What Causes a Truck to Shake at 70 km/h?

[McAshley]

Truck shaking at 70 km/h can be caused by various factors, such as misaligned front wheel positioning angles or excessive toe-in. During vehicle operation, improper front tire pressure (either too high or too low) or tire imbalance due to repairs can also lead to shaking. Additionally, high speeds may induce vibrations. During maintenance, loose installation of drivetrain components can similarly cause shaking. Truck Driving Tips: 1. Starting: When starting a large truck, ensure proper coordination of the clutch, throttle, and handbrake. Pay special attention to the timing when releasing the handbrake. For uphill starts, hold the clutch engagement point slightly longer and apply slightly more throttle. Since trucks have ample power in first gear, this helps prevent stalling. 2. Shifting: Master the timing of gear shifts to avoid lugging the engine, especially when climbing hills where early downshifting is necessary to maintain sufficient power. Use double-clutching for gear changes and add throttle when downshifting. On descents, engage lower gears and never coast in neutral. 3. Turning: When turning, choose an appropriate angle and account for the inner wheel difference (take wide turns). On consecutive curves where possible, aim for the outside of the turn to reduce centrifugal force. Avoid pumping the brakes during braking maneuvers; monitor air pressure to prevent loss of braking control. 4. Gear Changes: Practice smooth gear transitions. Once the vehicle is on open roads, promptly accelerate to reach a speed slightly higher than the current gear's low range before upshifting. When applying throttle after clutch release, the engine and vehicle should not shake if the timing is correct.