Heavy Duty Transmission Oil Cooler Kit to suit Isuzu MU-X with 5 and 6 Speed Auto (up to June 2021)

$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



Isuzu MU-X Transmission Cooler with 5 and 6 Speed Auto (up to June 2021)

What is the best automatic transmission cooler kit? It’s one that combines durability and reliability with outstanding transmission cooling. Our Isuzu MU-X 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 Isuzu MU-X
  • 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 Isuzu D-Max 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 link below to open the installation instructions


Installation Instructions

Customer Reviews

Based on 5 reviews
Mark Makin

Heavy Duty Transmission Oil Cooler Kit to suit Isuzu MU-X with 5 and 6 Speed Auto (up to June 2021)

Thanks for the 5-star review, Mark. Much appreciated!

lloyd finnemore
Isuzu mux oil cooler kit

Kit arrived promptly and the next day the car was on the hoist.job went smoothly but the bottom bolt in the radiator support panel is a right **** but that’s not your fault.the BEST thing is the instruction book.Its fantastic ,even a dummy like me can do it.

Thanks Lloyd for the 5-star review. The tech guys put a fair bit of effort into the instructions so it's good the hear they were helpful to you!

Wayne Hume

Heavy Duty Transmission Oil Cooler Kit to suit Isuzu MU-X with 5 and 6 Speed Auto (up to June 2021)

Walt Kaeding
Good item

This is a good kit, made to fit. Works great.

Great to hear you liked the kit and it is working well for you. Thanks for the 5 star review Walt!

Don Williams
2019 Isuzu Mux transmission oil cooler

Fitted perfectly & instructions were excellent except for bottom LH mount bolt (not mentioned)

Thanks for the review Don and the feedback on the instructions. The tech team have now updated the instructions to make this clear.