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Trans cooler

Chris

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MikeNH Senior Enthusiast

MikeNH

Posted
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Just look through the damn grill, no need to take anything apart. I don't mean to be short but you're about to throw money away if you already have one in place, I wouldn't even begin to worry about 200 degree trans temp, everything I've seen says 250 is the number when you should start worrying.

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Chris Senior Enthusiast

Chris

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when its winter and its hitting that i worry. i live in the desert. and i know i had the grille off previously to install my billet. i had to cut out the stock grille

nickvrebel Senior Enthusiast

nickvrebel

Posted
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keep in mind that your transmission fluid does in fact pass through the trucks radiator (lines are on the passenger side at the top). This will HEAT your transmission fluid to approximately the coolant temperature of the trucks engine, the auxillary cooler will mount in line with this system after the radiator to further cool transmission fluid. 200* is nothing to worry about, I would regularly run 185-200 in my '03 4.8 Silverado.

Chris Senior Enthusiast

Chris

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Got my cooler. Which line do I tap into on the radiator? Upper or lower? I'm not sure which is the return line.and just a side note what's the slim cooler on the trucks left side . Its tall and narrow and about an inch thick.

I just want to make sure I do this right

dewfpo Senior Enthusiast

dewfpo

Posted
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The lower line coming out of the radiator is the output line. IN at the top, OUT at the bottom. The other cooler you mention may be a power steering fluid cooler. Follow the lines.

 

DEWFPO

Chris Senior Enthusiast

Chris

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ok so ill be completing this tomorrow. thanks for the info

wavery Enthusiast

wavery

Posted
Posted

I know i dont i pulled the grille off my truck...

 

I do like that little fan what size is that ill be getting the 11x7-1/2 super cooler

 

 

I used this trans cooler:

http://www.amazon.co...6522111&sr=8-10

 

You will need one of these fittings fot the radiator:

http://www.amazon.com/Hayden-Automotive-397-Transmission-Fitting/dp/B000EPRCAC/ref=pd_sim_auto_2

 

This is the 9" version of the pusher fan that I installed (the one that I got was 11"). I just attached it to the cooler with plastic wire ties (doubled up).

http://www.amazon.co...26517237&sr=8-1

 

This is the relay that I used:

http://www.amazon.co...26517403&sr=8-8

 

I attached the hot side to the battery (with the included 30A inline fuse). I spliced the activator wire to the trucks radiator cooling fan. Then the other side goes to the pusher fan. That way, the pusher fan only runs when the radiator fan runs and the power comes from the battery so that your radiator fan circuit is not over-loaded.

 

Pull the upper trans cooler line off the the radiator. Clamp one end of the rubber hose directly to the trans cooler line. It has a barb on it. Install the proper fitting on the ratiator and clamp the other hose on that fitting.

 

Be sure to mount the cooler with the hoses coming out the side (like in my pic). Never install a trans cooler with the pipes coming out the bottom. Top is OK but you may not have enough room.

jblakeney Senior Enthusiast

jblakeney

Posted
Posted

Just my opinion, a transmission without an external cooler, is just a problem child........ When I build one I always put a cooler on the vehicle if it didn't have one.

 

Ya, you have one in your radiator, but its more to warm the fluid when the fluid is cold than remove heat. Think about it. Your engine is 195-210 the coolant in the radiator tank is that tooooooo.

 

I tow frequently with my 4L80e in my 3/4 ton, with nothing behind it the temps are around 160 and 180 with a trailer. After I made a little upgrade to my cooler. Before 170 and 220.......

 

Jbo

EX-F150 owner Enthusiast

EX-F150 owner

Posted
Posted

175 C or F?

 

175C = 375F, if it were to get that hot it would burn it's self up in about 200 miles lol
latreille89 Enthusiast

latreille89

Posted
Posted

175 C or F?

 

175C = 375F, if it were to get that hot it would burn it's self up in about 200 miles lol

 

 

Ya I guess that was dumb to ask.

CapitalTruck Senior Enthusiast

CapitalTruck

Posted
Posted

The lower line coming out of the radiator is the output line. IN at the top, OUT at the bottom. The other cooler you mention may be a power steering fluid cooler. Follow the lines.

 

DEWFPO

 

 

Wrong. It's the other way around. The transmission fluid enters the radiator at the bottom inlet and exits through the top. This is to keep aeration from occuring (from fluid entering the top and dropping down in the cooler).

Chris Senior Enthusiast

Chris

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are you certain? because if this is true i have to reroute lines now and can i now have the part number for the line that comes out of the lower radiator port to the transmission. i cut the rubber line and routed in series to it

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