How do you replace the rear axle seals? - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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02-09 Vortec 4.2L I-6 Engine and Drivetrain Q&A forum for engine and drivetrain repairs/modifications/tuning.

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  #1  
Old 03-09-2009, 01:14 AM
CoyoteFireGuy's Avatar
CoyoteFireGuy CoyoteFireGuy is offline
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2004 Chevy TrailBlazer LS
Indigo Blue Metallic 4.2L I6 4X4
Join Date: Feb 2009
Location: Louisville, KY
Posts: 694
How do you replace the rear axle seals?

Ok, not sure if this is in the right are or not, so moderators feel free to move it. was replacing the breaks on my truck and realized that the right rear axle seal is just about gone and the left is leaking. I am pretty good with my hands but have absolutley no clue on how to replace this. Do i need to pull the entire axle? Can i just remove the hub? HELP PLEASE!!!
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  #2  
Old 03-09-2009, 09:29 AM
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bartonmd bartonmd is offline
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2007 Chevy TrailBlazer LS
Silverstone Metallic 5.3L V8 4X4
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If it's like my S-10, it's not REALLY bad, but can be kind of a job...

Parts:
- hub bearings
- hub seals
- NEW differential cross pin retaining bolt (manual on my S-10 says to replace this every time)
- 600 grit wet/dry sandpaper
- Diff cover gasket

Procedure:
1. Remove brakes
2. Remove diff cover
3. Remove cross pin retainer bolt
4. Tap cross pin halfway out, turn diff by hand, then pull it the rest of the way out.
5. Slide axle shafts in, and remove C-clips
6. Slide axle shafts out
7. Using slide hammer with axle bearing attachment (Auto Zone rents this), beat the snot out of bearings, pulling bearings and seals out
8. Using a big socket (or bearing driver), put in new bearings, then seals
9. Clean up the axle shaft (where and around where bearing rides) with oiled sand paper (this is just to keep the rust and such from cutting the new seal when you push the axle in farther than the old seal was riding, to put the C-clip on)
10. Oil up the axle shafts, and put them back in (being careful not to damage bearings or seals)
11. Put C-clips on, and slide axles back out to lock C-clips in
12. Put cross pin in, making sure to line it up with the retainer bolt hole
13. Put in NEW cross pin retainer bolt
14. Clean diff cover and mating surfaces
15. Using new diff cover gasket, put diff cover back on
16. Fill diff
17. Put brakes back on.
18. done.

Mike
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  #3  
Old 03-09-2009, 11:53 AM
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CoyoteFireGuy CoyoteFireGuy is offline
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2004 Chevy TrailBlazer LS
Indigo Blue Metallic 4.2L I6 4X4
Join Date: Feb 2009
Location: Louisville, KY
Posts: 694
Quote:
Originally Posted by bartonmd View Post
If it's like my S-10, it's not REALLY bad, but can be kind of a job...

Parts:
- hub bearings
- hub seals
- NEW differential cross pin retaining bolt (manual on my S-10 says to replace this every time)
- 600 grit wet/dry sandpaper
- Diff cover gasket

Procedure:
1. Remove brakes
2. Remove diff cover
3. Remove cross pin retainer bolt
4. Tap cross pin halfway out, turn diff by hand, then pull it the rest of the way out.
5. Slide axle shafts in, and remove C-clips
6. Slide axle shafts out
7. Using slide hammer with axle bearing attachment (Auto Zone rents this), beat the snot out of bearings, pulling bearings and seals out
8. Using a big socket (or bearing driver), put in new bearings, then seals
9. Clean up the axle shaft (where and around where bearing rides) with oiled sand paper (this is just to keep the rust and such from cutting the new seal when you push the axle in farther than the old seal was riding, to put the C-clip on)
10. Oil up the axle shafts, and put them back in (being careful not to damage bearings or seals)
11. Put C-clips on, and slide axles back out to lock C-clips in
12. Put cross pin in, making sure to line it up with the retainer bolt hole
13. Put in NEW cross pin retainer bolt
14. Clean diff cover and mating surfaces
15. Using new diff cover gasket, put diff cover back on
16. Fill diff
17. Put brakes back on.
18. done.

Mike
Thanks mike! While I really appreciate the detailed explanation this is a little out of my comfort zone so I will just take it to my mechanic and let him do it for the $160 he quoted me.

Brian
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  #4  
Old 03-19-2009, 10:45 AM
hblock72 hblock72 is offline
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2003 Chevy TrailBlazer LS
Summit White 4.2L I6 2WD
Join Date: Mar 2009
Location: NC
Posts: 4
bearings?

Hi guys,

I'm in the same boat. Just did a rear brake job yesterday and noticed a leak on the passenger side axle seal. I think I'm gonna tackle this job myself but was thinking I might as well replace both seals as well as both bearings while i'm in there. Any thoughts? I figure it can't hurt since they've got 210,000 miles on them.
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  #5  
Old 03-19-2009, 11:34 AM
10856 10856 is offline
Member
 
2003 Chevy TrailBlazer LT EXT
Dark Gray Metallic 4.2L I6 4X4
Join Date: Sep 2007
Location: Central NJ
Posts: 268
Quote:
Originally Posted by hblock72 View Post
Hi guys,

I'm in the same boat. Just did a rear brake job yesterday and noticed a leak on the passenger side axle seal. I think I'm gonna tackle this job myself but was thinking I might as well replace both seals as well as both bearings while i'm in there. Any thoughts? I figure it can't hurt since they've got 210,000 miles on them.
I have to pull the drivers side out for a bad seal, but I am just going to pull that one because with 90,000 miles on it, I am one of the if it ain't broke, don't fix it, keep us posted on your seal project
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