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if your talking about hub seals then there should be a spindle seal & thrust spacer that the stub shaft passes threw. it what seal out water to the spindle support bearing in the tube of the spindle. then there are hub seals on each side that keep water out of the back of the hub. do not run with out. aside from that the only other seals in the axle are inside the tubes on either side of the carrier. you must remove the carrier assem. to replace. they seal to the shafts where they come in the tube to the carrier.
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Old February 27th, 2007, 04:22 PM   #3
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by the way is this the front or rear axle your working on? I gave the break down on the front axle.
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Old February 27th, 2007, 04:23 PM   #4
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sorry...rear
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Old February 28th, 2007, 06:35 AM   #5
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this is for a Dana 44 rear. I want to start reassembly, but would like guidance before I proceed....

thanks!!
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Old February 28th, 2007, 08:44 AM   #6
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Old February 28th, 2007, 11:29 AM   #7
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Never seen a sealed bearing for the rear. Are you sure it is not the race still connected to the bearing. Since they are sold as a set and the race has a snap edge. Maybe that one didn't pop. I have worked on both situations that you have.

If it does have the inner seal on the one side then I would put one in on the other side. These were meant to be lube by bearing grease since the gear oil never makes it to the with the inner seal. I like running this set up. I drilled and tapped a grease fitting on the axle housing between the inner seal and the bearing. I would pump it full of grease before going out to wheel (that was years ago).

Any ways you can use the set 10 bearing either way with or without the inner seal. If you use it with out the inner seal make sure that the bearing you are using is packed with grease from the factory. Or you hand pack it and then install. Since it takes awhile for the gear oil to bathe it. That way you don't take the chance of burning out a new bearing.
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Old February 28th, 2007, 11:38 AM   #8
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thanks KB, maybe it wasnt a sealed bearing, just kinda confused me a little that one side had an inner seal and the other did not, especially when the book says "if there is one replace it, if not dont" I just thought both sides would be the same.

the bearings I got from Napa came pre packed, but I put them in my packer and pack more in anyway. I think I will put in the inner seals on both sides.
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Old February 28th, 2007, 01:59 PM   #9
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If they are packed from the supplier than no you do not need to repack. Also if you don't do the grease fitting put grease inside the axle tub filling the space between the seal and the bearing race surface. That way the bearing will stay greased.
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Old February 28th, 2007, 02:33 PM   #10
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I got rid of my inners. I've seen it both ways on rear 44's.

I like KB's idea of packing between the seals with grease though.
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Old February 28th, 2007, 02:40 PM   #11
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yeah, I think I will do it that way

thanks again!!
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Old March 4th, 2007, 09:32 AM   #12
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some of the aftermarket replacement bearings for those 44's do come as a sealed ball bearing instead of the original tapered bearing cone and race. i would try and use the original style. i always ran without the inner seal. figured it would be less work than having to repack the rear bearings. never gave me any trouble.
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