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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!
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| | | | Joined: Feb 2005 Posts: 469 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 469 | Appears to be a rear end from a 1/2 ton 55 to 59 chevy pickup could be a late model 54. | | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | '55 First to '59. If you can get the numbers that are stamped between the 2 bolts on the far right side of the 3rd memeber, we can pin it down for sure.
Bill Burmeister
| | | | | Joined: May 2006 Posts: 103 Wrench Fetcher | | Wrench Fetcher Joined: May 2006 Posts: 103 | well dang that's a let down! I've looked all over that rear and couldn't find anything close to numbers, just those lines on the sides of the 3rd member. If I were to stand in front of the rear looking at the pinion yoke, should the numbers be on the left or right? Thanks again,
Jeremy | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 |
Bill Burmeister
| | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | If it were a '55 2nd-'59 the mounts would be on top. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Oops, missed that little datail. Good eye cletus!
Bill Burmeister
| | | | | Joined: Jan 2008 Posts: 4,963 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,963 | Might be a spicer 1960 up with coil springs. | | | | | Joined: Feb 2006 Posts: 564 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 564 | '60-'62 Chevy truck used those rear ends too. If it's not the '55-'59, due to the spring perch location, then it's 60-'62, which is 6 lug, good and wide, has the brake line mount in the same location on the passenger side, and has the trailing arm perches on the bottom of the housing.
-Brad
SOUTHERN FALL GABfestOctober 6 ~ Commerce, Georgia Details here!Never Pee on an Electric Fence. | | | | | Joined: May 2006 Posts: 103 Wrench Fetcher | | Wrench Fetcher Joined: May 2006 Posts: 103 | I scraped and cleaned the whole pumpkin and found no numbers anywhere. The only thing I could find was on the brake cylinder it says:
"Delco
Moraine Prod
Dayton O USA"
I don't know if that even helps but there it is. I do beleive the guy I bought the rearend from had removed it from a '47-'53 truck but he had bought the truck like that. The leaf spring perches were poorly welded on by someone- not factory and have an extra hole drilled to center the rear in the fender, but I can find no other signs of other spring perches that were on there originally- coil or leaf. Thanks for the help! | | | | | Joined: Feb 2000 Posts: 769 Shop Shark | | Shop Shark Joined: Feb 2000 Posts: 769 | This sounds like a closed drive housing with a 55.2 differential installed. If the housing does not show any signs of ever haveing spring perches on top, they could have been removed very carefully. The reason I am thinking 55.2 and newer differential in an older housing is that the cover does not have a drain hole. I think 55.2 had a drain plug as well as the fill plug. | | | | | Joined: Jan 2008 Posts: 4,963 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,963 | At this point I would suggest pulling the punkin out of the housing and count the teeth. If it is a fast v8 automatic ratio, who cares where it came from. If it is a good ratio, this will help identify it. The punkin still looks Spicer to me. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | No drain plug on the '55-'62s, just the filler. It'sa slo definetly not a Spicer, those have integral housing instead of the 3rd member like this one.
Ratios will be one of 3 choices, std 3.90, or the 2 options, 3.38 and 4.10.
You may have to look closely to find the numbers, they usually aren't stamped very deep, and can get lost under a coat of paint.
Bill Burmeister
| | | | | Joined: Jan 2008 Posts: 4,963 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,963 | I stand corrected. I was thinking Spicer because because I have been looking for Spicer parts the last couple of days. I have one like the picture in my shop.
It's marked GM HO33. Mine is 3.90, 17 spline axle shaft. 3.38 was the automatic trans ratio. If you can't find numbers, count the ratio. | | | | | Joined: May 2006 Posts: 103 Wrench Fetcher | | Wrench Fetcher Joined: May 2006 Posts: 103 | I have to replace and rebuild everything with the brakes cause it is just trash and need to know what I have of course to get parts. I cleaned the whole 3rd member and found no numbers, just those lines and on the side a circle of dots about the size of a quarter with a larger dot in the middle- probable doesn't mean anything tho. I may pull the 3rd member tomorow then and see what I can find. Any ideas please let me know. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | The circle marking is the time/shift that the 3rd memeber was cast. After loking at your pix, it looks like the id numbers have been obscured by rust on the right side of the carrier, may not be able to decifer them.
Bill Burmeister
| | | | | Joined: May 2006 Posts: 103 Wrench Fetcher | | Wrench Fetcher Joined: May 2006 Posts: 103 | I pulled the cover off and the ring gear has 39 teeth and the pinion has 10 teeth and the ring gear is roughly 9" in diameter. On the outside of the ring gear I found:
3697702 10-39-GM 2 64 1 2-22
I don't know if that means anything but I'm hoping someone can tell me. I tried to find out the ratio by marking the yoke and drums and counting the rotations but must be doing something wrong. | | | | | Joined: Feb 2004 Posts: 29,871 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,871 | 10 X 39 teeth is a 3.90:1 ratio. Just divide the number of pinion teeth into the ring gear number.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: May 2006 Posts: 103 Wrench Fetcher | | Wrench Fetcher Joined: May 2006 Posts: 103 | Thanks Hotrod! Anyone know if the numbers on the ring gear mean anything? | | |
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