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08-24-2017, 07:16 PM
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#1 |
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Registered User
Join Date: Jan 2017
Location: North Dakota
Posts: 37
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Pinion seal replacement
I need to replace the pinion seal on my '66 C20 because it started leaking and after searching I have found a number of different ways people say to do it. Does anyone know the proper procedure to replace the pinion seal on the HO52 rear end?
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08-25-2017, 03:47 PM
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#2 |
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Registered User
Join Date: Jan 2017
Location: North Dakota
Posts: 37
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Anyone?? I just need to know if the nut torque will affect the pinion bearings in this eaton rear end.
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08-25-2017, 04:58 PM
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#3 |
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Moderator
  
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Pinion seal replacement
http://67-72chevytrucks.com/vboard/s...ad.php?t=81726
and http://67-72chevytrucks.com/vboard/s...d.php?t=392527
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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04-27-2019, 01:44 PM
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#4 | |
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Registered User
Join Date: Sep 2017
Location: Cayuga Wisconsin
Posts: 34
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Re: Pinion seal replacement
1966chevyc20, were you successful in performing this? I need to do this also. Thanks.
Quote:
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1972 K20 2004 Chevy Aveo 2011 BMW X5 Diesel 2018 Chevy Silverado Diesel  U.S. Air Force Retired - 1983-2017
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04-27-2019, 05:04 PM
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#5 |
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Registered User
Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,283
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Re: Pinion seal replacement
Mark it with paint before you take it apart.
Clean and dry the splines, light coat RTV on the splines and some RTV behind the washer. Loctite on the nut threads. Return it to the same spot (couple of daka-daka's on the impact, not much). It actually takes a LOT of force to compress the pinion crush sleeve at all.
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1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, turbo, LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate |
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04-27-2019, 08:13 PM
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#6 |
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Registered User
Join Date: Dec 2017
Location: Niceville Florida
Posts: 347
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Re: Pinion seal replacement
I did exactly what SkinnyG said and it worked great.
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04-28-2019, 07:45 AM
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#7 |
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Registered User
Join Date: Jan 2013
Location: Calgary Alberta
Posts: 1,170
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Re: Pinion seal replacement
A guy sold me an 82 Jeep and I found out rear seal was leaking in the AMC20 because the nut had backed off. New seal and nut and nut staked and good to go. Saw the guy in a store and he exclaims "Pinion seal" and walks away. I think someone had told him his rear end was shot.
I also changed the seal in the 12 bolt that's in my truck now. No more leak. |
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04-29-2019, 01:38 PM
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#8 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
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Re: Pinion seal replacement
The 20-30 series does not use a crush sleeve. It has a spacer between the brgs. You can do what Skinny says or tighten the nut to about 200 foot lbs. & on to the next cotter pin hole. The seals are on the inner side of the flange. You can remove the 5 bolts & the flange & replace the seals. There is a thick cork gasket between the flange & housing. you need to replace it or use a thick coating of RTV.
george |
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