What is this?

[Planerdude]

I can think of multiple reasons, oddly, mpg isn't near the top of my list because the CAFE testing doesn't lean hard on cold performance. It would be a gnat's hair in the grand scheme of things.
To me, I'd want to warm up the seals and the fluid to function more smoothly during shifting, cold fluid can mush up shifts, slow things down, meaning more clutch slippage. Cold seals are more prone to damage and leaking internally (and externally for that matter)
Because people today are more demanding of smooth, consistent shifts, quiet operation, no noises and so on, to allow the fluid to flow through a cooler in 0 degree weather is going to keep the fluid cold and the viscosity higher as well as allowing the seals to have to operate cold for much longer. Plus - like the engine, people commute short distances meaning the transmission never gets warm enough to remove moisture that's naturally in the air and the fluid dies sooner.
For me, I'd want it warmed up and controlled for the life of the fluid and seals and consistent shifting.

I have read on the wrangler forum that in JL, they have eliminated the thermostat in heat exchanger unit, but no i not been able to confirm the same in the JT?

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[ShadowsPapa]

I have read on the wrangler forum that in JL, they have eliminated the thermostat in heat exchanger unit, but no i not been able to confirm the same in the JT?

Would be interesting to know if that's fact or guess.........

 

[Planerdude]

Would be interesting to know if that's fact or guess.........

These are the old and the new type of heat exchanger. My 2021 Mojave, built in October of 2020 has the old style.

 

[ShadowsPapa]

These are the old and the new type of heat exchanger. My 2021 Mojave, built in October of 2020 has the old style.

Now you have me wanting to look at my June 29 2022 build 2022 model year JT........

 

[Planerdude]

These are the old and the new type of heat exchanger. My 2021 Mojave, built in October of 2020 has the old style.

Now you have me wanting to look at my June 29 2022 build 2022 model year JT........

let me know what you find?

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