Originally posted by MeanBuicks
Making a manual TCC switch is cake. Insert a wire into the upper leftmost & upper right most terminals in the ALDL port under the dash. Then, put a switch between the wires. Chips can also be burned to lock up the TCC at WOT.
It's probably best to lock the converter just after the third gear shift. Locking it earlier punishes the converter & transmission more and may actually hurt performance due to lack of torque multiplication on the shifts.
How long the converter will last is a hard question to answer. It depends on how often it's done, how powerful your car is and what converter you're running. A stock D5 converter will hold out decently on a typical street/strip 12-sec TR.