Volvo VNL Semi Truck & Volvo D13, Cummins ISX etc. Engine FAQs

One of the causes of a shaking front end on a Volvo VNL is a problem with the suspension system. This can include issues such as failed leaf spring bushings or failed cab mount bushings. These components play a crucial role in supporting the weight of the vehicle and absorbing shock, and if they are damaged or worn out, it can cause the front end to shake. Another potential cause of a shaking front end on a Volvo VNL is a problem with the tires. This can include issues such as unevenly worn steer tires or uncentered steer tires. If the tires are not properly aligned or balanced, it can cause the front end to shake or vibrate. A third common cause of a shaking front end on a Volvo VNL is a problem with the brakes. This can include issues such as incorrectly adjusted brake shoes or a damaged brake drum. If the brakes are not functioning properly, it can cause the front end of the truck to shake or vibrate. Other potential causes of a shaking front end on a Volvo VNL include a problem with the steering system, a faulty or damaged drivetrain component, or a problem with the engine or transmission. It is important to thoroughly diagnose the issue and address the root cause in order to fix the problem and prevent it from occurring again in the future. Other Possible Causes In addition to the common causes mentioned in our article, such as issues with the suspension system, tires, brakes, steering, drivetrain, engine, and transmission, there are a couple of other possible causes you may want to consider. Firstly, worn-out cab bushings could be a contributing factor to the vibration you're experiencing. These bushings are designed to reduce vibration and absorb shock, but they can become worn over time, which can cause the front end to shake. Another possible cause of vibrations or shaking while the engine is under load or while the engine brake is active is the rear engine mount cushions. These cushions provide critical support for the engine and drivetrain, and if they are worn or damaged, it can cause the engine to vibrate and transmit that vibration to the front end of the truck.

Remove the access cover for the clutch, if applicable Bar the engine over with a barring tool, or by the alternator (not recommended), until you find a bolt head placed in the middle of a tab (this is the adjustment bolt) Place the correct socket onto the bolt with a ratchet, afterward, press on the ratchet with a pry bar in order to press the bolt head in and begin turning clockwise Begin with 1 full turn and check your adjustment Repeat steps 3 and 4 as necessary