This tool determines the angular relationship between a vehicle’s powertrain components, specifically the transmission/transfer case, driveshaft, and axle. The numerical result represents the deviation from a straight line through which the driveshaft operates during vehicle use. An example is calculating the difference in angles between the transmission output shaft and the rear axle pinion shaft to ensure proper driveshaft function.
Understanding this angular relationship is crucial for minimizing vibration, preventing premature wear on universal joints (U-joints) or constant velocity (CV) joints, and ensuring efficient power transfer. Incorrect angles can lead to unpleasant noise, reduced component lifespan, and even driveline failure. The concept gained importance with the increasing popularity of lifted trucks and modified vehicles where driveline geometry is often altered from the original manufacturer’s design, thus necessitating angle adjustments.
