Trans coolers

[caryt]

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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[Bandit’s Lair]

Not that particular item, but I’ve run Mishimoto products in the past on different vehicles. They’ve always been really good quality on the construction side and function side.

 

[CrazyCooter]

I haven't felt the need for an upgraded trans cooler? Temps seem to be pretty consistent and only climb a couple of degrees on hard climbs, towing heavy, and in temps over 100°?

I feel like if I was given a trans cooler for free, I would never install it?

 

[Vtur]

Highest i’ve seen mine is 220 degree while climbing switchbacks up to 10k feet elevation.

 

[CrazyCooter]

Highest i’ve seen mine is 220 degree while climbing switchbacks up to 10k feet elevation.

I cant say I've even seen mine that high.......seems like 205-208 sustained while towing heavy at 100°ish ambient, climbing to maybe 217° on some hard pulls, but drops right back down to 205° afterwards.

Now if a trans cooler could reduce heat load from the coolant or transfer heat out.......I'd be in! New low temp thermostats or thermostat deletes are pretty common for the Rams and Grand Cherokees, but I haven't seen anything offered for a JL/JT? May be interchangeable, but wouldn't they be marketed as such if it was?

 

[Bandit’s Lair]

Now if a trans cooler could reduce heat load from the coolant or transfer heat out.......I'd be in!

Ok……. If this isn’t what an aftermarket transmission cooler does then I’ve been duped for the last 25-30 years of my life. Did I miss a memo again?

 

[CrazyCooter]

Ok……. If this isn’t what an aftermarket transmission cooler does then I’ve been duped for the last 25-30 years of my life. Did I miss a memo again?

What good is a larger cooler when there is a "Warmer" inline that will regulate the temp anyway? Have you not noticed the trans temp is pretty much the same at 10° as it is at 100°? Jeep designed the system to run about 200°?

A more efficient cooler may actually do nothing if installed by itself?

 

[Bandit’s Lair]

The warmer only warms to nominal operating temp. 140-190(?) to my understanding. Then it becomes a heat exchanger/extractor. If a transmission cooler can keep it closer to that range than the 200+ I’d think it is worth it. Most of em add a bit more fluid as well so that’s a bonus to longevity. This is all going to be user subjective though.

 

[CrazyCooter]

The warmer only warms to nominal operating temp. 140-190(?) to my understanding. Then it becomes a heat exchanger/extractor. If a transmission cooler can keep it closer to that range than the 200+ I’d think it is worth it. Most of em add a bit more fluid as well so that’s a bonus to longevity. This is all going to be user subjective though.

Try it and let us know!

I haven't replaced the radiator or trans cooler because I'm not convinced it will result in anything more than a lighter wallet?

I've also pretty much quit traveling with a load when it's over 100° these days.

 

[CrazyCooter]

Another thing that makes me think that a more efficient cooler alone would be a waste is that trans temps don't track with coolant temps? When coolant has hit 248° in the past, trans is still under 220°?

 

[kb5zcr]

Here you go.

 

[caryt]

Every single trans in every truck car etc has a system, usually rad fluid to heat the trans fluid to normal operating temps. Then the trans fluid goes to a air to fluid cooler. As shown 220*+ isn't normal or recommended. I want the largest best cooler I can fit to maintain 200* or lower under any conditions where I travel.

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