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Old 11-24-2011, 02:31 PM
doc hays doc hays is offline
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Default Pinion Seal Leak

I noticed an oil leak from my 2003 dodge ram 2500 rear end. Did some checking and found it was coming from the pinion seal.I was told I'd need a seal and new torque pinion nut to do this job.
Are there anymore secrets I need to know before I tackle this job?

Tools needed and sizes would be a great help. Thanks,Doc
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Old 02-11-2012, 07:23 PM
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I had my front diff pinion seal fixed under warranty. Sorry, I dont know much about it.
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Old 02-11-2012, 08:11 PM
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It's been quite a few years since I've had to do a pinion seal. You are correct in that you will need a new seal and crush sleeve. If you can get your hands on a manual for your truck get the torque spec for setting the crush sleeve and procedure for checking backlash. It's not a tough change or fix however it does need to be done correctly or you stand the chance of chewing up the diff.
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Old 02-13-2012, 07:16 PM
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Another option, and if ever faced with a leaking pinion seal, the route I will take. The dealer charges around $100 or so to do this. To me its worth it to not lay on my back fighting with breaking that nut loose and trying to keep everything just right.
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Old 02-14-2012, 11:29 AM
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I find that if you put a socket wrench or breaker bar on the nut and chock the wheels and put the park break on you can loosen the nut by putting a floor jack under the handle of the wrench or bar and jacking up the handle. The best part is you can use this to do the reverse procedure to tighten the nut and the best part is that you can with the jack tighten it very slowly, if you use a traditional impact gun you risk over tightening. You don't have to replace the crush sleeve but it's certainly recommended. As long as the pinion's rotational torque comes out around 15-20 inch lbs your alright. Of course that torque is measured without the axle shafts installed.
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