Quote Originally Posted by AA1OH View Post
I had the same transmission in my 70 Challenger. Nothing odd in it other than the oil pump (front two gears in constant mesh have 3 holes drilled into the counter shaft gear) and the fact that for the cars you use only ATF. Even on my 440 sixpack. Truck might be different. And check your shift forks, I had one break off on me.
Truck calls for 80w90 and unlike your 70 Challenger has an Aluminum case and an Overdrive 4th. I will be pulling the case apart in the morning. Had to order a plug for the countershaft which is only needed on the OD.