Hey guys. I just bought a 86 K-10. It has a manual transmission in it, but its not the typical 4 speed. Its a 3 speed with overdive. This is only the second one of these trannys ive ever seen, and the only one in a 4 wheel drive. This tranny is a side rail shift tranny like a muncie. Does anyone know what the transmission is? Who makes it? A model? Gear ratios? What oil does it take? Any info is appreciated. Brandon