Need some advice on installing the drive shaft on a 53 Chevy pick-up. First a little background: I 'trashed' the U joint and cracked the tranny case and had to replace all. We have installed the 'new' tranny and now need to detach and clean out/up the drive shaft and the differential. In terms of order, does it matter if the differential is fixed first and then to re-install the drive shaft or first the shaft? Thanks for your advice.