The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 700R4 lock-up in 68

cparman · 12-21-2007, 02:33 PM

I did this in a 67 chevelle. Here goes. the 4 wire connector in the trans is lettered a,b,c,d. The purple wire in the connector you get at the local boneyard is " A"
I ran "A" to a toggle switch, and THEN thru a 4 pin brake light switch out of a 78 corvette with cruise. the tcc lock up was wired thru the cruise " on off " part of the brake light switch.

SO if you were cruising slowly and did not want the TCC to lock up, TURN THE TOGGLE SWITCH OFF. If you are cruising on 45-55 + TURN THE SWITCH ON.

this way you have the best of everything. TCC lock up when you want it.
I intend to do this to my NEW 69 chevy short bed soon.

12-21-2007, 02:33 PM	#8
cparman sharp as a marble Join Date: Jan 2007 Location: atlantic beach,florida Posts: 1,082	Re: 700R4 lock-up in 68 I did this in a 67 chevelle. Here goes. the 4 wire connector in the trans is lettered a,b,c,d. The purple wire in the connector you get at the local boneyard is " A" I ran "A" to a toggle switch, and THEN thru a 4 pin brake light switch out of a 78 corvette with cruise. the tcc lock up was wired thru the cruise " on off " part of the brake light switch. SO if you were cruising slowly and did not want the TCC to lock up, TURN THE TOGGLE SWITCH OFF. If you are cruising on 45-55 + TURN THE SWITCH ON. this way you have the best of everything. TCC lock up when you want it. I intend to do this to my NEW 69 chevy short bed soon.