I have aquired a chevy three speed with overdrive that is supossedly from a 55-58 car and am having trouble identifing what it is for sure, it is not maching up with any info i have found online, cast numbers on the case include:
11-23
a Large 5
RIOH-I
WG DIV
3845157 GM
a Lage H

Any info would be very helpful includeing how to hook up the o/d and what goes to the two possible solinoides on it
Thank you very much

Other Numbers Found
3845122
L134
these are located by the side cover which has 4 bolts

Over in the Driveline forum of Stovebolt another OD poster is getting some help. Check that forum.
http://www.stovebolt.com

I did some digging through their archaives but had alot of trouble finding anything that wasnt for a truck, it was worth a shot thanks anyways

Do you have pictures of it? The R10h-1 is for the R10 Borg Warner OD. There was also an R11.

It's probably an SM-319. Everything you need to know about it is here.