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How Hard Is This To Fix?

02silveradols

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02silveradols Enthusiast

02silveradols

Posted
Posted

I noticed this leaking when I changed my oil today. What do I need to do in order to fix this. It seems it would be an easy seal but not sure how hard it would be to get to and whether I loose all my transfer case oil when I do the seal. Any help would be great. Thanks

 

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bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted

You shouldn't lose any transfer case lube but the front diff is going to have to be drained. Mine are doing the same thing and I hope to get around to it in the very near future.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
Thanks for the reply. How hard do you think it is? And what kind of fluid does it take? Thanks again

 

Not sure how hard it's going to be just yet although I do think there are a few threads around here that discuss changing the front axle seals. GM uses standard 80w90 gear oil in the front diff although some people choose to go back w/ synthetic.

Rolling Enthusiast

Rolling

Posted
Posted

On an 04 you should expect to have to remove the tube extension if you are changing the passenger seal. The driver side stub shaft should pop out with a deadblow, its only got a snap ring holding it in. Definitely change the fluid!!!!!!!!!!!!!!!! Take a very good look at how the gears and bearings inside move and how much resistance they have. The diff side bearing lock retainers like to break and back off the side bearing preload allowing the front diff to howl and prematurely wear out bearings and gears.

half ton axle seals# 15801507 left and right are the same. There is no gasket between the case halves or tube, just permatex anaerobic sealant. Goo it up and squish em together. Hope this helps!

02silveradols Enthusiast

02silveradols

Posted
  • Author
Posted

What is the passenger tube extension? I talked to someone and they said I should also replace the snap ring. Is there only a snap ring on the drivers side? That side seems easy enough, it is the passenger side that I'm confused on. I just put new wheel bearings in it about 6 months ago too and didn't notice this. Thanks again

Rolling Enthusiast

Rolling

Posted
Posted

T010060.gif

#6 is the passenger tube

#3 (two times, both sides) are the axle seals

the little part between #3 and #4 on the bottom right hand side of the pic, just above the CV shaft is the snap ring. I do not believe they need to be replaced when pulling the shaft, unless they break or have lost tension.

You will at minimum have to partially remove the differential from the vehicle. Not easy to do on the ground. Still kinda difficult to do on a hoist! If you are doing both sides, I would plan on removing the diff and tearing it down on a bench, easier to move around.

P'cola Denali Enthusiast

P'cola Denali

Posted
Posted

If you are mechanicaly inclind and have the print out for the shop manual, and HAVE THE RIGHT TOOLS!!! Its not to hard to replace the seals and pull a chunk. Figure a weekend and a case of Pabts Blue Ribbon.

  • 5 months later...
korbin502 Enthusiast

korbin502

Posted
Posted

Hey, just wondering how this operation went for you. I just started doing the drivers side of my 01 2500HD along with the wheel bearings. I am having more trouble with seized bolts than ever. I had to call it an evening when it got too dark and lubed all of the bolts hoping that tomorrow will bring an easier disassembly. Tell me, what special tools did you need and how did it go.

hockeypro1411 Senior Enthusiast

hockeypro1411

Posted
Posted
Hey, just wondering how this operation went for you. I just started doing the drivers side of my 01 2500HD along with the wheel bearings. I am having more trouble with seized bolts than ever. I had to call it an evening when it got too dark and lubed all of the bolts hoping that tomorrow will bring an easier disassembly. Tell me, what special tools did you need and how did it go.

 

Get some PbBlaster, a torch, an impact gun, a case of beer (your choice on variety), a swear jar, and a bolt extractor kit. If the impact eventually strips off the heads you can always weld another nut on top of the stripped one and go at it again.

Starrman Enthusiast

Starrman

Posted
Posted

I had mine done at the dealer about 2 years ago and it cost $350. I dropped it off in the morning and picked it up that evening

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