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Discussion Starter #1
Hey guys, new member. First post.

I got a 2009 Colorado LT, Ext.Cab, 4x4, 2.9 4-cyl, automatic, 76k miles, original owner, Inferno Orange.

Last weekend, I changed the passenger front diff axle seal because a oily residue had formed around the base of the CV axle and a local shop told me it was likely a failing seal, but they don't do that kind of work as a matter of policy.

Half a week later, the residue is back and I'm trying to figure out what i did wrong. I don't have the time or luxury to easily get back under there again until the weekends. No drippings or puddles (yet), just a visible residue.

I used a SKF seal, pounded it in as far as it would seemingly go using exhaust piping. I cleaned the hole and put dielectric grease around the outer lip, new gear oil on the inner lip, and new gear oil on the shaft, as per How-To's on this site and the Haynes manual. Then buttoned in all up with the original axle and a new SKF wheel hub for good measure.

I don't have a way to post pics yet, but the oily 'ring' before and after formed around the base of the CV shaft where it butts up to the diff housing. And I'm not even enitrely sure if it isn't just residual oil being flung out from when I greased it to reassemble. The old seal definitely looked worn when I popped it out.
 

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I had a good friend of mine that works in a local mechanic shop change out both of mine at about 135K...
Been clean since... He said it probably needs done about every 100K...
Good luck with the fix !!!
 

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Have same problem on mine... Replaced 2 a while ago... One side is dry, other side still leaking...

I am thinking that there must be a small buildup of rust on the CV joint shaft that goes into the differential which is causing the seal not to seal properly... Next time I have the truck apart for repairs I am going to put a new axle in.
 

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I am sure that any kind of debris would cause the seal to fail... Maybe a good cleaning could resolve the issue without buying a new axel... I would also change out both sides... If one is going bad the other one can't be far behind.... IMO
Again... Good luck with the fix !!!
 

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Yeah, I know... guy already tried to smooth it off with sandpaper, but I think there was still a ring of rust causing issues.
 

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That sucks... Maybe time for a new one....
 

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Discussion Starter #7
The original CV axle was still very clean. I hit it with degreaser and wiped it down real good. I'm just hoping the oily residue is excess oil from lubing it just prior to installing it.
 

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Discussion Starter #8
OK so I took it apart again today. Seal lip looks good. Pounded on it a couple times just to make sure it's fully seated.

But then, I looked at the CV axle. The axle as a whole is fine. The shaft surface that mates to seal however is horrible pitted and grooved. I'd hate to toss a perfectly good axle just for that.

Again, no pics available.:emoticonwithoutpics
 

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OK so I took it apart again today. Seal lip looks good. Pounded on it a couple times just to make sure it's fully seated.

But then, I looked at the CV axle. The axle as a whole is fine. The shaft surface that mates to seal however is horrible pitted and grooved. I'd hate to toss a perfectly good axle just for that.

Again, no pics available.:emoticonwithoutpics
You might try a Speedi Sleeve.
 
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