Ok, rebuilt the TH400 for the 68. Reason of was the housing in the 68 was broken and I had another casing for it. I went through everything on the trans and modified the valvebody and plate, Switched all the cluthes with Kevlar and new plates, Put all new seals in and assembled the trans. After assembling the trans I realized I needed to switch the drive gear on the output shaft for the New gear ratio. Ok, I never had to switch a drive gear on a 400 before but this 400 tailshaft is a 67 tailshaft and the drive gear is pressed on. Please dont tell me I have to take the trans all apart again to press off the old gear and new one on!!! Is there another way???? I have the new gear and it is a press on as well. What do I have to do?