i use it, what i found is that when you put it in the first time the amount of detergent in the thing just flushes the crap out of the tranny, i did a full flush w/ the $7 a quart expense. 1 week later it went from cherry red to cocacola coloring. so i flushed it again. that was expensive.
coupled with even a small tranny cooler the difference isnt noticable in the driving but in the clenliness of the fluid afterwards. after the flush and a 7 quarts of rp my tranny fluid has stayed candle apple red for about 2k miles and the tranny is noticably cooler now. it wont add much hp but it will make it smoother and MUCH cleaner. atleast from my experiences on a 70k mile old tranny.
