I recently purchased a 2007 TBSS AWD with 53K miles on the clock. Truck runs great but i'm noticing this more now this getting colder when i start it up and go into gear the shift from 1-2nd is a little harsh. it keeps doing this un til its fully warmed up. When start the car i always give it a few minutes to warm up before i start driving it. I happed to find the previous owner and he said that the only issue he had with it was the valve body in the transmission had to be replaced. He also said never did anything to the drivetrain fluid either. I check it while it was running and the fluid levels looked good. I want to make sure there is nothing wrong. I plan on swaping all the fluids soon(Diff & Tranny).