I am having a dilemma onw hich type of torque convertor to get with a th400 I am rebuilding. I will be 4 wheelin and towing maybe 2000lbs. Quad and 3 dirt bikes. Cam sugested aI use a 1800 but I spoke to a frind and he said to get a lower one than that and then I also heard that maybe a high one. CONFUSED?