Overdrive for the ‘55: new driveshaft yoke.
In order to use the NP 833 4 speed OD trans in my ‘55, I had to switch driveshaft yokes (its the same length as the old 3 spd.). My trans np833 used a 350 turbo sized yoke, but others used the bigger 400 turbo one. I went to the junkyard and got a yoke (and driveshaft) for $15.
I got one with outside clips on the u-joints, like the ones in my ‘55. The same u-joint fit both my old drive shaft and new yoke. I have an interesting (and I think, superior) method for changing u-joints. First I use pliers or a screw driver to remove the clips. Everything else is done with a bronze (or deadblow) hammer and a couple pieces of scrap wood.
