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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jan 2011 Posts: 144 Shop Shark | | Shop Shark Joined: Jan 2011 Posts: 144 | '51 3100
After pushing my rolling chassis out and back into the garage I noticed a couple drips of oil below the rear end. It is coming from the bottom bearing retaining screw. I don't think this was leaking prior to tear down of the truck. I did previously pull the diff. cover and replaced the gear lube but have not touched the rear end otherwise. Any idea why this would start leaking? I am not familiar with the mechanics of these adjusting screws. Can I remove this screw to put on some thread sealer? It appears to be on the oil-side of the seal, so I guess I'll have to drain the diff. to do it. Since it's an adjusting screw can I just remove and reinstall it without messing up the adjustment? The manual says "Install three tapered lock screws and draw them down evenly and tightly, then tighten lock screw nuts." Can I remove one only and then reinstall to same tightness?
Dave www.fallenherosdreamride.orgall give some MY SON GAVE ALL The fallen hero's dream ride is a 1951 Chevrolet 3100 with original 216 In memory of LCpl Phillip Vinnedge USMC KIA 10/13/2010 Afghanistan
| | | | | Joined: Aug 2008 Posts: 88 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2008 Posts: 88 | I've only completely rebuilt one of these rear diffs. But I recommend you loosen each nut evenly so the bearing doesn't load more to the side of the tightned nuts. Then tighten each back up evenly. Likely won't make a difference but I would follow the manual to be sure. | | | | | Joined: Aug 2008 Posts: 88 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2008 Posts: 88 | Dave, very cool project and a most worthy cause. Many of us lost loved ones in the wars and your project helps honor their sacrifice. Good luck. | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | If it's what I'm thinking just remove it, clean the screw, put some Permatex #2 on the threads, and reinstall.
If there is oil behind it put your shop vac on the axle vent while performing the procedure, keeps the oil from running out.
Grigg | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | Now that is a good trick. I am going to remember that one! | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Works quite well. Used it on an oil drain plug saturday. | | |
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