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Mod | | | Forums66 Topics128,142 Posts1,056,476 Members48,441 | | 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: Jul 2010 Posts: 21 New Guy | | New Guy Joined: Jul 2010 Posts: 21 | | | | | | Joined: Aug 2005 Posts: 1,186 Shop Shark | | Shop Shark Joined: Aug 2005 Posts: 1,186 | Probably not that old, what are the casting numbers on it?
Bruce | | | | | Joined: Jul 2010 Posts: 21 New Guy | | New Guy Joined: Jul 2010 Posts: 21 | There are none, But I have pics of all the parts that came out of it.
| | | | | Joined: Jul 2010 Posts: 21 New Guy | | New Guy Joined: Jul 2010 Posts: 21 | | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy hasson, it might be a 3/4 - 1 ton rear diff., used from the forties to the sixties. I can't see all the mounting holes in the pic. but the diff. I'm thinking of has ten mounting holes. | | | | | Joined: Oct 2011 Posts: 37 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2011 Posts: 37 | did they make a 10 or 12 hd rear end that came out the front i think it also had arear cover | | | | | Joined: Feb 2006 Posts: 1,867 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 1,867 | It looks like the standard 1 1/2 - 2 ton rear end used in a ton of years of both Chevy and GMC trucks. It doesn't have a specific name for that axle type.
What size truck did it come out of?
Jeff | | | | | Joined: Jul 2010 Posts: 21 New Guy | | New Guy Joined: Jul 2010 Posts: 21 | | | | | | Joined: Jul 2010 Posts: 21 New Guy | | New Guy Joined: Jul 2010 Posts: 21 | I found a 5.14 out of the same year GMC. Does anyone know if it will fit? | | | | | Joined: Feb 2006 Posts: 1,867 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 1,867 | If it came out of the same type of carrier, it should fit. There were a few slightly different axle housings that shared most of the same parts for the carrier itself. Some had different axle shafts and side gears but most of the time the carrier and ring and pinion gears were the same with the exception of Timken and other brand rear ends plus 2 speeds.
BE SURE to measure the backlash of the ring and pinion gears before tearing it apart. If the tolerances are reset back to stock those gears will whine and wear fast.
Jeff | | | | | Joined: Feb 2006 Posts: 1,867 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 1,867 | As I posted above, before realizing the actual ratio, if the carrier is the same, it should fit. Unfortunately the 5.14 is from a 1 ton truck and will not fit. The carriers look identical, but the 1 ton is much smaller. They did not make a 5.14 for 1 1/2 ton rear ends.
Jeff
| | | | | Joined: Jan 2010 Posts: 120 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 120 | The main pic is on its side- right? So that the crown wheel overload screw is facing up.
It looks identical to the one in my '47 1.5 ton (4100, more or less).
mine is MASSIVE, 12 inch crown wheel, 5.54 ratio, on an axle with 11000 lb springs and dual 7.00-20 wheels.
From what I know, (not much) all the big bolts from the early 40s to the mid 50s had the same unit with varying ratios, 5.54 and 6.11 were common.
No stampings, vague casting numbers between the top ribs.
Rich
'47 Canadian RHD 1.5 ton truck
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