Recently on cold mornings the transmission "slips" when shifting into 2nd, actually it jumps or jerks,, sometimes with enough force that I think its going to fall out of the truck. If I go slow, thinking it might happen, its a gentle jerk, if I'm going fast, watch out. The local dealer knows nothing, sees nothing and finds nothing., fluid level is ok, according to them. My theory, with respect to the cold, is the fluid is thick, and possibly condensed more, maybe a fraction lower. I wonder if I put it in neutral, let trans warm up, maybe it wouldn't happen, but this problem first started back in the summer (there goes that theory). Anyone have the same problem or have ideas?