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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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| | | | Joined: Aug 2007 Posts: 610 Shop Shark | | Shop Shark Joined: Aug 2007 Posts: 610 | I trying to identify the rear end in my 52 3/4 ton. I was very close to being able to drive it around the yard and went to bleed the brakes and the bleed screw snapped off (at least it made me think of spraying the other side with PB-Blaster). Since the truck had been sitting for 10 years I decided I might as well change out the wheel cylinder. The problem with that is I don't know what this rear came from. Previous owner said the guy before him put a nova rear in. He had so many trucks I can't trust his word. Its a GM 12 bolt, number cast into the housing on the front passenger side is NF3896838. Cast number on the other side is GM 60. Stamped on the front top of the passenger side axle tube is THB W166 1 E. I did a search in google for the cast number, a few things came up, a few chevy trucks in the 60's to 70's range. Some pictures to help http://i175.photobucket.com/albums/w124/rockfan1815/rear%20axle/PIC00012.jpghttp://i175.photobucket.com/albums/w124/rockfan1815/rear%20axle/PIC00011.jpghttp://i175.photobucket.com/albums/w124/rockfan1815/rear%20axle/100_0980.jpgThank you for any help you can offer | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | How many lugs? If it has six lugs I'd say a 60's 1/2-ton truck...
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Mar 2006 Posts: 319 Shop Shark | | Shop Shark Joined: Mar 2006 Posts: 319 | I believe the THB W 166 1 E sequence decodes as THB = 1971 1/2 ton 3.07:1 ratio (3.73 was standard, 3.07 optional) W = Warren, Mich (plant) 166 = June 15 (166th day of year) 1 = Dayshift E = Eaton positraction differential Found the THB reference here: http://www.americanclassic.com/paint.htm?p1=axlesUsed the site sequence example for 71 and later axles to decode the rest: http://novaresource.org/axle.htm
"Nothing astonishes men so much as common sense and plain dealing." - Ralph Waldo Emerson
| | | | | Joined: Aug 2007 Posts: 610 Shop Shark | | Shop Shark Joined: Aug 2007 Posts: 610 | Thanks guys
ordered my wheel cylinders | | |
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