Ford Ranger PX 2012+ / Everest / Mazda BT50 (2012-2020) PDI Heavy Duty Dual Transmission cooler kit


In addition to our other class leading features (standard in all PDI transmission cooler kits), the 6R80 gearbox fitted to the Ranger/BT50 MUST be fitted with 1/2inch ( 12mm lines) . Do not attempt to adapt smaller lines to work with the transmission as these transmissions require high fluid flow to prevent long term issues.

NOTE: most other Australian supplied transmission coolers kits use 4.5-5.0m of 10mm hose to get from the gearbox to front of the car. They also released them with restrictive, smaller coolers (16,000BTU rated) and when it was realised that their cooling was insufficient for many installs, a second cooler was added IN SERIES, which makes their heat capability close to our unit but too restrictive

By default, all PDI external transmission coolers are designed to be market leading through:

· Maximum efficiency 29,000BTU (energy dissipation unit of measure).

Stacked Plate coolers – this is the best design you can use.

· Steel one-piece brackets (zinc plated and coated) to eliminate flexing of the aluminium cooler.

· High quality transmission cooler hose (rated to 400psi).

· Optimised location with transmission cooler mounted in front of the hot side of the intercooler – this is to ensure it doesn’t put heat straight back into the intake air.

NOTE: A number of other aftermarket systems place their transmission cooler in front of the cold side of the intercooler. We have had a number of retired mechanics realise the effects of this and looking to upgrade their intercooler since the higher intake air temps result in less torque and the transmission come out of lockup, which makes even more heat – they ended up with both intercooler and transmission cooler from PDI.

· Outlets on the side to prevent air locks inside the transmission cooler.

NOTE: Having the outlets at the bottom make the installation easier as the pipes are run down under the radiator, but if you get an airlock (from initial installation empty) there is a strong chance you will never actually fill the top of the coolers with fluid and designed cooler efficiency may never be reached.

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New car manufactures make a car to a price and ensure it meets the expectations of most customers. If you aren’t towing are are running standard power then, quite rightly, you probably won’t be thinking of adding a transmission cooler. If you want to be more scientific, then measure the transmission temperature and decide if you are comfortable with the temperatures you are seeing. If you will be towing a caravan or camper trailer then it is sensible to install an external transmission cooler, to make the transmission last as long as possible by keeping the temperatures down.

The ideal operating temperature for automatic transmission fluid is somewhere between 80 and 110 degrees C. Here’s what can happen above this range:

  • At approximately 115 degrees C, important additives begin to cook in the automatic transmission fluid (ATF). The result is the formation of varnish inside the transmission.

  • At approximately 125 degrees C, internal transmission seals, which are often manufactured from a polyacrylate material, begin to harden. The end results are internal and external leaks as the the seals lose their elasticity.

  • At approximately 145 degrees C, transmission clutch plates begin to slip because the oil is breaking down further.

  • At approximately 160 degrees C, seals and clutches effectively burn out. Carbon forms in the oil and your effectively killed the transmission. Often, a transmission will die within a few thousand km after experiencing 150-plus degree heat.

It is worth noting that the AT temp warning light on a 4 speed auto Landcruiser came on at 150degC and that generally means you are well beyond a safe temperature.


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