I am installing a new transmission and converter in my truck this weekend and want to know what transmission fluid you recommend. I do some towing with this truck- a 24 foot boat and a race car and trailer- neither weigh over 7000 pounds total weight. I already have a factory aux transmission cooler but am installing another aftermarket and transmission temp guage to keep from frying another transmission- by the way it is a 4L60-E. Thanks for the input. Oh almost forgot- I am looking for something easily available- something I can pick up at a parts store, Walmart, etc... nothing I have to order and wait on.