I am new to forums and this is an older thread so I don't know if there will be any replies but I have a couple of questions about the transmission bearings. I have two transmission that came out of 4wd diesel pickups. The one came out of the 1984 Ram 50 that I have been using for a several years but it was getting a whine to it. I pulled it apart to replace bearings. The other transmission is a bit heavier duty but has the front input gear totally destroyed. It has a constant mesh reverse gear with a much bigger idler gear. It also has tapered roller bearing on it on both ends of the case with the normal ball bearing on the end of the counter shaft. The transmission that came out of my truck had a tapered roller bearing on the front and a double ball bearing on the back of the case. That is the bearing that is bad. What I am wondering if I could replace that bearing with a tapered roller bearing and machine spacers to for adjustment of the bearings and to center the counter shaft in the case. I was also wondering if I could put the better reverse setup on my transmission that now has the square cut gear with the smaller Idler? Any suggestions would be appreciated. Thanks Rick.