Transmission Cooling Line Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

78SilveradoSWB · 08-28-2003, 07:53 PM

On my TH 400 Tranny there 2 lines coming out and were connected originally to the radiator. On the radiator are 2 ports for the tranny line. One is the upper and the other the lower. Which one is the incoming and which one is the return?

Second question is a transmission cooling routing question. Does the tranny fluid travel to the tranny cooler mounted up front first, then through the radiator tranny cooler and back to the tranny or to the radiator tranny cooler through the tranny cooler mounted up front and then returned to the tranny?

08-28-2003, 07:53 PM	#1
78SilveradoSWB Senior Member Join Date: Apr 2002 Location: Beaverton, OR Posts: 1,615	Transmission Cooling Line Question On my TH 400 Tranny there 2 lines coming out and were connected originally to the radiator. On the radiator are 2 ports for the tranny line. One is the upper and the other the lower. Which one is the incoming and which one is the return? Second question is a transmission cooling routing question. Does the tranny fluid travel to the tranny cooler mounted up front first, then through the radiator tranny cooler and back to the tranny or to the radiator tranny cooler through the tranny cooler mounted up front and then returned to the tranny? __________________ Mitch 1978 Chevrolet Silverado C 10 454 BB, TH400

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