Looking for some help identifying stamping numbers on 55-64 rear axle carrier units There appears to be 2 sets of numbers one appears to be a date the other could also be a date Anybody know how or have a chart to decode See Pictures (sorry for the duplication) Thanks
How sure are you that it's a 55-64 Chevy differential? The numbers look very ****er, to me. And the October 1968 date...not quite 55-64, is it?
Jim Thanks That's what I figured about the date but wasn't sure about the manufacture Do you know how they stamped the OEM units from 55-64 ? looking knowledge on the early rear carriers or a source to determine dates and any other info from stamping and cast numbers Thanks again Jim
Looks like a Dana Power Lok to me. Remember Chevrolet Service sold over the counter parts for many years after the model year run. I have a set of 55 to 64 4.88's dated 1970 and marked with a Chevrolet part number.
The Chevy parts book that covers these cars shows a Dana (****er) number 22212X for the 57-64 4.11 and 4.56 differential case. So...I still don't know.
more confusion... https://www.chevytalk.org/fusionbb/...39/hl/positive+traction+rearend/fromsearch/1/
If you can contact DZAUTO (Tom Parsons) over on ChevyTalk.Org, he'll know, as these rear ends are just one of his specialties. Ask him directly via a PM, rather than through one of the forums; he's not real happy with some of the Tri-Five members, and I can't fault him there; he will answer a PM. Be sure to include your photos. He's a good guy in my book, extremely knowledgeable and helpful.. I am Butch/56sedandelivery.
Does it have 17 spline side gears? A picture of the whole carrier ***embly would help us to help figure this out. Does it say Arma Steel on the outside of the ring gear flange?
Don't know if this would help or not but worth a look perhaps http://www.348-409.com/differential.html
Thanks I will contact Tom There appears to be several choices as far as corporate units and aftermarket and not sure if GM sub out the carrier or manufactured them in house good information to know when at a swap meet or online looking some are close in appearance but wrong for the application Any and all information is greatly appreciated Thanks Wayne
Well, just to add insult to injury, (and confusion), my spare appears to be made Sept. 6, 1961, if I'm reading it correctly. With a completely different part number yet again. As far as I can tell, improvements were made and new part numbers were ***igned but it's hard to be sure. After 55 years, god only knows what pieces have been swapped from one unit to another. I have a tendency to believe all of these treasures we come across are untouched originals, when in reality they have been repaired numerous times. Here's some pics, so you can compare what you have, to what is probably, a mish-mash of warranty repairs. This one has seen better day's. [emoji41] Hope this helps and doesn't confuse things even further. Jedd
B 9 61 sounds to me like Feb 9th, 1961. And there is another post on the internet somewhere that mentions the 22159X number as being for a 55-64 chevy rear. The ring gear dated 10 73...interesting, I guess they replaced it when the pinion lunched into the case?
Like I said, its a conglomeration of ****! Thank you for deciphering the date code, they get kind of confusing sometimes.
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