I don't know what this tranny is.

I am trying to figure out what this transmission is. These are all the numbers i have for it.

78408172
PP833578
c15406
76-77
A991262
c13303G
4-17-77

The main case is Aluminum and the tail shaft is cast iron.
Bearing diameter= 3.544
Bearing Retainer=4.795 Part number=G13157

The arms on the transmission for 1/2 are upward and the arms on 3/4 are also upward.

The transmission functioned fined while in the car and 4th gear seamed like the highest gear. I was told the guts of the transmssion are from a cast iron A-833 and the housing of an overdrive unit. With the overdrive gear.

Thanks for any help.