1987 - Current Jeep OEM Custom Transmission Cooler Fitting Kit

1987 - Current Jeep OEM Custom Transmission Cooler Fitting Kit

Item # HH41412

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Tow Ready OEM Fitting Accessories and Parts - HH41412
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Product Images

  • Transmission Coolers
  • Fittings
  • Tow Ready
  • OEM Fitting
Line and fitting is identified by 5/8" O.D. line with a 3/4" wrench size SAE fitting threaded onto it. Call 800-298-8924 to order Tow Ready accessories and parts part number HH41412 or order online at etrailer.com. Free expert support on all Tow Ready products. Guaranteed Lowest Price and Fastest Shipping for 1987 - Current Jeep OEM Custom Transmission Cooler Fitting Kit. Accessories and Parts reviews from real customers.

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  • Reviews (2)
  • Q & A (16)
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Tow Ready Accessories and Parts - HH41412

Line and fitting is identified by 5/8" O.D. line with a 3/4" wrench size SAE fitting threaded onto it.


  • Male hosebarb threads into the transmission line fitting
  • Female hosebarb threads onto radiator fitting

41412 1987-Current Jeep OEM Custom Transmission Cooler Fitting Kit

This Product Fits The Following Vehicles

1987 - 2001 Jeep Cherokee 2.5L I4 Engine

1987 - 1992 Jeep Comanche 2.5L I4 Engine

1997 - 2002 Jeep TJ 2.5L I4 Engine

1987 - 2002 Jeep Wrangler 2.5L I4 Engine

1987 - 1995 Jeep YJ 2.5L I4 Engine

1987 - 2001 Jeep Cherokee 4.0L I6 Engine

1987 - 1992 Jeep Comanche 4.0L I6 Engine

1993 - 2007 Jeep Grand Cherokee 4.0L I6 Engine

1997 - 2006 Jeep TJ 4.0L I6 Engine

1987 - 1990 Jeep Wagoneer 4.0L I6 Engine

1987 - 2006 Jeep Wrangler 4.0L I6 Engine

1987 - 1995 Jeep YJ 4.0L I6 Engine

1999 - 2005 Jeep Grand Cherokee 4.2L I6 Engine

1987 - 1990 Jeep Grand Wagoneer 4.2L I6 Engine

1987 - 1990 Jeep Wagoneer 4.2L I6 Engine

1987 - 1990 Jeep Wrangler 4.2L I6 Engine

1987 - 1990 Jeep YJ 4.2L I6 Engine

1999 - 2003 Dodge Durango 5.2L V8 Engine

1999 - 2001 Dodge Ram Pickup 5.2L V8 Engine

1999 - 1999 Dodge Van 5.2L V8 Engine

1999 - 2003 Dodge Durango 5.9L V8 Engine

1999 - 2002 Dodge Ram Pickup 5.9L V8 Gasoline Engine

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Customer Reviews

1987 - Current Jeep OEM Custom Transmission Cooler Fitting Kit - HH41412

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

Line and fitting is identified by 5/8" O.D. line with a 3/4" wrench size SAE fitting threaded onto it.

- HH41412

Excellent product no issues or leaks after a year , all of your products perform excellent and are of high quality. 277712

- HH41412

The trans cooler and fittings worked great! Install was a breeze and my trans lives much happier. Delivery was quick and packages arrived in good condition. 39438


Ask the Experts about this Tow Ready Accessories and Parts
Do you have a question about this Accessories and Part?

  • Recommended Cooler For A 1999 Jeep Cherokee
  • We currently sell two types of coolers for your 1999 Jeep Cherokee. You can either purchase an engine oil or transmission cooler for your Jeep. I recommend you choose the largest cooler you have space for. Generally speaking, the best place to install an aftermarket cooler is in front of the radiator/condenser behind the grill. For an engine oil cooler, I recommend the Derale Plate-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter part # D15405. The dimensions of this cooler are...
    view full answer...

  • Transmission Cooler Recommendation for a 2000 Jeep Cherokee Towing a 2000 lb Snowmobile Trailer
  • The Derale Transmission Cooler, item # D13502, will be the correct cooler for your 2000 Jeep Cherokee 4door 4x4. This cooler will install in front of the vehicles radiator and air conditioning condenser and is 11 inches Wide x 7-1/4 inches tall x 7/8 inches deep. You should measure to make sure that there is room to install the cooler in this position before you order, but there should not be a problem. You will need to determine how the cooler lines will splice into the transmission...
    view full answer...

  • Recommended Transmission Cooler for 1998 Jeep Cherokee with 4.0 Liter Motor
  • For optimum performance, transmission fluid should be kept below 200 degrees Fahrenheit. I would recommend the Derale Class II Transmission Cooler that you referenced, part # D13502. You will also need the fitting kit, part # HH41412. A transmission cooler is cheap insurance that will protect your transmission from overheating. I have provided a link to a FAQ article and an install video that you might find helpful. The video shows a typical installation on a different vehicle...
    view full answer...

  • Adapter Recommendation for Installing Derale Transmission Fluid Filter 13090 on 2003 Jeep Wrangler
  • For your 2003 Jeep Wrangler you would need to use the Insta-Adapt # D13028 and # HH41412 when installing the Derale Remote transmission cooler # D13090 that you referenced. You would not want to clamp the lines to the filter as that would not work.
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  • Radiator Adapter Fitting Needed to Install Derale Transmission Cooler in 2004 Jeep Grand Cherokee
  • Derale Radiator Adapter Fitting # D13028 will be used along with transmission cooler # D13502 in vehicles that have a 3/8-inch INNER diameter transmission line; adapter part # HH41412 will be used instead if the line has an OUTER diameter of 5/8-inch with a 3/4-inch wrench size SAE fitting.
    view full answer...

  • Transmission Cooler Recommendations for a 2000 Dodge Ram 5.2 Towing a Travel Trailer
  • Derale Transmission Pan Cooler # D14210 for Dodge trucks with the A518, A618 or A727 transmission has a larger capacity than the stock one and has turbulator tubes allow air to flow through to dissipate heat for better cooling. Derale estimates that this cooler can reduce the transmission fluid temperature by as much as 20 to 50 degrees but I would say around 20 is a safe bet. This type of cooler will help with the fluid temperature but a supplemental cooler, # D13504, will be a better...
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  • Installation Time and Difficulty of Installing a Transmission Cooler on a 2003 Jeep Grand Cherokee
  • Depending on the vehicle, and where the transmission cooler, # D13503, is going to be installed, it could take around an hour or longer. There really is not set amount of time because every vehicle is different and different size engines have more or less space and use different fittings. For a 2003 Jeep Cherokee with a 4.7 liter, use Derale Radiator Adapter Fittings, # D13018. For a 4.0 liter, use kit # D13028 for 3/8 inch x 3/8 inch hose splicers, or kit # HH41412 for 5/8 inch-18 S.A.E....
    view full answer...

  • Transmission Cooler Recommendation for a 2001 Jeep Wrangler
  • We offer several transmission coolers that will work on your 2001 Jeep Wrangler. The most popular one is the Derale Transmission Cooler part # D13503. This should do a great job keeping your transmission fluid cool. To make the install easier you might also be interested in the fittings part # HH41412 so that you don't have to cut or flair any lines. We do not offer any that would relocate your transmission filter though. I attached a couple helpful links to the right that you should...
    view full answer...

  • Transmission Cooler for 2004 Jeep Grand Cherokee
  • Transmission coolers like the Derale # D13504 are not actually vehicle-specific; the largest size cooler that you can fit and properly install can be used but adapter fittings may be required. Derale cooler # D13504 is an efficient Class IV type transmission cooler that measures 11-inches wide x 12-inches tall x 7/8-inch deep. As long as you have space to mount the cooler you're ok to install it. Use adapter # D13028 if your transmission hose has an inner diameter of 3/8-inches; use...
    view full answer...

  • Special Radiator Fittings to Install a Transmission Cooler on a 2005 Jeep Wrangler 4.0
  • If I understand correctly, the line from the transmission to the radiator goes through a cavity in the radiator where there is coolant before the end of the line reaches the actual transmission cooler inside the radiator. Is that correct? Otherwise the coolant and transmission fluid would be mixing together and that would be very bad. It sounds like the steel line needs to stay in the radiator and you would cut the hose and use fittings # D13028 instead of fitting something directly...
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  • Should a Derale Transmission Cooler Bypass the Factory Cooler on a 2005 Jeep Grand Cherokee
  • The transmission coolers that we carry like # D13504 are designed to be used as supplemental coolers to work in conjunction with the factory cooler. The flow starts from the transmission, then goes to the factory cooler, and from the factory cooler to the supplemental Derale cooler, and then back to the transmission. Take a look at the video I have linked as an example. I have also included a link to our FAQ article on transmission coolers for you. Depending on what size motor you have...
    view full answer...

  • Will the Derale Combination Transmission and Engine Oil Cooler # D15902 Fit a 2000 Jeep Cherokee
  • Since transmission and engine oil coolers are more of a universal fit you will just need to take the dimensions of the Derale Combination Transmission and Engine Oil Cooler # D15902 and see if you have enough space under the hood of your 2000 Jeep Cherokee for fitment. There isn't really a known temperature to expect from it since that is all relative to where you live, drive, how much weight your vehicle carries, etc... The cooler measures 17" wide x 12-1/2" tall x 3/4" deep so you...
    view full answer...

  • Recommended Transmission Cooler for 2002 Dodge Ram with 5.9L Transmission
  • The return line (transmission inlet) is the upper hose and the outlet is the lower hose. For your transmission cooler, I recommend the Derale Series 8000 Plate-Fin Transmission Cooler Kit # D13503. If you have the 5.9L I-6 turbo diesel, then you don't need adapters. If you have the 5.9L gasoline V-8, then you will need adapter # D13034 or # HH41412. You will want # D13034 if vehicle equipped with 9/16"-24 thread SAE fittings. You will want # HH41412 for 5/8"-18 S.A.E. 45ยบ fittings.
    view full answer...

  • Can a 1997 Jeep TJ Handle 2,500 Pounds Gross Trailer Weight to Tow ATVs and Gear
  • You will want to check the owners manual of the 1997 Jeep TJ for the official towing capacities but I am fairly certain it can handle 2,500 pounds of gross trailer weight. What you will want to add is a transmission cooler since you will be towing in the mountains. The extra weight of the trailer and items in it combined with the hilly mountainous terrain will put a lot of stress on the transmission. Adding a cooler will lower the temperature of the fluid and increase the life of the...
    view full answer...

  • Transmission Cooler Hose Fittings for a 1988 Jeep Cherokee with 4.0L and Automatic Transmission
  • There is a difference between the Derale Radiator Adapter Fittings, # D13028, and 1987-Current Jeep OEM Custom Transmission Cooler Fitting Kit, # HH41412. Basically, the first ones are aftermarket fittings that do not follow the same design as the original factory fittings. On the other hand, Hidden Hitch part does follow the design of the factory fittings. If you look closely, you will notice that the 5/8 diameter described by the Hidden Hitch part, # HH41412, is the outside diameter...
    view full answer...

  • Will Adding Transmission Cooler to 2006 Jeep Wrangler Sport Reduce Transmission Temp
  • Adding a transmission cooler like the excellent Derale Dyno-Cool # D12906 that you referenced will absolutely help cool down the transmission fluid in your Jeep Wrangler. The fluid will cool as it travels through the core of this particular unit by transferring heat out to the fins and the surface area on those fins will allow for proper heat exchange. This should stop the transmission from getting hot enough to trigger warning lights in the Jeep along with just extending its overall life...
    view full answer...

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Info for this part was:

Expert Research:
Michael H
Updated by:
Sarah W
Updated by:
Alexander C

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