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Old 02-10-2010, 05:13 PM   #1
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44 pinion seal leaking

Hey guys great news! Just got done changing my diff fluid and went on a few trails and after washing her up saw my pinion seal is leaking! lol. So besides having to possibly having to change out my fluid again I was trying to find a thread showing how to change out the pinion seal but cant. Hopefully I can get better at using the search feature someday. But for now can anyone help me out? Thanks!

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Old 02-10-2010, 09:27 PM   #2
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Dang no help yet? I already got the drive shaft rebuilt with new u-joints just need to get the big nut off the rear u-joint. impacts not working. Guess ill just entertain myself on this thread

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Old 02-10-2010, 09:34 PM   #3
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I had my buddy/mechanic do mine. All I can offer is that it was no big deal for him....and use a quality new seal -Chicago Rawhide, which also goes by some other names.

And he didn't need to drain the fluid.
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Old 02-10-2010, 09:40 PM   #4
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Originally Posted by blacksport View Post
Dang no help yet? I already got the drive shaft rebuilt with new u-joints just need to get the big nut off the rear u-joint. impacts not working. Guess ill just entertain myself on this thread
you need get the nut off the u joint?

anyway, pretty straight forward, remove the pinion nut, tap the yoke off with a hammer, pop the seal out, make sure there's no burrs left anywhere, install the new seal, clean the sealing surface of the yoke, reinstall yoke.

the important part is reinstalling the nut. technically its a one time use nut. many people re use them, but i will not re use unless i use thread locker on the nut. tighten the nut to the same torque it was at, most people don't have a dial indicator torque wrench to measure the turning torque beforehand and to put it back the same, so most people wrap it tight with an impact trying not to make it tighter than it was. this is important because you can end up changing the preload on your pinion bearings, causing way more expensive problems later, and also repeat pinion seal failures.
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Old 02-10-2010, 10:00 PM   #5
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Lol ya thats the nut I ment! Gonna get a huge pry bar on it tomorrow!
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Old 02-11-2010, 10:37 AM   #6
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Ok so I cant get that nut off. I have tried my impact 4 times and also a 3 foot prybar. Am I missing something? I put it in 4high and in gear so that it only rolls so far I just cant seem to break the torque on it. Even still I need to find a couple pictures showing me how to change that seal out. Im a very visual learner. Any ideas,? would be sweet!
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Old 02-11-2010, 10:49 AM   #7
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Hey just saw a post on jeepforum that the guys said you jack up the axle (tires off ground) and the torque that you measure is the torque that it takes to turn the wheels (pinion) and you record that and torque it back plus 5 inch lbs? sound right? Dave from what you said I thought you meant record the torque when removing the pinion nut. Please help! this is my daily driver lol
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Old 02-11-2010, 12:09 PM   #8
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Correct me jeep gurus if I'm wrong. But I know in the dana 35c there is a crush collar on the back side of the yoke that determines the torque reading of the yoke with the tires off the ground. By this I mean how many inch pounds it takes to get the yoke to spin while the tires are off the ground. I am not sure if the dana 44 is set up the same way or not, but if it is that is how you measure it. In my case my pinion bearings were bad and I had to open the whole diff. and take out everything inside to replace the inner one, and I replaced my crush collar also. I had to use a 4:1 multiplier to get the collar crushed and the yoke set at proper inch pounds.
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Old 02-11-2010, 12:59 PM   #9
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Ok thanks man well hopefully one of the all knowing will pitch in his 2 cents lol. Its seems so simple I just dont want to mess it up.
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Old 02-11-2010, 05:45 PM   #10
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Originally Posted by gmercer308 View Post
Correct me jeep gurus if I'm wrong. But I know in the dana 35c there is a crush collar on the back side of the yoke that determines the torque reading of the yoke with the tires off the ground. By this I mean how many inch pounds it takes to get the yoke to spin while the tires are off the ground. I am not sure if the dana 44 is set up the same way or not, but if it is that is how you measure it. In my case my pinion bearings were bad and I had to open the whole diff. and take out everything inside to replace the inner one, and I replaced my crush collar also. I had to use a 4:1 multiplier to get the collar crushed and the yoke set at proper inch pounds.
you are correct, i skipped right over the 44 part and assumed we had a d35 here. so at least you don't have to worry about the crush sleeve and changing that.

since your impact isn't strong enough, you may wanna try using a huge pipe wrench to hold the yoke, position it so its turning against the ground so i will be held, and get a longer breaker bar, cheater pipe on it or whatever, you just need more leverage.
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Old 02-11-2010, 06:09 PM   #11
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ya ima try to tackle it monday when I have off. Should be good to drive in 4wd for a while. Its weird driving around with front wheel drive!

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