...shifting into 2nd. and rev.? I bought the truck new, it is a farm truck with 96k miles on it. I pull stock trailers with it and sometimes it may sit at one of my pastures for a month or so before I use it again. I was told that changing the fluid may free the sc. that may be sticking at times. He also said to run diesel in it for a very short time to help cut the glaze off the sc. and then refill with fluid. I am not a mech. and do not want to harm the trans. The truck is a 4x4 with 4:10 lim.slip front and rear. It is in very good cond. for its age. Any help would be app. Thanks BH