I pulled an 18 foot boat with a 260 horse outboard on it with the Transport that has a 147,000 on it and no problems. The Transport came with the towing package, that probably helps. I already did the flush on the GTP the filter goes in today I'll keep you posted on what happens with it. Did you guys actually flush yours and run into problems or did you just hear about problems with flushes? I would think that if the trans is weak to start with nothing will really help especially the snake oils out there or just fluid changes. Quick engagements when a trans shifts is a good thing, less heat. The slow engagements are what causes heat and transmissions hate heat. Another vechile that I have is a 1994 Chevy dealer optioned SS350 pickup. I got that with 97,000 on it, had the trans power flushed, and I tow a 21 foot cuddy cabin boat with a 350 in it. The truck now has 119,000 on it and the trans shifts like new. I took it to us66 this summer and it turned 15.90 all stock. No problems with that trans yet.