I had a severe vibration comming from the driveline on my 65 custom 500 and the less the 3000 mile front U joint is bad and since the tailshaft seal in the trans is leaking now is the time to fix it. I went to autozone for a seal and U joint and three different type of trans came up,a tremac with a few model numbers and a T85 and T86. I have the normal toploader non o/d 3 speed trans so what do I have. Jeff