Hot Rods Help i.d. rearend

It's an Olds/Poni. 61 od. 53 id. Number stamped ?28518. Iam thinking early 50s.
It was under my uncles drag car 32 5 window in 50s
Thanks in advance.

 

Not Olds/Pont. It has shackles for a transverse spring. Must be Ford manufactured. Maybe late 40's Lincoln??? It has bolt on emergency brake brackets like Lincolns

 

What's the wheel bolt pattern?

 

Looks like task force Chevy truck to me -

 

5on 5it was under my uncles 32 5 window drag car .

 

Ding ding ding!!! I think ididntdoit1960
Has it. Heavy duty chevy truck.
Now I need to check what gears it has in it.

 

It's not a chevy truck. They had 6 lug wheels, normal U joint yoke, etc.

 

Almost looks like a cast vs stamped steel cover.

 

wonder if it's out of a packard?

https://packardparts.com/1948-54-rear-axle-differential/

 

Ok - I'll try again - 1937ish Oldsmobile - yes, I edited this post - this is actually my third try - the Buick of the same era looked like this but it seems those all used a torque tube. 4.37:1 gear ratio

 

^^^i think you are correct.

Random picture from the interweb.

 

Yes. But what is it ?