Muleman, FYI. The 4 speed is a non synchro trans. You must double clutch in order to execute the downshift. (pedal in-move lever to neutral-clutch out, rev up, clutch in, lever to lower gear, clutch out.) But you probably knew that. The 3 speed on the floor is synchro in 2nd and 3rd. So a downshift is just like in a modern vehicle, which is nice when you're gearing and engine are up to modern roads. I had an NOS 4 speed for quite a while in my '45, but then went back to an NOS 3 speed because of the synchro. My truck is capable of quite some speed, so to have the ability of a "no-brain" downshift is quite important to me.
You can install a 3 speed in your truck but you'll have a bit of swapping to do regarding the u-joint. You'll use half of the 1/2 ton joint and half of the 3/4 ton joint. The only thing I miss about the 4 speed is the granny gear, but it's ok without it.
Are you shifting up without the doubleclutch? Could be so old and abused that the PO "broke it in" real nice!
