TH400 to 700R4 wiring with TBI - The 1947 - Present Chevrolet & GMC Truck Message Board Network

88CrewCab · 10-13-2010, 06:46 PM

I swapped the TH400 for a 700r4, can anyone tell me how to wire it to make it lockup. Do I wire it to the ECM or with a kit?

DetroitIron · 10-13-2010, 07:44 PM

My 700R4 is old school hydro lock up....no wires...sorry this may not help you...i have a 85 K20 and the trans works just fine with no wires.

10-13-2010, 06:46 PM	#1
88CrewCab Registered User Join Date: Aug 2010 Location: Marianna, Fl Posts: 1	TH400 to 700R4 wiring with TBI I swapped the TH400 for a 700r4, can anyone tell me how to wire it to make it lockup. Do I wire it to the ECM or with a kit?

10-13-2010, 07:44 PM	#2
DetroitIron Registered User Join Date: Jul 2010 Location: Hudsonville, MI Posts: 174	Re: TH400 to 700R4 wiring with TBI My 700R4 is old school hydro lock up....no wires...sorry this may not help you...i have a 85 K20 and the trans works just fine with no wires. __________________ _______________________________________________ 1985 Chevy Scottsdale K20 350 with 700R4 running 3.42 gearing aka "The Honey Badger" 1993 Silverado C3500 Ext. Cab Dually 6.5 turbo diesel



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