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Mod | | | Forums66 Topics128,089 Posts1,056,004 Members48,430 | | Most Online14,466
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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| | | | Joined: Dec 2005 Posts: 547 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 547 | I was checking all my brakes and front bearings out before summer started and found my rear brakes to be oiled and gummy, again. First time I thought it was my wheel cylinders, so I replaced them. Well I definatly can smell the gear oil now. I already have seals and bearings so I thought I would just go ahead and replace those. I wanted to know how one may test the axle vent/valve to make sure it is working? This isn't the first time this axle has done this. My brother redid the seals and stuff once before already. I just want to do this right and make sure I won't have to do it again, for a long time at least. Any advice or suggestions, please bring them! Thanks for the help!
58' 3200 235 3-speed/OD
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Look closely at the seal area on the axle, they are commonly pitted. There is a speedi-sleeve available to fix this problem.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The vent is on top of the axle housing. It has a little cover over it. If you can turn the cover it is OK.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Apr 2007 Posts: 1,038 'Bolter | | 'Bolter Joined: Apr 2007 Posts: 1,038 | I had a similar situation on my '51 AD where I had begun to get gear oil on one rear brake. After driving it and having one wheel drag, I pulled the drum and saw oil all over. Curious as to whether I had lost a lot of oil I opened the fill plug on the differential and to my surprise, got a puff of air (I had just returned from a drive and the diff was warm). Of course, that caused me to examine the axle vent, where I found it was completely sealed by crude and corrosion. I cleaned it up with a little gun solvent and then cleaned up my shoes and drums with brake solvent and have never had a problem since. I didn't have to replace seals or shoes.
The vent is just a 1/8 pipe thread on my AD. Check it out, maybe you can get lucky, too, and your seals might be OK.
Kent | | |
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