Hi Truckasaurus!
Yes, there is the 3600 rear end in it now. It has the standard very low gears. No one makes a ring and pinion for this differential, 3100, yes, 3600 no. So the only way to get a better ratio is to go to another differential. I know I can change 3rd member but the best you can do with that is 4:11. Some say there is a 3:90 pumpkin that will fit but I have never found one. And if I were to find one it would be an Eaton rear that no one keeps parts for anymore.
That is why I am searching for a more modern differential, one that I can get better gears for. Any suggestions?
Rick
