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Heavy Duty Transmission Oil Cooler Kit suit Holden Colorado with 6L50 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



Holden Colorado Transmission Cooler

What is the best automatic transmission cooler kit? It’s one that combines durability and reliability with outstanding transmission cooling. Our Holden Colorado Transmission Cooler allows your transmission to maintain normal operating temperates 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 Holden Colorado
  • 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 Holden Colorado 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 (full install)


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 4 reviews
Robert Munn
Colorado trans cooler

Great service, Easy to fit, very effective

Thanks for the 5 star review. Glad you're enjoying the product.

stephen gray
Colorado Trans Cooler

Great cooler brought temps down

Thanks for the review!

Very happy customer

Transmission oil cooler is well made, easily fitted, and works very well. Towing 2.9t caravan the transmission oil temperature was getting high, Cooler has dropped it by 15 degrees.

Great to see the product working well for you. Thanks for the review!

Peter Martinac
Transmission Cooler installed before holiday

Installed my transmission cooler on my Colorado just before my holidays. Went away for 2 weeks on holidays towing a 2 tonne camper stayed 15c cololer then previous and stayed around 80c. Vary pleased with the results.
Installed the transmission cooler myself and the instructions from Wholesale Automatic was well set out, easy to follow well done for making it an easy DIY.

It's great that the cooler is really making a difference for you. Thanks for the review.