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Old 06-14-2002, 11:10 AM
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Post TH350 lock up wiring

I have a 1980 Chevy 1/2 ton PU. The motor is a 350, the tranny is a 350TH with a lock up converter. The truck came equipped with the lock up converter originally, so the vacuum swittch is in place. I just bought the truck about a year ago. The tranny just took a crap. I purchased a junkyard 350 tranny w/ the lock up converter out of an 86'Chevy truck. My question is, "Does anybody have a wiring schematic on the 80' model to show me where the wires go and what colors they are?" I know that the hot out of the tranny hooks to the brake light switch, but which of the three wires on the vac. switch do I hook the other wire(ground) to. <img src="confused.gif" border="0">

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