• Isuzu Dmax / MU-X / BT50 2021+ Trans Cooler Kit - HPD - Common Rail Cowboys
  • Isuzu Dmax / MU-X / BT50 2021+ Trans Cooler Kit - HPD - Common Rail Cowboys
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High Performance Diesel

Isuzu Dmax / MU-X / BT50 2021+ Trans Cooler Kit - HPD

Isuzu Dmax / MU-X / BT50 2021+ Trans Cooler Kit - HPD

$911.04 AUD
$911.04 AUD
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Isuzu Dmax / MU-X / BT50 2021+ Trans Cooler Kit - HPD

Keep transmission temps stable under load. Tow smarter. Drive longer.

✅ Bar & Plate 300×200×50 mm | ✅ Stainless Brackets | ✅ CNC Adaptor Plate | ✅ Free Express AU Shipping

🧩 Product Overview

HPD has you covered for reliable transmission temperature control. Many OEM setups route trans oil through the radiator or a coolant heat exchanger, which can raise engine temps under load and risk coolant–ATF cross-contamination if a failure occurs.

HPD’s oil-to-air transmission cooler uses a robust bar & plate core designed and tested to maintain stable temps during hard towing, hot ambient conditions, and off-road work.

💡 Why Upgrade from OEM Cooling?
  • Avoids mixing engine coolant and ATF in the event of radiator/heat-exchanger failure
  • Reduces thermal load on the engine’s cooling system when everything is working hard
  • Dedicated airflow equals more consistent transmission temps under sustained load
🏆 Key Benefits
  • Reduced / stable transmission temperatures
  • Prolongs transmission oil life
  • Lowers engine coolant temperatures
  • Reduces stress / strain on transmission components
  • Can improve fuel economy when towing
  • Helps extend overall transmission service life
⚙️ Kit Features
  • Bar & Plate Core: 300 × 200 × 50 mm
  • Mounting: Laser-cut stainless steel bracketry
  • End tanks: CNC-machined
  • Adaptor: Billet CNC adaptor plate
  • Hoses: 10 mm ø oil hose included
  • Fittings & hardware: Hose tail fittings, support clamps, insulation, nuts, bolts, washers
  • Documentation: Installation instructions included
📦 What’s in the Box
  • HPD bar & plate transmission cooler (300×200×50 mm)
  • Vehicle-specific stainless brackets
  • Billet CNC adaptor plate & hose tails
  • Oil hose (10 mm ø), clamps & insulation
  • All mounting hardware (nuts/bolts/washers)
  • Fitting instructions
🛠️ Installation Notes
  • Professional install recommended for safe and reliable operation
  • Route hoses away from hot / moving components; secure with supplied clamps
  • After first drive and heat cycle: re-check all fasteners and hose clamps
  • Top up / bleed transmission fluid as per OEM procedure and verify level at temperature
💳 Payment & 🚚 Shipping
  • Buy now, pay later with Afterpay, Humm, Klarna & Zip
  • Free Express Shipping Australia-Wide — fast, trackable dispatch

Frequently Asked Questions

Is this a direct-fit kit for 2021+ D-MAX / MU-X / BT-50?
Yes — brackets and adaptor are designed around the 2021+ platform (4JJ3-based) for a clean, bolt-on install.
Do I need to tune the transmission after fitting?
No tune is required to run the cooler. If your tuner adjusts shift strategy/line pressure for towing, the cooler complements those changes by managing heat.
Where is the cooler mounted and will it affect A/C or engine temps?
Typically mounted forward of the radiator/AC condenser with dedicated airflow. By removing ATF heat from the radiator circuit, engine coolant temps can improve during towing.
What fluid should I use and how much extra capacity does it add?
Use OEM-spec ATF for your transmission. Capacity increase is modest (varies with hose routing); check level at the specified temperature after bleeding.
Will this void my warranty?
Aftermarket parts may affect warranty. Keep records of professional installation and servicing; check with your dealer/insurer for guidance.
Is this compatible with factory tow packages and bull bars?
Yes in most cases. Very large bull bars/winches may reduce frontal airflow; ensure the cooler has clear airflow or consider ducting.

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