[cloud1e]

When engine/transmission are cold, in drive and stopped sometimes the truck decides to engage first and try to move forward when I'm not pressing on the gas. No the pedal is not sticking. If I stand on the brakes to make sure it doesn't move it stalls out. If I'm light on the brakes rpms drop and I move a foot or two then it stops and goes back to normal. Sometimes it happens back to back, other times not. Any ideas? 235000 miles

 

[Zaan]

This is indeed strange. What your describing sounds like the torque converter lock is engaging which it's not supposed to do in 1st gear at all.