Stall & Shift Kit
The trans cooler is a must, but I always like to think of a stall as better on the tranny anyway, Its usually half the weight as the stock stall and provides alot more cushion during shifts whitch saves hard parts in the tranny. The only downfall I've found with a stall is heat, but with the right coller this really isn't a problem.
My stock stall caused more damage( broken output shaft) vs my stall, whitch provides more cushined shifts, and it makes the tires spin less vs. the stock stall which costed me time.
Good luck and you will love that 3500!!



