You can build your own for free if you have some wires and a switch.. Just "T" into the ALDL A and F wires , they are connected to the top, outermost terminals of the ALDL connector. Connect both of the wires you T'ed into to the switch so that when you throw the switch, it connects the two. If you are driving 20-30mph and you throw the switch, you should feel it. You can use a paper clip to do the same thing but it will mostly just fall out and piss you off if you try to use it more than a handful of times. Believe me, I tried using one at the track once :smile:
You would only want to use the switch for a drag race.. definitely not engaged all the time!! When you are ready to use it, you can just flip it and then do a boost launch and nail it, it will automatically engage after the 1-2 shift. If you wanted to delay the lockup for some reason, you could flip the switch while going down the track, I think?? I haven't tried that and I don't know about any negative effects.
I have a Sy so I had the two "knockout panels" on the upper left dash, I used one of those for my TCC lock switch. "Looks factory!" The only downside is I don't have any type of indicator to say when the switch is on in case I forget to turn it off.
I have not noted any significant or notable gain using the TCC lock on my stock motor, turbo, and torque converter BUT from what I have gathered, if you run 17 PSI or more, you can begin to realize effects to the tune of 2 or 3 tenth improvement! Also if you have an improved torque converter like the 9/11" lockup, you could also notice the 2-3 tenth benefit. Hopefully some of those who have those mods can chime in with their experiences.