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Adding a transmission cooler

Adding a transmission cooler

gr8dain

Full Time Jeeper
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Location
Ashburn, VA
Vehicle(s)
'84 CJ-8
Soon I will be swapping my T-176 four speed for a TF999 auto. I plan on adding a Transmission cooler.


For those of you running an auto with a tranny cooler, what set up are you using? Cooler in front of the radiator (I have a champion aftermarket radiator)? Do you have the cooler running in series with the radiator or just directly lined to the tranny?

If not in series with the radiator, do you have a temp sensor and gauge? How do you add fluid to the system?

Thanks. Trying to get all of my homework done before starting.
 
Run it in front of radiator, with a temperature switch for control. Is what most the 'juice-box' drivers here in the Mojave do.
Run hard lines as much as possible for the same reason you do with fuel lines.
LG
 
A thought just occurred to me. If you didn't put the cooler in front of the radiator, where would you put it?
 
A thought just occurred to me. If you didn't put the cooler in front of the radiator, where would you put it?



A lot of people use rail style coolers along the frame. Others I have seen run one with a fan and put it against the bottom of the tub below the back seat.
 
Run it in front of radiator, with a temperature switch for control. Is what most the 'juice-box' drivers here in the Mojave do.

Run hard lines as much as possible for the same reason you do with fuel lines.

LG



I was looking at the Advance Adapters steel braided hoses instead of the hard lines. See any issues with that?
 
A lot of people use rail style coolers along the frame. Others I have seen run one with a fan and put it against the bottom of the tub below the back seat.
I would put it in front of the radiator. Along the frame would be ok for a truck or car but with a Jeep I would be afraid of catching it on a rock or something.
 
From what I have heard you cannot overcool an auto tranny. To get the feel of how good you installed it use a temp gauge.
 
I was looking at the Advance Adapters steel braided hoses instead of the hard lines. See any issues with that?

Those would work well. :chug:

From what I have heard you cannot overcool an auto tranny. To get the feel of how good you installed it use a temp gauge.

You need to run a min, temp in an auto tranny for the same reason you need to in your engine. ;)
Auto tranny oil temp from 180-200*, is pretty much what you want.
LG
 
Those would work well. :chug:







You need to run a min, temp in an auto tranny for the same reason you need to in your engine. ;)

Auto tranny oil temp from 180-200*, is pretty much what you want.

LG



Thanks LG. I will add a sensor and gauge for it. But if it is not in that range, it will be difficult to adjust. I assume it would be changing the set up.
 
Can you find an adjustible temp sensor for that range?
You want the sensor mounted to the outgoing side tranny oil line.
LG
 
Can you find an adjustible temp sensor for that range?

You want the sensor mounted to the outgoing side tranny oil line.

LG



Thanks. Yeah I know it needs to be on the outgoing line. But thanks for making sure I don't botch it up.

I am not sure about adjustable temp sensors. I thought they just read the temp. Would they have ones that open and shut as needed like a thermostat?
 
I have seen several off-road rigs with them.
I know Chevy uses them on their 1 ton dually tow rigs, as I have one on mine.
It's part of the HD tow pkg.
LG
 
Good advice guys above.

I would install the largest cooler you can fit in front of your radiator. Measure your available space. Get the biggest sucker you can afford/find/install.

Get the plate and fin style. Don't bother with the less efficient tube and fin style. Those plates cool better.

90% of auto Transmission failures are from heat.

slomo
 
https://derale.com/products/fluid-c...yper-cool-dual-cool-remote-cooler-10an-detail

I have this cooler mounted under the rear floor in front of the fuel tank. It is out of the way and works great with a stock convertor. I have the fans controlled by a thermostatic switch in the Transmission oil pan. I have a higher stall convertor on my GM Turbo 400 that locks up about 1800 rpm or so:

https://www.summitracing.com/parts/...MIm6q23fO71wIV1zaBCh0CVwq6EAQYAiABEgLGWPD_BwE

Lugging it in 2 or 4 high range up the hills 1400-1600 or so rpm continuously will eventually cause the temps to get somewhat high (220 or so), but if I shift to a lower gear and spin it above 2000, it cools just fine. It has never gotten hot running in low range, and it never gets hot running on the street in traffic or whatnot.
 
Thanks. Greats info slomo and PistolDave. I am about to pull the trigger on the cooler and lines. Torn between two locations
 

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