Lock-Up TC Wiring - Off-Road Forums & Discussion Groups
GM Standard SFA Trucks & SUV's All discussion of full sized Solid Front Axle Trucks, SUV's to include Suburban

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post #1 of (permalink) Old 10-09-2002, 09:28 PM
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Lock-Up TC Wiring

82 350 Trans with lock-up TC. What tells the TC to lock-up? Is it controlled by the pressure switch on the side or by a computer.

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post #2 of (permalink) Old 10-09-2002, 10:08 PM
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Re: Lock-Up TC Wiring

I think it is a vaccum switch, not positive though and there would have to be more to it than that anyway. I do know that it isn't computer controlled. The TH350 was used before computers were even put in the trucks.
post #3 of (permalink) Old 10-10-2002, 08:33 AM
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Re: Lock-Up TC Wiring

on a 700 there is a vacuum switch that if the brakes are off and vacuum is right it send power to the TCC. If you hit the brakes it cut all power to the switch so it can't lock while hitting brakes. You might checkout bowtieoverdrives.com, I think they have some info on that regarding the 700, I don't know if it is the same for a lockup TH350
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