Selecting the right gearbox requires precise matching of the OEM Part Number and the Engine Model (e.g., 1KD-FTV, 2GD-FTV, or 1GR-FE). You must distinguish between Manual Transmission (MT) and Automatic Transmission (AT), as well as 4WD vs. 2WD configurations, as the transfer case integration differs significantly. Ensure the housing material is high-grade aluminum alloy for heat dissipation and that the gear ratios align with the specific Hilux generation (Vigo, Revo, or older models) to maintain torque performance.