Trans coolers

[BAKNBLK]

I'm looking at 2 different ones, the CSF, #8344 34% Larger Core Volume and 68% more Fluid Volume and the Mishimoto, MMTC-JL-18SL 93% increase in external tube area and 32% overall fin area .

The info they provide doesn't allow comparison so who knows witch one will provide the most cooling.

Anyone install one and has temp drops?

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[Willys41]

I'm looking at 2 different ones, the CSF, #8344 34% Larger Core Volume and 68% more Fluid Volume and the Mishimoto, MMTC-JL-18SL 93% increase in external tube area and 32% overall fin area .

The info they provide doesn't allow comparison so who knows witch one will provide the most cooling.

Anyone install one and has temp drops?

If you want to keep all temps down, coolant, oil and trans install a RPM Extreme JL fan controller.
You will be amazed at how well it works keeping all temps down.
I have been running one for 3 years now and my coolant and oil temps are down by 25 to 30 degrees.
Your jeep has a transmission heater so you will always see temps about the same as the coolant.


A Mopar transmission heater (also known as a transmission warmer or heat exchanger) works as an oil-to-water thermal regulator. It circulates hot engine coolant through a series of passages directly adjacent to the transmission fluid to maintain optimal fluid temperature and viscosity.

How It Operates

• Cold Starts & Warm-Up: When the engine is started in cold weather, the transmission fluid is thick, which causes sluggish shifting and increased wear. The heater uses the rapidly heating engine coolant to quickly warm the transmission fluid to its ideal operating temperature. [1, 2, 3, 4, 5]
• Thermal Bypass Valve (TBV): A built-in thermostat controls the flow. It directs transmission fluid through the heater until it reaches roughly 180°F (82°C). Once the fluid reaches this threshold, the TBV routes the fluid to the external transmission cooler to prevent overheating. [1, 2]
• Cooling Mode: If the transmission works hard and exceeds engine coolant temperatures, the heat exchanger works in reverse, allowing the cooler engine coolant to absorb excess heat from the transmission fluid to prevent it from overheating. [1, 2]

If you are experiencing issues with your transmission heater—such as a coolant leak, a check engine light, or harsh shifting in the cold—provide the model and year of your vehicle to help determine if the thermostat or heat exchanger needs to be

https://store.mopar.com/oem-parts/m...0PdLuwF91hQpZ3xquKYmrhPzDGXe8hj4aAgm5EALw_wcB

http://www.rpmextreme.com/Product/311/Jeep-JL-JT-PWM-FAN-CONTROLLER-.aspx

 

[BAKNBLK]

Ya I know all that... Tazer works just fine and I will never buy anything from RPM.

 

[azjl#3]

So I run hwy 87 PHX to Payson every week all year, currently 102f, 7% climbs AC on, 65-70mph, 35's on 4.1, I never see over 200 on tranny. Using 10w30, I never see over 220 on coolant, oil goes to coolant temp unless i Use 5th last mile, then creeps to 230, cools as soon as i hit summit.

 

[croppz]

Ya I know all that... Tazer works just fine and I will never buy anything from RPM.

May I ask why? Just curious

 

[BAKNBLK]

have my reasons

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