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Transcoolers
Upgrading your transmission cooler on your 4WD is a no-brainer—especially in Aussie conditions
Heat is the number one killer of automatic gearboxes. Towing a caravan or boat, crawling in low range, beach driving, or slogging it out on hot days all push transmission temps through the roof. Once the fluid gets too hot, it breaks down fast, loses its ability to protect, and that’s when clutches start slipping and gearboxes die early.
A HPD transmission cooler keeps temps under control, even when you’re working the rig hard. Cooler oil means smoother shifts, better towing performance, and way less stress on the internals. It also helps stop that burnt-oil smell and the dreaded limp mode when temps spike.
The payoff? Longer gearbox life, fewer expensive repairs, and more confidence when you’re loaded up or off the beaten track. Compared to the cost of a transmission rebuild, installing a HPD Transcooler is cheap insurance—and it’s one mod you’ll be glad you did every time you hitch up or hit the tracks.
HPD Transcoolers are extremely popular because they are proven to reduce transmission destroying temperatures.
In our thorough dyno testing of a 2021 Isuzu D-Max, we recorded a drop in the transmission oil temperature of 13°C.
This significant temperature reduction was achieved despite a rise in ambient air temperature of 10°C after the transcooler was installed later in the day.
Even better cooling in real-world environments
Some customers report even better results. For example David’s Scan Gauge III showed an incredible 52°C reduction in transmission oil temperature towing his 24ft caravan.
Without a HPD Transcooler, David’s transmission oil temperature was a frightening 116°C towing his 2600kg caravan up a hill.
After fitting a HPD Transcooler, David recorded his transmission oil temperature at 64°C, driving up the same hill on a 26°C day.
A 50 mm thick bar-and-plate core transmission cooler offers a big step up in heat control, especially for hard-working 4WDs. The thicker core increases internal oil capacity and surface area, allowing more heat to be absorbed and shed efficiently, while the bar-and-plate construction is tougher and more resistant to vibration and stone damage than tube-and-fin designs.
This means more stable transmission temperatures when towing, touring, or driving in soft sand, helping prevent heat-related fluid breakdown and extending transmission life. The result is smoother shifting, better protection under load, and peace of mind knowing your transmission can handle harsh Aussie conditions without cooking itself.
HPD kits are designed for maximum ease of fitment in your shed or driveway with basic tools.
When you receive your HPD product, it comes with absolutely everything required to fit to your vehicle. Every pipe, hose, bracket, nut and bolt is included as well as easy to follow, comprehensive instructions.
If you have any difficulties, we're just a phone call away to provide you with the support you need.
What People Are Saying About
★★★★★
"A1 customer service! Highly recommended. Fast, friendly, efficient service. Rob was super helpful and was prompt in fixing the issue I had without question."
★★★★★
"Blown away with the service and quality
I recently purchased a intercooler for my Ranger FX4 2020 as well as a transmission cooler
Didn’t end up using the transmission cooler and had no problems when I called up and asked if I could return it. Unopened still in the box
The intercooler is a beast and has made a huge difference in the car
Very easy to work with over the phone"
★★★★★
"Had the unit installed by Kittles Parafield. The mechanics said it was a easy kit to install. Directions were super easy. Very happy with the cooler now. Has made a difference towing with engine temp staying cooler."
★★★★★
"Always have such a positive experience with HPD. Service is amazing, team is extremely knowledgeable, they go above and beyond to help me out every time. They process orders and ship them super fast, bloody legends"
★★★★★
"Very supportive team. I had an issue with the standard length of intercooling pipe due to a unique engine bay setup and the team was easily contactable, knowledgeable and very helpful. The workmanship of the welding was very impressive."
★★★★★
"I had a PX Ranger plastic catch can from another company and have never really been happy with how it was installed. Extra hoses and elbows, brackets that worked but weren’t really great. Seen a picture of the HPD catch can and thought it looked a much tidier install. A little bit more expensive than the plastic one but I bit the bullet and purchased one.
It turned up and wow, what a quality piece of gear, beautifully cnc machined can and hose tails, laser cut stainless brackets. Certainly looks the goods that for sure. So the install was super easy and how neat it is, uses the original hose, just cut a centre section out and it connects up.
Overall, this kit is a fantastic piece of engineering, well thought out and workmanship top notch."
★★★★★
"I purchased an EGR Delete Kit for a 2015 Volkswagen Amarok 2.0 TDI from Melbourne. The staff promptly replied to my email inquiry prior to purchase, and the parcel was delivered well within said timeframe. As for the product quality, the kit comes with basic instructions on how to do the easy job. Very happy customer! Thanks"
★★★★★
"Top-Notch Product and Service!
I recently ordered a billet oil catch can from HPD over the phone, and I couldn’t be more impressed. The customer service was fantastic—friendly, knowledgeable, and efficient. The product was shipped out immediately, and I was amazed when it arrived the very next day!
The quality of the system is outstanding, and the installation was a breeze—took me only 20-30 minutes. Honestly, I wish I had installed this years ago!
Huge thanks to HPD for providing such an excellent product and a great overall experience. Highly recommended!"
★★★★★
"Super helpful!
Karl in the sales department helped me out with all my questions and making sure I got the right kit!
Will definitely be ordering more parts from them and recommend them to other possible customers!"
★★★★★
"Thanks HP diesel for providing me with a top quality Intercooler kit for my BT50, comprehensive fitting instructions, super fast delivery good communications and proudly Aussie made supporting our jobs, thankyou Roy"
