I have to wonder how the carbureted models controlled it. In EFI the computer simply grounds the circuit after receiving information from the vehicle speed sensor. A brake-pedal switch turns it off. I am working on a custom creation, and have no intentions of fabing entire circuitry to use a VSS and whatnot. If I must, I'll use a manual switch on the dash to control the TCC. But do I really even need the TCC??? We all know it helps fuel mileage and stuff like that, but is it harmful to leave the TCC solenoid disconnected??? Everyone seems to say something different. Speculation of possible consequences seems to range from nothing at all, to full-blown transmission meltdown!!! Can someone please clear this issue up??????? Can I just forget about the TCC?????

i ran a th350c in a 2wd v-8 toy street truck with the lock-up controlled with a dash mounted switch. eventually it quit locking up(not sure why),i ran it like a regular th350 after that and didn't notice much of a difference. i was usually smokin' the tires anyways so fuel mileage didn't matter to me.

Vacuum... if anything.

But I believe that the TCC is not needed. Kind of like an appendix... Nice to have it, but you wont miss it when its gone;)

They haven't been around for ever. And transmitions worked with out them then.:)

its not necessary to use, but it will keep the tranny fluid cooler, which is obviously better for it, as long as you have a sufficient cooler for the transmission you shouldnt have any problems. but im no expert so just my .02

MONSTERGM, if you want to run in closed loop you need a vss and a park/neutral.

After that all you need is a brake switch(open when brakes not applied) and the wiring for the TCC is done.

If your vehicle came with a lockup converter then all that junk is already there ready to use. You might as well just do it.

Charlo

Originally posted by charlo
MONSTERGM, if you want to run in closed loop you need a vss and a park/neutral.

After that all you need is a brake switch(open when brakes not applied) and the wiring for the TCC is done.

If your vehicle came with a lockup converter then all that junk is already there ready to use. You might as well just do it.

Charlo

Are you telling me that the computer wont switch over to closed-loop EFI without a VSS??? The '96 Jimmy had all that junk, but it was OBDII. I'm transplanting a TBI 350 and 700R-4 into the truck, and basically nothing is compatible so all the original stuff was gutted. I know I will probbaly get a code by not using a VSS, but if I never run in closed-loop, that's a problem and I'll be forced to implement a VSS.