Redundant Transmission Cooler? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

78SilveradoSWB · 08-03-2003, 06:23 PM

I am tearing into replacing my water pump, which have led me to do additional stuff. I noticed there are 2 lines coming from the TH 400 transmission one going into the upper fitting on the radiator. The other line goes into a small, I guess transmission cooler mounted beneath the radiator core support which has a line connection to the lower radiator fitting location. Is this redundant? My current radiator is a HD 4 core which I thought has a radiator cooler built in. I know my new aluminium radiator that I just bought does. Can I eliminate this small one and plumb it back with both line from the transmission going into the radiator? Should I replace the transmission line from ridged to flex lines?

**swervin ervin** · 08-03-2003, 08:13 PM

That sounds like an auxiliary tranny cooler. I say leave it alone. It's made help the radiator cooler keep the tranny fluid cool.

I added one to my truck with a 700R4.

**old Rusty C10** · 08-03-2003, 08:57 PM

IF you do any kind of abusive driving with your truck ( trailering, pulling stumps, city, stop and starts, off road, etc ) you want this extra cooler it helps prolong the life of the tranny

gchemist · 08-03-2003, 09:16 PM

Quote:

IF you do any kind of abusive driving with your truck

Like driving like you stole it, driving looking for a road kill......
Keep it. I added an extra cooler for mine too. The tranny will live a lot longer under ordinary driving conditions.

08-03-2003, 06:23 PM	#1
78SilveradoSWB Senior Member Join Date: Apr 2002 Location: Beaverton, OR Posts: 1,615	Redundant Transmission Cooler? I am tearing into replacing my water pump, which have led me to do additional stuff. I noticed there are 2 lines coming from the TH 400 transmission one going into the upper fitting on the radiator. The other line goes into a small, I guess transmission cooler mounted beneath the radiator core support which has a line connection to the lower radiator fitting location. Is this redundant? My current radiator is a HD 4 core which I thought has a radiator cooler built in. I know my new aluminium radiator that I just bought does. Can I eliminate this small one and plumb it back with both line from the transmission going into the radiator? Should I replace the transmission line from ridged to flex lines? __________________ Mitch 1978 Chevrolet Silverado C 10 454 BB, TH400

08-03-2003, 08:13 PM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	That sounds like an auxiliary tranny cooler. I say leave it alone. It's made help the radiator cooler keep the tranny fluid cool. I added one to my truck with a 700R4. __________________ Mike 1985 Chevy C-10

08-03-2003, 08:57 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	IF you do any kind of abusive driving with your truck ( trailering, pulling stumps, city, stop and starts, off road, etc ) you want this extra cooler it helps prolong the life of the tranny __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!



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