I currently own a 2002 Tacoma V6 TRD 4x4 with the auto. Ive got a trd (hayden) cooler with a permacool remote tranny filter since im running redline D4 would it be wise to add any additives along with the synthetic aft to help prolong the life of the tranny? What do you recommend? I drop the pan every year and i clean the screen every other year. Im not hard on my truck. Currently i have 47K. Thanks.