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Old 05-10-2008, 08:28 AM   #1
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Pinion Nut Question from a NOOB

Hey guys great forum The Better half came home yesterday complaing of a hot smell on her 05 Wrangler. I looked and looked. Ended up cleaning the engine compartment scrubbing down the battery posts (cause they needed it) etc etc. Was just getting ready to tell her it was her imagination when I saw a piece of plastic bag hanging down underneath. A trashbag full of grass clippings had wrapped itself around the driveshaft. No big deal I thought. So I start peeling this mess off and I get about 3 layers into it and the rear diff oil starts running out By the time I get the bag completely off I have a steady stream of oil (what a crappy seal to fail that easy!). Anyway I run and get a new seal and some gear oil. I go to loosen the Pinion nut and it did not have any significant torque on it. I replaced the seal, serviced it up and I tightened the pinion nut as tight as I could get it with the rear tires in the air and the parking brake on. After a couple of searches here I find that the nut is supposed to be a one time use item so I will have to take it back apart today to give it a coat of loctite. I am a gearhead but on bikes and Helicopters but I know almost zero about Diff's. So my question is about the proper torque value on a dana 35 pinion nut. I understand that for a complete rebuild it is part of the gearing setup right? But for a job like this what do you recommend?
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Old 05-10-2008, 08:37 AM   #2
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there is also a crush sleeve in there. when the pinion nut is torqued to spec the crush sleeve puts the proper amout of pressure to the pinion. Was the pinion nut loose? if it was your crush sleeve may need replaced but i dought it.




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Old 05-10-2008, 08:48 AM   #3
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As for the torque spec.... this is also debatable....because of the crush sleeve.
Before you take the pinion nut off you should of marked it with something and the pinion itself so as to get in back to where it is supose to be. If you do this you dont have to worry about torque spec just mark nut/pinion, pull nut off replace pinion seal and replace nut to where it was.

If you did not mark the pinion nut posistion on the pinion before you removed it you will probally have to pull it back off and get a new crush sleeve from the dealer and pinion nut. Place crush sleeve around pinion under the seal , replace pinion seal , and replace pinion nut and torque to factory spec.

note; the crush sleeve is alumiun and if tightened to much or to less it may cause damage/ leaking from pinion seal.

hope this helps.

and i'll have the factory torque spec for the 2004 D35 pinion nut in a few minutes for you.
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Old 05-10-2008, 08:59 AM   #4
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from the FSM (full service manual) for 2005 Jeep Wrangler.

Tighten pinion nut to 271 N·m (200 ft. lbs.).
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Old 05-10-2008, 09:19 AM   #5
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Yea the nut was definetly not torqued to spec. It was nowhere near 50 ftlbs let alone 200. I got it off with very little effort so your thoughts about the crush sleeve being damaged/bad make sense. She that drives the Jeep is out doing groceries right now but when she gets back I will have to tear it apart again.

I gotta say that I really liked the design of the replacement seal I got from Napa vers the OEM style. The OEM was a metal outer ring with a sealant applied to it. The Napa had a metal outer ring but also had rubber like a Garloc seal on the outside edge. Any opinion's on that?
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Old 05-10-2008, 09:21 AM   #6
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[QUOTE=Whiskerfish;227742]The OEM was a metal outer ring with a sealant applied to it. The Napa had a metal outer ring but also had rubber like a Garloc seal on the outside edge. Any opinion's on that?[/QUOTE]

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Old 05-10-2008, 10:48 AM   #7
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Thank you for your help!!!

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