I looked in my 65 ford shop manual, it showed T89 warner and the NP435.
And one I have is the NP435. The 3spd trannies, I found out that they have least 3 diff types. Light duty, med duty , heavy duty with linkage shifting. Thanks Rob

Why I was going to put in 4spd. Cause I have all the parts to make a auto to a manual. Pedal, bellhousing, flywheel, and etc. I have a tranny 4spd from my f100 I was going robe from. So, I see they can be different tranny, lite and heavy duty trannies NP 435 , or a T 89 , or T18 . How can you find t...

Use like a 1973 or so and up on front Axle. Is it a 3/4ton or a 1/2ton?
Rob

I bought a 66 f250 with a 352 and a FMX HD Auto tranny. I like to put a NP 4spd [top shifter] in from a F100. Is it the same for the 1/2 ton to 3/4 tons? Thats the question. Or is it easyier to put in a C6? Do I have to change the driveline, linkage, tranny mounts? thanks Rob

I have a 66 F250 with a wore out FMX HD auto. I have a F100 4spd tranny to put in there. Is the 4spd floor shifter in the F100 the same for the F250 65-66 ford Trucks? I was thinking of putting in a C6, but I would have to change the drive line,linkage . Or will I don't have to? Rob Thanks