700R4 build thread. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

clinebarger · 12-10-2015, 08:57 PM

Yes it is the a Temp Switch, It closes at 280 degrees IIRC, It is a fail safe if the trans gets hot, The unit will lock-up in 4th gear no matter if the ECM commands TCC or not.

Eliminate the temp switch & wire it exactly like your second picture shows!!

Tech Tip....Take the Lead with the Black wires off the Temp Switch & Connect it to the 4th gear pressure switch. Cut out the other (Green/Tan) Temp Switch Lead.

Before you put the pan back on.....Test the TCC solenoid & 4th Pressure switch if you haven't already.

12-10-2015, 08:57 PM	#9
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 700R4 build thread. Yes it is the a Temp Switch, It closes at 280 degrees IIRC, It is a fail safe if the trans gets hot, The unit will lock-up in 4th gear no matter if the ECM commands TCC or not. Eliminate the temp switch & wire it exactly like your second picture shows!! Tech Tip....Take the Lead with the Black wires off the Temp Switch & Connect it to the 4th gear pressure switch. Cut out the other (Green/Tan) Temp Switch Lead. Before you put the pan back on.....Test the TCC solenoid & 4th Pressure switch if you haven't already.



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