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Tranny cooler location

Twisted Steel Performance

Twisted Steel Performance

Anything worth doing is worth overdoing.
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Pauline, SC
I am getting ready to swap back to a auto tranny, I don't have the stock cooler or lines so I need to figure out a cooler.

I really don't want to add another cooler in the cooling stack, so what about under the truck ? Pros and Cons welcome....

I am leaning towards the Derale kit below and mount it under the truck.

 
Auto trans - the cooler the better. Biggest and best you can get.
Yes under the bed is a common location so long as you can get to it to clean it every so often. Some trucks do better with the fan blowing up, some better blowing down. An old phone or go-pro recording which way strings flow naturally when driving is the best answer.
Hopefully someone here with a gmt400 can do the test for you, themselves, and everyone else and post videos show it (since your truck can’t be driven currently).

Talking with Mark (owns Mod Mafia) they prefer
That company makes them for all the F1 cars, many of the big boys in off road racing, etc.
He said basically they looked around at all they could and these guys are the stand out best.
 
Con would be that if a fan failed and the cooler didn't have natural air flow, you may not know about it for a while. Are you planning to run a temperature gauge?

Pro is that if in traffic when you're on the way to a campsite, your fan still blows across the fins where one in front of the stack just sits there.
 
With your fabrication skills, you might be able to make a protective shield that functions as an air scoop to force air when going down the road.
A bit of expanded metal as the screen for rock/debris protection and probably not be too expensive to build- obviously heavy in labor time for first build. But a potential sell item?

That’s my plan for my hummer, just not building/selling them.
 
Frame is a natural heatsink. However you go about axillary cooling always run the hot trans fluid through the radiator cooler first.
 
Oh. hmm. You'd be hard pressed to get a quicker cool down than a cooler in the tank of a radiator as a part of the 'cooler package'..

It's been explained to me like this; when you want to cool a torched off or welded part fast, do you leave it out in the air, or do you dunk it a bucket of water?
 
The military and most racing rigs went completely away from atf cooled in radiator because you are transferring atf heat into the coolant which hampers engine cooling ability.
 
Twisted Steel Performance said:
Yes I'll have a gauge, I'm thinking in the return line.
Click to expand...
Mine is in the pan. The fitting for the probe doubles as a drain hole for changing the oil.

I believe the 4L80E already has a spot for a gauge in the case, but when I did mine 20 years ago, I read that it's not the best position for the warmest temperature reading so I didn't go any further with it.
 
DieselCash said:
I plan on doing this, under the cab/bed area under the truck. I will use the dual one so I can move the engine oil along side it.
Click to expand...

I've been thinking about moving the motor oil as well. I'm going to call derale next week and discuss cooler sizes with them, I think getting everything out from in front of the radiator would be good.
 
Absolutely everyone with pickups should. You have all the real estate under the bed.
Getting all that heat away from the a/c condenser and the radiator is a good thing.

The area infront of the rear wheel between the body and frame like where fuel tanks were in square bodies- driver side is good spot for aftermarket lift pumps, power steering cooler. Passenger side might work for the atf cooler since lines are right there.

On hmmwv they started putting venting in the bed area for getting things out of the cooling stack. The green one is driver side, tan passenger.
Pickups could do something similar with dead space infront or behind the tire. Just do some kind of louvers that looks cool. Just no 1980’s Ferrari Testarossa imitations! Haha
IMG_8687.jpegIMG_8688.png
 
I have made up my mind on what coolers I will use. Both tranny & engine oil will get the same style with different fitting sizes.

tranny - https://derale.com/product-footer/f...rs/hyper-cool/hyper-cool-extreme/13870-detail
temp switch - https://derale.com/product-footer/f...controller-with-thread-in-probe-15-amp-detail

engine oil - https://derale.com/product-footer/f...rs/hyper-cool/hyper-cool-extreme/15875-detail
temp switch - https://derale.com/product-footer/f...l-standard-rotation-flex-fan-black-hub-detail

I'll make my own 10an engine oil lines and use the below block fittings.

www.ebay.com

AN -10 (10AN) Banjo Adapter To 1/2 NPT Stainless Steel Banjo Bolt Assembly BLACK | eBay

This clever assembly incorporates a stainless steel 1/2" NPT banjo bolt into a AN-10 banjo adapter. The banjo bolt can swivel in the assembly for easy orientation of the banjo. This is the very first NPT banjo and the only type of its kind available on the market.
www.ebay.com
 
I'll find someone that can help me with the wiring part, I'm guessing it would be best to use relays and I'm not proficient at wiring...
 
Will L. said:
Absolutely everyone with pickups should. You have all the real estate under the bed.
Getting all that heat away from the a/c condenser and the radiator is a good thing.

The area infront of the rear wheel between the body and frame like where fuel tanks were in square bodies- driver side is good spot for aftermarket lift pumps, power steering cooler. Passenger side might work for the atf cooler since lines are right there.

On hmmwv they started putting venting in the bed area for getting things out of the cooling stack. The green one is driver side, tan passenger.
Pickups could do something similar with dead space infront or behind the tire. Just do some kind of louvers that looks cool. Just no 1980’s Ferrari Testarossa imitations! Haha
View attachment 83339View attachment 83340
Click to expand...
I'd be scared of tearing something up.

Anything I put under the vehicle would have to be protected.
 
Twisted Steel Performance said:
I have made up my mind on what coolers I will use. Both tranny & engine oil will get the same style with different fitting sizes.

tranny - https://derale.com/product-footer/f...rs/hyper-cool/hyper-cool-extreme/13870-detail
temp switch - https://derale.com/product-footer/f...controller-with-thread-in-probe-15-amp-detail

engine oil - https://derale.com/product-footer/f...rs/hyper-cool/hyper-cool-extreme/15875-detail
temp switch - https://derale.com/product-footer/f...l-standard-rotation-flex-fan-black-hub-detail

I'll make my own 10an engine oil lines and use the below block fittings.

www.ebay.com

AN -10 (10AN) Banjo Adapter To 1/2 NPT Stainless Steel Banjo Bolt Assembly BLACK | eBay

This clever assembly incorporates a stainless steel 1/2" NPT banjo bolt into a AN-10 banjo adapter. The banjo bolt can swivel in the assembly for easy orientation of the banjo. This is the very first NPT banjo and the only type of its kind available on the market.
www.ebay.com
Click to expand...
Did you ever order those fancy banjo bolts from the UK?
 
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