I ordered new differential yolksand transfer case yolks after replacing my seals and none of them will fit, I tried tapping one on and it wonít go on. I heard there is a tool that you could press them on with but I canít find anything available and if I try to pound them on Iíll do some damage as I already tried that on the front differential. Any advice would be very helpful. This goes on a 1950 M 38 Jeep with the Dana 25 front differential.