I have an 85 chevy truck that I don't know much about. When I push on gas pedal it seems to take a lot just to get it to move. It is a 4x4 and I think it has a 700R auto. It has 38.5 in tires on it and I can't here the trans slipping. Is this normal for a truck with big tires? Would a trans with a big stall do this. Has a 350 engine that seems very snappy until you put it in gear.

Thanks Tom