Heavy Duty Transmission Oil Cooler Kit to suit Mitsubishi Triton MN and MR with 4, 5 and 6 Speed Auto

$495.00 inc. GST $445.50 inc. GST

Bring down the transmission operating temperature to a reasonable level with one of our Heavy Duty Transmission Oil Cooler Kits


Mitsubishi Triton MN and MR Transmission Cooler

What is the best automatic transmission cooler kit? It’s one that combines durability and reliability with outstanding transmission cooling. Our Mitsubishi Triton MN and MR Transmission Cooler allows your transmission to maintain normal operating temperatures even while towing or going offroad and it is both durable and reliable as 4WD’ing in this country demands.

Add 1L Full Synthetic Transmission Fluid

When you are installing the transmission cooler you may want to top-up the transmission fluid.  Select the “Add 1L Full Synthetic Transmission Fluid” option from the drop-down menu to add 1L of Full Synthetic Transmission Fluid.

Single Cooler Features in Icons

Wholesale’s transmission cooler kits are:

  • 4WD tough – Thick 3mm heavy duty steel
  • Strong single piece bracket design – For maximum rigidity even over corrugations
  • Custom designed for the Mitsubishi Triton MN and MR
  • Dual coated – both zinc plated and Mannex Black coated for maximum corrosion resistance
  • High efficiency crossflow transmission oil cooler
  • High temp trans cooler hose and fittings
  • Full DIY installation instructions

Transmission Cooler Tested on Corrugated RoadsControl Your Transmission Temperature

As the largest 4WD transmission specialist in the southern hemisphere we see many failed from other less experienced retailers. It’s one of the reasons we designed and manufactured our very own Mitsubishi Triton MN and MR Transmission Coolers here in Australia for Australian conditions.


  • Never install a multi-piece transmission cooler bracket or one that includes the transmission cooler as part of the bracket structure.  They are prone to fatigue and failure.
  • Never install a stainless steel transmission cooler bracket. Stainless steel induces corrosion in your aluminium cooler. Just google “stainless steel and aluminium” to find out more.

Wholesale is proud of our kits because they are Australian designed and manufactured for our tough, outback conditions. They won’t let you down.

Note! In order to get further control of your transmission temperature you can check out our Transmission Temperature Gauges or Transmission Lock-Up Kits.

Click on the play button below to watch the installation video

Click on the link below to open the installation instructions


Installation Instructions

Customer Reviews

Based on 5 reviews
Ueli Kneubuhler
Transmission cooler MR Triton

Quick shipment easy fit working well, max temp about 5 degrees lower then before.

Thanks for the review Ueli!

Shane Meotti
Great Product

Last year we upgraded our caravan from a 17ft pop top to a 21ft full van and ever since we've experienced auto transmission overheating when towing. I was about to quit the Triton for something bigger but decided to give the Heavy Duty Transmission Oil Cooler Kit a go and I could not be happier. We are just back from a 1200km round trip and didn't have a single issue with the transmission. It now runs noticeably cooler and no more hill fails. Dead simple for a novice mechanic like me to install as well. Great product.

Thanks for the review Shane. It's good to know that the cooler kit was able to help you out with the Triton and allow you to get out towing for some long trips.

Steve L
Transmission cooler MR Triton

Wow, makes a real difference having a second cooler. Great quality product, Easy to install. Only took 2 hours, including the topping up of Transmission fluid, Road testing, and final transmission fluid level check.
If you tow anything with a triton, on a very hot day, up steep hills, GET THIS NOW.

Thanks Steve! Great to know that the cooler is making a real difference for you.

Malcolm Jakes
Mn triton transmission cooler

Great fit awesome instructions great piece of gear

Thanks for the compliment Malcolm. We're glad you're liking your new cooler!

Adrian D'Ambrosio
Absolutely Perfect

I bought this for my MN triton as the transmission was over heating while towing and going offroad. Installation was so simple, just followed the well documented instructions. Post installation my transmission is now 30 degrees cooler than previous. Absolutely perfect and essential for anyone doing heavy towing or even offroading with heavily modified car.