More Info Please

[68Dartmouth]

I have what I belive to be an A 833-OD transmission, the IBR is 5.125". There are 2 numbers in the side:
PP8365008 and 5B257622 can someone please tell me what I really have?

 

[cudamark]

Looks like a 1975 cast iron A833 4 speed to me. You'll have to spin the input shaft in high gear to see if it's an overdrive or not. Non-overdrives are 1:1 in 4th. Overdrive ones vary a little depending on which gear set it has but usually somewhere in the .7?'s. Just mark the input and output shafts and see if they turn at the same rate in high gear.
The O.D trans will be 1:1 in 3rd so make sure which gear you're in!