Unraveling the Mystery: Why Does My Truck Shake at 70 MPH?

Experiencing vibrations in your truck when you hit 70 mph can be disconcerting. But what causes this shaking, and how can it be addressed? This comprehensive guide will investigate the reasons behind this common issue and provide solutions to ensure a smoother ride.


Wheel Balance and Alignment

One of the most common reasons a truck shakes at high speeds is an issue with the wheels. This could be due to the wheels being out of balance or misaligned. When your wheels are out of balance, the vibrations can be felt from the steering wheel across the seat and through the vehicle’s floor. Misalignment, on the other hand, could result from something as simple as bumping a curb. Both issues can be resolved by a professional mechanic who can balance and align your wheels correctly.

Engine and Transmission Misalignment

A misaligned engine or transmission is another possible cause of your truck shaking at 70 mph. This occurs when these components are not correctly aligned with the rest of the vehicle, causing vibrations at high speeds. This issue requires professional attention and can be resolved by realigning the engine and transmission.

Brake System and Axle Issues

Faulty brake systems and axle issues can also cause your truck to shake at high speeds. If your brake rotors are warped, or your axle is bent, you may experience vibrations when you hit 70 mph. These issues should be addressed promptly to prevent further damage and ensure your safety on the road.

Spark Plug Misfires

Misfiring spark plugs can also cause your truck to shake at high speeds. If the spark plugs are not firing correctly, it can lead to engine misfires, causing your vehicle to vibrate. Regular maintenance and spark plug replacement can help prevent this issue.


There are several reasons why your truck might shake at 70 mph, including wheel balance and alignment issues, engine and transmission misalignment, brake system and axle issues, and spark plug misfires. Understanding these potential causes can help you identify and address the issue promptly. Regular maintenance and professional inspections ensure a smooth and safe ride.

About the author, Laurence Perkins

Laurence Perkins is the passionate car enthusiast behind the blog My Auto Machine. With over a decade of experience in the automotive industry, Perkins has knowledge and experience with a wide range of car makes and models. His particular interests lie in performance and modification, and his blog covers these topics in-depth. In addition to his own blog, Perkins is a respected voice in the automotive community and writes for various automotive publications. His insights and opinions on cars are highly sought-after.