Aftermarket oil cooler on diesel?

[kbros]

The JT GVW and tow ratings with the 3.0 ecodiesel are lower due to what FCA says are overheating issues. I want to increase my tow and load capacity so I can tow over 6K in the mountains without risking overheating. What are your thoughts on how best to do so? I've been reading about the Mishimoto transmission cooler Model: MMTC-JL-18SL (https://www.mishimoto.com/jeep-gladiator-performance-transmission-cooler-2020.html). Mishimoto claims the following:

• Direct fit for 2020+ Jeep Gladiator JT
• 83% increase in fluid capacity over stock transmission cooler
• 93% increase in external tube area over stock transmission cooler
• 195% increase in internal fin surface area for comprehensive cooling in even the harshest conditions

Comments? Has anyone installed this on their JT diesel and have a real-world report? Any other suggestions on how best to safely increase my tow and load capacity?

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[kevman65]

While it may make your rig run cooler, it will not increase your tow/haul capacity.

 

[MrZappo]

Transmission isn't the only limiting factor I'd think.

 

[Mr._Bill]

The JT GVW and tow ratings with the 3.0 ecodiesel are lower due to what FCA says are overheating issues. I want to increase my tow and load capacity so I can tow over 6K in the mountains without risking overheating. What are your thoughts on how best to do so? I've been reading about the Mishimoto transmission cooler Model: MMTC-JL-18SL (https://www.mishimoto.com/jeep-gladiator-performance-transmission-cooler-2020.html). Mishimoto claims the following:

• Direct fit for 2020+ Jeep Gladiator JT
• 83% increase in fluid capacity over stock transmission cooler
• 93% increase in external tube area over stock transmission cooler
• 195% increase in internal fin surface area for comprehensive cooling in even the harshest conditions

Comments? Has anyone installed this on their JT diesel and have a real-world report? Any other suggestions on how best to safely increase my tow and load capacity?

The vehicle is limited by the size and shape of the front end. The biggest risk is engine overheating. The Jeep Engineers did all they could to achieve maximum towing capabilities. If there was a simple bolt-on solution to increase Towing Capacity, Jeep would have already included it. If you are going to be regularly towing heavy loads, the Mishimoto cooler may extend the life of the transmission, but there is nothing you can do to increase the tow ratings. If you want higher towing capacity, the Sport with the Max Tow package is the only option.

 

[Mac]

You do not need to add anything, the truck meets SAE J2807 standard, if you are towing within the rated capacity I doubt you would be able to overheat it no matter where you are towing.

 

[Abnmarine]

Curious what are the safe oil temps for this engine? I tow a small RPod camper in Florida and have occasionally seen temps up to 238 degrees. It typically stays around 224. It will be interesting to see what the summer heats brings.

 

[WXman]

Engine heat is a big issue on the Jeep, which is why the 2.0L turbo gas engine wasn't offered in the Gladiator. What you're talking about doing addresses the transmission which isn't the issue. The trans. already has two separate coolers. What you need is engine cooling. More airflow.

Having said that, like others have mentioned there is nothing you can do to increase your legal payload or towing. What's stamped on your door jamb placard is all there's ever going to be. The true issue with the diesel is the weight. Weight subtracts from GVWR and the more parts you add to your truck the less payload and towing you'll be left with. So, while you may increase your engine cooling by adding parts, you'll ironically be lowering your towing capacity at the same time.

 

[Tread79]

I am currently out scouting for an Elk hunt in the north rim of the Grand Canyon, units 12A/B and 13A/B. I made the climb to flagstaff, Az from the Phoenix valley and the weather was around 105 degrees. I am towing maybe 3500lbs with gear and two kids and two dogs in the cab. Climbing the steep mountains my truck decreased the power when my temp went up to almost hot on the gage. Once I got far enough altitude and the weather dropped to 80’s the truck went back to full power. So heat is definitely an issue. I would be definitely interested in some additional cooking just so I can tow in the heat where I live. Other than that. The truck has been flawless.

 

[rharr]

I just made that drive last weekend, just me and a small trailer at about 1000lbs. Was able to do 80 up the mtn, and only saw the temp climb a few times when I was working the turbo.

Not the same weight you are pulling.

You could do a oil cooler but the problem is finding a fresh stream of air to wash it with, everything in front of grille is taken up and if you add anything more it will just heat soak what ever is behind it, which is a lot.

The simple answer is turn off the AC when the temps climb.

the complicated answer is try some testing.

Possibly hood vents might help. If you are a experimental type, pull the hood off the jeep, throw it in the back of the truck or trailer and try towing your load again up the hill with no hood, see if the temps are better. If you see a drop in temp then go about adding hood vents.

You can also pull the grill off the jeep for when you plan to do heavy towing. Those vertical slats cover half the radiator, intercooler and condenser surface. Theory being more air on the radiator better heat exchange.

Lastly you can try talking to some radiator shops and see if they can find a custom radiator that has more capacity then OEM and fit into the space.

I suspect one of the issues might just be staying in the turbo to long, the turbo will build a ton of heat which can get the EGR system really hot, and that is what might have really shut you down, I better the system saw really high EGR temps and dialed it back.

 

[jeepin48]

Towing camper at 65mph in 88f weather my JT went into limp mode de-rate. I couldn't attribute it to a specific temp but it would get to 240 engine oil, 220 coolant, 203 trans going up hill. Really annoying to pull over to let it cool down and cycle the key. My error said something about service throttle.

 

[KK4HFJ]

While it may make your rig run cooler, it will not increase your tow/haul capacity.

It would, as it's overheating that caused jeep to derate their towing max. The vehicle is capable of towing 7500 lbs.

 

[Mac]

It would, as it's overheating that caused jeep to derate their towing max. The vehicle is capable of towing 7500 lbs.

If you could make it run cooler there is no way to change the GCWR so it's a moot point.

 

[ajkaz]

If you could make it run cooler there is no way to change the GCWR so it's a moot point.

However its obvious that additional cooling is needed just to tow within the rated limits. This is a real problem and it does need addressed.

 

[Rusty PW]

Towing camper at 65mph in 88f weather my JT went into limp mode de-rate. I couldn't attribute it to a specific temp but it would get to 240 engine oil, 220 coolant, 203 trans going up hill. Really annoying to pull over to let it cool down and cycle the key. My error said something about service throttle.

Oil temp at 240F. The ECU is going into limb mode. The engine oil needs a cooler.

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