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Dual External Oil Cooler Kit to suit Isuzu D-Max with 6 Speed Auto (from July 2020)

$595.00 inc. GST

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




Isuzu D-Max Transmission Cooler (Vehicle Build from July 2020)

What is the best automatic transmission cooler kit? It’s one that combines durability and reliability with outstanding transmission cooling. Our Isuzu D-Max 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 2L Full Synthetic Transmission Fluid

When you are installing the transmission cooler you may want to top-up the transmission fluid.  Select the “Add 2L Full Synthetic Transmission Fluid” option from the drop-down menu to add 2L of Full Synthetic Transmission Fluid.

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 D-Max
  • 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
  • DIY installation instructions

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.

Click on the link below to open the installation instructions


Installation Instructions

Additional information

Weight 6 kg
Dimensions 54 × 33 × 15 cm


Would you like 2L Full Synthetic Transmission Fluid?

No, Do Not Add 2L Trans Fluid, Yes, Add 2L Trans Fluid

Customer Reviews

Based on 2 reviews
Shane Hawley
21 Dmax transmission cooler

Well built and designed, and a breeze to fit. And great service and advice.

Thanks for your review! We appreciate your business.

Steve McLeod
Good service,

Ordered cooler for after Aug 2020 build which my MUX is, but not suitable for my vehicle. Ashley very helpful, ascertained the correct cooler and said he will dispatch on receipt of my cooler. Very happy with service so far!