Oldsmobile/pontiac Rear axle/differential identification
#1
Oldsmobile/pontiac Rear axle/differential identification
Hi,
I have a Model T Coupe hot rod that appears to have an Oldsmobile or Pontiac rear. I think its 40's 0r 50's. A friend said it is dated as 11/4/57. thinking maybe 47 so since late month, a 48 or a 58 rear but ?? . I just cant find another picture that has certain things such as the square boss above the date code, near top right rib and there is a fill plug on backside which I dont see anywhere. Also backing plates for brakes have a partial outer lip, not full lip all the way around. Can anyone help me? I want to do bearings, seals, brakes etc....
Thank You,
I have a Model T Coupe hot rod that appears to have an Oldsmobile or Pontiac rear. I think its 40's 0r 50's. A friend said it is dated as 11/4/57. thinking maybe 47 so since late month, a 48 or a 58 rear but ?? . I just cant find another picture that has certain things such as the square boss above the date code, near top right rib and there is a fill plug on backside which I dont see anywhere. Also backing plates for brakes have a partial outer lip, not full lip all the way around. Can anyone help me? I want to do bearings, seals, brakes etc....
Thank You,
#2
Is there another number ( 6 digits ) on the housing?
It sort of looks like a 57 thru 64 rear, but that number would tell us for sure.
That number you show is a date code and decodes as follows.
K== October
4= 4th day
7= year , could be 1937 or 1947 or 1957
Is it a posi?
If it is, then It's a 1958
It sort of looks like a 57 thru 64 rear, but that number would tell us for sure.
That number you show is a date code and decodes as follows.
K== October
4= 4th day
7= year , could be 1937 or 1947 or 1957
Is it a posi?
If it is, then It's a 1958
Last edited by Charlie Jones; January 24th, 2024 at 07:49 PM.
#3
Is there another number ( 6 digits ) on the housing?
It sort of looks like a 57 thru 64 rear, but that number would tell us for sure.
That number you show is a date code and decodes as follows.
K== October
4= 4th day
7= year , could be 1937 or 1947 or 1957
Is it a posi?
If it is, then It's a 1958
It sort of looks like a 57 thru 64 rear, but that number would tell us for sure.
That number you show is a date code and decodes as follows.
K== October
4= 4th day
7= year , could be 1937 or 1947 or 1957
Is it a posi?
If it is, then It's a 1958
#6
Need better pictures and an axle spline count would help a ton.. Pinion yoke area... it is not a 1957 Olds or Pontiac. casting just does not look like that...I have plenty of them to reference...The casting fins are just wrong...BUT it is close so that is why it might be a 1947 ...BUT I do not even have a CLUE what a 1947 olds rear looks like at all . The yoke will help ID the era a bit. 1957-1964 Olds will have a full 1/2 saddle for the u joint to sit in. The older 56 and older the saddles are shallow and not very good as the u bolts are the only thing that really hold it stable back them...Just technology and design got better because the vehicle were getting more and more power.
Backing plates are really old type they have not 90 degree outside diameter ledge for the drum to seal out the elements. They are just flat again putting it in the 1955 and older era.
OLDS Pontiac 1947 ?
Backing plates are really old type they have not 90 degree outside diameter ledge for the drum to seal out the elements. They are just flat again putting it in the 1955 and older era.
OLDS Pontiac 1947 ?
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lunaboy
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December 28th, 2023 01:49 PM