[gchemist]

Is labor included with the $1800 for install? If so, I think it's fair because intalling on a 4X4 is harder.

Stall is when the converter engages engine and transmission together. It's the same thing a lock-up does. In a stall, it's a mechanical engagment. It happens regardless of speed because it's based on engine RPM and load. My converter locks at ~45 RPM either in 3rd or OD. It locks at higher RPM if I put more throttle on it. Stall is good for perfomance motors. Stall is set to "lock" when an engine begins or is in its torque power curve. In most cams, power starts a ~1200-1500 RPMs and up. Racing cams curves are in a much higher RPM range.