Hey Everyone I have a 1986 EX MOD 110 with a 12J and LT77. It have been sitting around for a while as I have built my house. I went to move the truck and it was stuck in gear. After taking it out of high gear and into neutral. I was able to move the into neutral/ main gears. truck will start, when the engine is operational and i throw the gear box from neutral into high or low. The truck will move, i will get a clunk, and it will stall out. Some other conditions facing me, the clutch pedal "feels" a lil light. You guys think it could be the rear diff. My LT77 gear box, linkage.

Any advice on were to start looking would be awesome, would like to drive this truck for once

thanks Ant !