Second time towing this toy hauler with a tune. First time towing 17k trans went into limp mode. Had Mike L do the trans works great. Now we re on our way to Arkansas towing 18k and goin up the hills in Az at 2000rpm at 55-60 seems like i can smell antifreeze. Not pushing the truck hard at all cuz i dont know it that well. She has 43k miles and i got alot more pedal but dont want to warp the heads with the tune. Im running it on #1 with korys tune. Just a little worried had my 05 lly snap head bolts while towing in glamis with a tune. Cost me 5k at ppe diesel to get it all redone. Btw i popped the hood in Az and no signs of coolant leak and reservoir is full. Exhaust is cut off right by the trans. Maybe im just a little too any info??