yep, thats what was happening. On and off with the lock up. I ended up just putting it in 3rd on the freeway for a while but then the temp guage crept up. It feels fine now but ive heard that they will just let go whenever. Is there any point in fitting the tranny cooler if im not doing anymore towing with it? I dont trust any workshops to put in the maxlife. Tranny blokes over here are super sketchy. Like the pun? hahaha