Any truck purchased is a risk. That is why they have warranties. We all take the same risk everytime we plunk down our bucks on a sale. I owned a Ford Explorer that crapped out every other month while on warranty. The damned transmission was CLUNKING in all-wheel drive when the warranty ran out. I got rid of it and bought a Solara. Don't know why I ever drifted away from Toyota since I owned them since '86. Ain't sayin' Fords are bad....but you can't get me to BUY another one!
Did you buy your 2000 Tundra new? If you didn't, did you run a Carfax on the VIN? Maybe this thing was wrecked?