according to my gps, my speedo is dead accurate from bottom to top
Having a mechanic replace a gear is totally out of the budget of this truck. That stuff is NOT cheap to do. Even replacing the final drive is not a cheap thing to do since i can't do it myself. I was also thinking about the final drive thing... if i did that, then this gutless p.o.s would spend more time in second gear because any moderate hill requires that i floor it to keep my speed up.
I think my best option is to just sell the damn brick and buy a big V6 manual truck and an aluminum trailer... I just don't like the idea of daily driving a V6 truck. (i would have to sell my car as well to afford a decent one)... although, if i could find a deisel manual then i could consider a veg conversion down the road.