31/08/2026
4JJ3 Isuzu D-MAX β Stage 1 + Gearbox Calibration πͺ
These 4JJ3 D-MAXs are a solid platform, but from factory they can feel seriously underwhelming β especially once you start adding the extra weight that comes with a proper touring setup.
This one came to us carrying a fair bit of additional load, making the lack of factory response even more noticeable.
We dialled it in with our custom Stage 1 ECU tune and gearbox calibration, bringing in stronger low-down and mid-range torque, sharper throttle response and much better overall drivability. The gearbox calibration ties it all together with smoother shift points and better use of the additional torque.
The customer is still busy building this rig with plenty more modifications to come, so this isn't the end of the story. Once the next round of supporting mods are fitted, it'll be coming back to us to upgrade the tune and take it to the next level.
For now β safe, reliable gains that make a heavily loaded D-MAX a hell of a lot nicer to drive.
π Wangara, Perth
π² DM us to discuss a tune and gearbox calibration for your D-MAX.
Disclaimer: Performance gains vary depending on vehicle condition, setup and supporting modifications.