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Heavy Duty Transmission Oil Cooler Kit to suit Isuzu D-Max MU-X with 5 Speed and 6 Speed Auto (Vehicle Build BEFORE July 2020)

$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 D-Max and MU-X Transmission Cooler (Vehicle Build BEFORE 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 and 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.

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 and 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

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 and MU-X 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

Additional information

Weight 3.5 kg
Dimensions 54 × 33 × 15 cm


Would you like 1L Full Synthetic Transmission Fluid?

Yes, Add 1L Trans Fluid, No, Do Not Add 1L Trans Fluid

Customer Reviews

Based on 14 reviews
Happy customer

Awsome product we’ll made and to deal with was amazing so fast and speedy with reply’s and even recived the product the next day I perth WA and that never happends
So thanks heaps guys

You're most welcome Robbie! Thanks for the review.

Alex Herrmann
A must for towing.

Just towed a 2.9 ton load up the gillies range. ATF temp max was 105 deg. 19 km climb of 800 m. 260 corners.

Thanks for the review Alex! Glad the cooler is making a great difference for your towing.

Lloyd Hurlock

Got a transmission cooler for my D-max 18 auto installed easy every thing fitted like it should the first time and the manual expanded everything well. Thank you

Thank you very much for the review!

Leonard Gallina
excellent quality product

Fitting instructions easy to read and cooler was easy to fit, i highly recommend automatic wholesale products

Thanks for the review!

Piet Vlok
Auto transmission oil cooler for isuzu d'max.

I'm very happy with my cooler. Good quality and work 100%. I would recommend this cooler as a must when you use your vehicle for towing and driving mountains and long inclines. Thank you Wholesale Automatic Transmission company for an excellent product!

Thanks a lot for your review. Glad you like the product!