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Re: TH 700R4 TCC lockup wiring
My 85 has a 3 wire hookup, one of the wires went to the egr solinoid for some reason, and my transmission works as it should without that hooked to anything. I'm not sure the wiring on a 85 and 86 is the same though. Is the harness for the 700r4 still in your truck? I'm not sure if it's the same for 86, but the 85 set up is pretty basic with a low vacuum switch, and a brake switch to control the lock up.
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