Rear D44 pinion seal replacement - JeepForum.com

 
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post #1 of 13 Old 07-07-2014, 02:04 AM Thread Starter
kjjohn95
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Rear D44 pinion seal replacement

So, in addition to my weird clicking brakes and possible bad cv axle, I also have a leaky rear pinion seal. I'm pretty sure I have the Dana 44 (its a 4.7 w/ quadradrive). I plan on doing it myself, but I'm not sure which seal to buy. Morris 4x4 has two: http://www.jeep4x4center.com/pinion-...5012847aa.html and http://www.jeep4x4center.com/pinion-...-44-47885.html. Which one is it? Also, will a 230 ft-lb electric impact gun be able to remove and re-tighten the pinion nut? I plan to measure preload before I do it as well.

Edit: I have driven around for quite a while with low diff fluid. If it leaks to the bottom of the seal then stops leaking, is there still enough fluid inside to safely lubricate the diff?

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post #2 of 13 Old 07-07-2014, 12:15 PM Thread Starter
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post #3 of 13 Old 07-07-2014, 06:43 PM Thread Starter
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post #4 of 13 Old 07-07-2014, 09:21 PM
stone white 99
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Your impact will work on removal only.
I did an outer front pinion seal on the front axle and had good results by marking the nut and pinion threads with a scribe. You have to tighten the nut to as close as where it was before. I used a mega pipe wrench to hold the yoke and a big azz breaker bar to tighten the nut. 50k miles later the pinion and ring gear are still happy.
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post #5 of 13 Old 07-07-2014, 10:31 PM Thread Starter
kjjohn95
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Ok, sounds good. Which seal should I buy out of the two above? They look different, but on the dana 44 exploded diagram they show as the same part.
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post #6 of 13 Old 07-11-2014, 04:17 PM Thread Starter
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Does anyone have an answer to my first question? I really don't want to buy the wrong seal.
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post #7 of 13 Old 07-11-2014, 08:11 PM Thread Starter
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Anyone? I really need to know before I order this.
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post #8 of 13 Old 07-12-2014, 01:17 AM
Thomahawk
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You know you have the Dana 44A (aluminum), right?
Wranglers uses the Dana 44,,,
AND its NO GOOD for your diff to be running low on fluid IMO.

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post #9 of 13 Old 07-12-2014, 12:24 PM Thread Starter
kjjohn95
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I know that it's not good for it to be low on fluid, I am keeping it topped off until I replace the seal. Do you know which of the seals that I listed above is the right one?
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post #10 of 13 Old 07-12-2014, 12:52 PM
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Sometimes pinion seals are difficult to track down, as far as getting the right one. I'd either give that company a call or go to a local parts store and look for a National seal or other good brand. Then if its wrong you can take it back, with the old one and match it up to what you need.
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post #11 of 13 Old 07-12-2014, 01:13 PM Thread Starter
kjjohn95
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Okay, none of my local parts stores have seals for the dana 44, I may just order both seals on Morris 4x4 or quadratec, then return the wrong one
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post #12 of 13 Old 07-22-2014, 10:49 AM Thread Starter
kjjohn95
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Okay, I have one more question. I just replaced the seal, and torqued the nut until it measured about the same rotational torque in inch pounds that it was before. My only question is: does the rear dana 44a in the wj have a crush sleeve? I've heard a lot of people say that 44s have shims instead, but on the Morris 4x4 diagram, it shows a "collapsible spacer"
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post #13 of 13 Old 07-23-2014, 02:37 AM Thread Starter
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