When I rebuild my 700r4 I didn’t buy any special tools, I did have to make some though. Used a mig welder & 4” grinder & some 3/16 plate steel. I did buy 2 different sets of snap ring pliers. You’ll need a big bench vice. I didn’t have a shop press which would of helped a lot. I used a few different lengths of 3/4” bolts & several different kinds of 3/4” washers to press in bushings.