Transmission cooler question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dubie · 08-04-2013, 10:04 AM

I have a parts master tranny cooler to hook up to my TH 350 today to finish up the cooling system. Does it matter which lines goes to which side of the cooler? And if so, could anyone help a brother out on figuring out which one goes where? Everything is installed, I just need to connect the hard lines from the tranny to the hose ends of the cooler
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**mr48chev** · 08-04-2013, 10:27 AM

I don't think it actually matters as the fluid is under pressure. I think but am not positive that I ran mine in at the top and out at the bottom.

fabguy · 08-04-2013, 04:14 PM

I believe the pressure side is on the bottom ( lower of the 2 fittings on the trans) and the return is the upper.

dwcsr · 08-04-2013, 06:00 PM

As long as your on the return side of the radiator outlet it doesn't matter. It should go from trans to radiator to cooler back to trans. The reasoning is that the radiator should bring it down to 180 - 200 and the cooler brings it lower.

1project2many · 08-05-2013, 12:41 AM

One other consideration is to plumb so fluid enters bottom of cooler and exits through top if possible. Helps purge air and reduce air pockets.

08-04-2013, 10:04 AM	#1
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,853	Transmission cooler question I have a parts master tranny cooler to hook up to my TH 350 today to finish up the cooling system. Does it matter which lines goes to which side of the cooler? And if so, could anyone help a brother out on figuring out which one goes where? Everything is installed, I just need to connect the hard lines from the tranny to the hose ends of the cooler Posted via Mobile Device Posted via Mobile Device __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

08-04-2013, 10:27 AM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,711	Re: Transmission cooler question I don't think it actually matters as the fluid is under pressure. I think but am not positive that I ran mine in at the top and out at the bottom. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

08-04-2013, 04:14 PM	#3
fabguy Elev8r Man Join Date: Aug 2010 Location: Glendora, CA Posts: 835	Re: Transmission cooler question I believe the pressure side is on the bottom ( lower of the 2 fittings on the trans) and the return is the upper. __________________ 1955.2 C4 Carry-all / Suburban ---> 55.2 Build Thread!! 1958 Fleetside SWB ---> 58 Fleetside Build thread 1939 2 door sedan *My F.B. project page.*

08-04-2013, 06:00 PM	#4
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: Transmission cooler question As long as your on the return side of the radiator outlet it doesn't matter. It should go from trans to radiator to cooler back to trans. The reasoning is that the radiator should bring it down to 180 - 200 and the cooler brings it lower.

08-05-2013, 12:41 AM	#5
1project2many Registered User Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,200	Re: Transmission cooler question One other consideration is to plumb so fluid enters bottom of cooler and exits through top if possible. Helps purge air and reduce air pockets.

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