Diff. seal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chevelle454 · 06-18-2007, 11:20 AM

I have a 72 C20 and I would like to change the seal where the driveshaft goes in (pinion seal?) but I'm not sure whats involved. Do I just take the nut off that holds the yoke on and then pry the seal out? When I put it back together is there a certain torque spec? I heard of something called a crush sleeve, does that have to do with this somehow? Thanks

Scott

Chevelle454 · 06-18-2007, 05:22 PM

Anyone?

Sammy · 06-18-2007, 07:37 PM

I changed mine last month. Remove shaft, remove the nut (was really tight used a 24" 1/2 breaker bar) removed the seal. As far as torque, probally someone will have to chime in, I tightened the crap out of mine with the breaker bar. No leaks or problems since. Hope this helps you.

bedsled71 · 06-18-2007, 09:45 PM

i just changed mine over the weekend... i just marked the nut to the yoke. counted the treads and put it back to where it was marked... you might have to take the seal to the parts store because they had 3 dif. ones listed for mine... i had to use an impact gun because it was too tight for me to get off by hand

Chevelle454 · 06-18-2007, 10:26 PM

Okay I will try it and count threads like you said... Is the yoke pressed on?

Jim_PA · 06-18-2007, 11:10 PM

Quote:

Originally Posted by Chevelle454

Okay I will try it and count threads like you said... Is the yoke pressed on?

No, but I had to use a 2-jaw puller to get mine off. Could probably use a BFH, but I had a puller, so I thought there would be less of a chance of damaging something.

bills67 · 06-19-2007, 01:45 AM

I did one a few months back. Had to hold the yoke with a big forward/pipe wrench to keep wheels from turning when loosening the nut. Took alot of torqe to bust it loose, pretty simple after that.

Wreckless_71 · 06-19-2007, 02:33 AM

I just totally rebuilt my front and rear end for a frame up resto... The torque specs like 225 ft. lbs.! Deffinitly will need an impact

The seals the easy part just lube it all up and tap it in nice and easy trying not to bugger it up.

06-18-2007, 11:20 AM	#1
Chevelle454 Registered User Join Date: Aug 2003 Location: MN Posts: 380	Diff. seal I have a 72 C20 and I would like to change the seal where the driveshaft goes in (pinion seal?) but I'm not sure whats involved. Do I just take the nut off that holds the yoke on and then pry the seal out? When I put it back together is there a certain torque spec? I heard of something called a crush sleeve, does that have to do with this somehow? Thanks Scott __________________ 1972 C10 1972 C20

06-18-2007, 05:22 PM	#2
Chevelle454 Registered User Join Date: Aug 2003 Location: MN Posts: 380	Re: Diff. seal Anyone? __________________ 1972 C10 1972 C20

06-18-2007, 07:37 PM	#3
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: Diff. seal I changed mine last month. Remove shaft, remove the nut (was really tight used a 24" 1/2 breaker bar) removed the seal. As far as torque, probally someone will have to chime in, I tightened the crap out of mine with the breaker bar. No leaks or problems since. Hope this helps you. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629" Last edited by Sammy; 06-18-2007 at 07:38 PM.

06-18-2007, 09:45 PM	#4
bedsled71 Registered User Join Date: Feb 2007 Location: yuma arizona Posts: 448	Re: Diff. seal i just changed mine over the weekend... i just marked the nut to the yoke. counted the treads and put it back to where it was marked... you might have to take the seal to the parts store because they had 3 dif. ones listed for mine... i had to use an impact gun because it was too tight for me to get off by hand

06-18-2007, 10:26 PM	#5
Chevelle454 Registered User Join Date: Aug 2003 Location: MN Posts: 380	Re: Diff. seal Okay I will try it and count threads like you said... Is the yoke pressed on? __________________ 1972 C10 1972 C20

06-19-2007, 01:45 AM	#7
bills67 Registered User Join Date: Jun 2007 Location: south dakota Posts: 36	Re: Diff. seal I did one a few months back. Had to hold the yoke with a big forward/pipe wrench to keep wheels from turning when loosening the nut. Took alot of torqe to bust it loose, pretty simple after that.

06-19-2007, 02:33 AM	#8
Wreckless_71 Registered User Join Date: Apr 2007 Location: Kelso, WA Posts: 363	Re: Diff. seal I just totally rebuilt my front and rear end for a frame up resto... The torque specs like 225 ft. lbs.! Deffinitly will need an impact The seals the easy part just lube it all up and tap it in nice and easy trying not to bugger it up. __________________ 1972 K10 4" lift, 35’s, 383 stroker, 700r4, current project. 1971 C10 3"/5" static drop, 355/350. "La Bamba.” The current daily driver.



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