Is your Toyota showing signs of excessive transmission temperatures, A Just Autos ECU lock up will aid in reducing transmission temperatures by locking the transmissions converter under high load situations. A Just Autos lock up kit is purely ECU based which means no added wiring or modules which means higher reliability while touring the country
At Just Autos, we specialise in unlocking every bit of potential from your Toyota diesel—and that includes your automatic transmission. A lock-up kit gives you better control, crisper shifts, and significantly reduces heat and converter slip. Whether you’re towing, touring, or just want your rig to feel tighter and more responsive, a lock-up kit helps your transmission run cooler and your engine work smarter—not harder. It’s one of the smartest upgrades for anyone serious about performance and longevity.
At Just Autos, we’ve engineered our airbox upgrade solutions to address common airflow and filtration challenges faced by Toyota diesel vehicles across Australian conditions.
As one of Australia’s leading diesel performance specialists, Just Autos is trusted by 4WD owners across Queensland and beyond. From our headquarters in Nambour on the Sunshine Coast, we’ve built our reputation on precision engineering, vehicle-specific tuning, and real-world performance insight.
Contact our team today to explore the ideal lock up solution for your Toyota diesel*.
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Watch YouTube video Here
Watch YouTube video Here
Watch YouTube video Here
A lock-up kit gives you control over when the torque converter locks up—reducing slip, lowering transmission temps, and improving throttle response. It creates a more direct connection between the engine and the wheels, especially useful during towing or highway driving.
By eliminating unnecessary converter slip, fuel efficiency is often improved—particularly on longer trips, while towing, or when cruising at steady speeds.
Just Autos kits are designed to integrate seamlessly with your existing transmission setup, but we recommend pairing it with one of our custom tunes for the best possible result.
Yes—depending on your vehicle and setup, we offer both automatic and driver-selectable options (via manual mode or custom switch control) for when and how lock-up is activated.
