I was looking for something to bolt up to my flathead. Ran across this trans. Out of a late 70's f250 maybe???
cheap, durable, HEAVY, will outlast the engine. If it does not use up too much room it will work fine. Originally I thought of a truck transmission in a 'Hot rod' as being really dumb. "BUT' after attending a few parades and trying to snake thru crowds at a few car shows,(with my muncie 4 speed car) the 'granny' low gear works great!
I always thought they made a pretty good truck trans, but I don't think 'd want one in a car. The throws were pretty long if I remember, although they did have sort a charm in their own rite. I know(or think I know) that when people talk about a T5 for an old car they gravitate towards units pulled from 5.0 Mustangs, but wouldn't a 4 popper Mustang or S10 V6 T5 have gearing more appropriate for a flathead and still have enough torque capability for the old girl?
Around 48 Ford used a T98 behind the flathead in large trucks. T19, T18, T98 are from the same family of Borg Warner transmissions. With some ingenuity and machine work you could put a set of T19 guts into a T98 case and bolt it to the back of the flathead, gaining a synchro 4.0 to 1 first gear. Jim Ford
My plan is to use a new process 542 in my 28 chevy cpe with bbc power. Its syncro on the top 4 gears and the ratios compare favorably with a muncie haveing a 3.40 or so first gear. The first gear in the 542 is around 5.40 which makes it a great "parade gear". The top 4 gears are evenly spaced because the trans is designed for diesel cycle compatibility. Its strong enough that I will never be able to break it in a 2400 lb car.
I run a T19in my 53 F350, but that's a one ton dual rear wheel big truck. No way i'd want it in a car. Huge, heavy, clunky shifting. For a truck the ratios aren't terrible and that's why i swapped it in. Mine is the 4.0 low gear diesel one, used about 1983-87, the gas engine ones have a 5.-something first.