TOYOTA fitted the R151F five-speed gearbox to the HiLux SR5 turbo-diesel. This gearbox is set up with different gear ratios to the standard diesel and petrol 4x4 models, to better match engine characteristics and final drive ratio at the differentials. The box is smooth and positive with little vibration through the stick, but the reach into fifth is a bit too long and can cramp your left leg when using the clutch. The HiLux is a part-time 4WD and Toyota uses a part electric, part manual shift aluminium housing transfer case to drive the rear and front differentials with gearing for 2High, 4High, Neutral and 4Low. Shifting in and out of 4H can be done on the move at up to 100km/h at the push of a button. The gearbox and transfer case ratios are well spaced and provide a good range of climbing and descending speeds. But the high final drive ratio of the SR5 turbo-diesel means low range has to be selected on sections that the standard HiLux model would handle in H4 first gear - to avoid riding the clutch. Toyota's electric shift button on the transfer case lever means moves between two and four-wheel drive mode do not involve the lever moving, saving space in the cabin - mainly on the passenger side. The only negative with the drivetrain in the HiLux is the vibration through the transfer case lever, which shudders violently at idle and low speeds. Gear ratios are: First - 4.313, Second - 2.330, Third - 1.436, Fourth - 1.000, Fifth - 0.838 and Reverse - 4.220. Final drive ratio is 3.727:1. Gear ratios differ for 4x4 and 4x2 models and automatic transmission is not available in HiLux 4x4 models.