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changing my differential seal.

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Old Nov 23, 2007 | 01:29 PM
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Default changing my differential seal.

im getting ready to change the seals on my differential. ive noticed some oil mostly on the drive side. im planning on using cajundude write up http://www.cajundude.com/differential.htm. so my question are...

1. what seals do i need? ive read that there are inner and outer seals? i want to change all of them while everything is taken apart.

2. does anybody know what the part # are on these?

3. once i get everything off to the bare diff. how do i access the seal. is there a lid that just pops out? i dont think its mentioned on the write up

4. what kind of gear oil is recomended? i have about 67k on the car (not sure if it matters) im kinda leaning towards redline or royal purple.

any tips would be greatly appreciated
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Old Nov 23, 2007 | 02:03 PM
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Call your local GM dealer. Have him/her email or fax you an parts explosion W/description page. Select the numbers you want to change. My experience is C-5 axle leaks are common, and aftermarket (Will Fit Seals) arn't always up to the challange, one other beifit is, if the great gods @ GM feel they have a problem you will automatically get an updated part.
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Old Nov 23, 2007 | 02:59 PM
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Hi Mickey -

Try Cajun's differential seal replacement page instead of the differential R&R page you linked to -

http://www.cajundude.com/outputshaftseal.htm

The seal part number is not listed, but I am sure you could tell any decent parts counter person you want differential seals for a C5 and they will give you the correct parts.

best regards -

mqqn
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Old Nov 23, 2007 | 03:07 PM
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I believe Cajundudes site links to mine.. where I have the part numbers listed:
http://mikemercury.home.att.net/342.htm

(near the bottom of the page in red)
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Old Nov 23, 2007 | 03:09 PM
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Originally Posted by Mike Mercury
I believe Cajundudes site links to mine.. where I have the part numbers listed:
http://mikemercury.home.att.net/342.htm

(near the bottom of the page in red)
Hi Mike -

Thanks for posting that - your site is another great source of info - I have used it a few times.

Thanks !

best regards -

mqqn
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Old Nov 23, 2007 | 04:10 PM
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Originally Posted by mqqn
Hi Mickey -

Try Cajun's differential seal replacement page instead of the differential R&R page you linked to -

http://www.cajundude.com/outputshaftseal.htm

The seal part number is not listed, but I am sure you could tell any decent parts counter person you want differential seals for a C5 and they will give you the correct parts.

best regards -

mqqn
Originally Posted by Mike Mercury
I believe Cajundudes site links to mine.. where I have the part numbers listed:
http://mikemercury.home.att.net/342.htm

(near the bottom of the page in red)
thanx
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Old Nov 23, 2007 | 04:22 PM
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correct me if im wrong but i only need numbers 3 & 5?

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Old Nov 23, 2007 | 04:33 PM
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here are some pics of how bad it looks





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Old Nov 23, 2007 | 11:07 PM
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that does look bad
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Old Nov 24, 2007 | 01:32 AM
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When I did mine a couple of months ago I got new GM output shaft seals, new o-rings for the covers and I used the GM red anerobic sealant as well. The biggest problem I had was the stud in the driver's side cover that mates to the transmission. I couldn't remove it to save my life using the double nut method, I ended up destroying it with a pair of vice-grips and just replacing it. Heating it with a torch would probably have done the trick, but of course I didn't have one available at the time. Just a little FYI.

BTW, the tube of anerobic sealant is sold in two sizes; a small one for about $8 (which is all you will need) and a larger tube for about $28 (which conveniently is all they had when I was there).

Justin
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Old Nov 24, 2007 | 11:39 AM
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Originally Posted by Skinny Kid

BTW, the tube of anerobic sealant is sold in two sizes; a small one for about $8 (which is all you will need) and a larger tube for about $28 (which conveniently is all they had when I was there).

Justin
nice tidbit of info.
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Old Nov 24, 2007 | 01:35 PM
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Hope it helps Mike.
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Old Mar 7, 2008 | 06:35 PM
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nice thread!
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