The 2 speed diff on my 46 2 ton has the vacuum shift and works great, just shift it and lift on the gas to make a little slack in the drive train. The only time I use it is to down shifting going around a corner. It doesn't grind at all like the tranny does down shifting into 3rd. A big project you have there, looks a lot like mine did 15 years ago. The thing that probably saved both trucks from the crusher is the glass stayed in them during the rusting process!
Last edited by Chris's 46 / 515; 12/13/2020 4:34 PM.
