Is it Bad to drive the truck around with the overdrive off all the time. I just don't trust the over drive ever since I blow my motor.
the ONLY time overdrive can hurt anything is exactly as you stated...... WOT while going INTO overdrive(stock trucks 120mph right?).
You DO NOT need to drive around with the overdrive off. Only turn it off when your going to run it through the gears. As already stated, the issue is shifting into OD at WOT.