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What's the reason for the clunking noise from the car chassis?

2 Answers

OGianna

07/29/25 8:46pm

It may be due to loose screws inside the chassis. Here are the relevant explanations: 1. Chassis: The car chassis consists of four parts: the transmission system, the running system, the steering system, and the braking system. The function of the chassis is to support and install the car engine and its various components and assemblies, form the overall shape of the car, receive the power from the engine, enable the car to move, and ensure normal driving. 2. Transmission system: The power generated by the car engine is transmitted to the driving wheels through the transmission system. The transmission system has functions such as deceleration, speed change, reversing, power interruption, inter-wheel differential, and inter-axle differential. Working in conjunction with the engine, it ensures the normal operation of the car under various working conditions and provides good power and economy.

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VonBrandon

08/14/25 6:12pm

My car also had a knocking noise from the chassis before, it felt like driving a tractor, especially when going over speed bumps or rough roads. I suspect it might be due to loose suspension components, such as worn shock absorber or stabilizer bar connections, or possibly a wheel hub bearing issue. Another possibility is that the exhaust pipe heat shield wasn't properly secured and was rattling when hitting bumps. These kinds of abnormal noises while driving aren't just annoying, they're actually quite dangerous - if a part suddenly falls off at highway speeds, it could be serious trouble. I suggest you first park in a safe spot and do a quick visual inspection under the chassis for any obviously loose components, then get it to a repair shop as soon as possible. I made the mistake of putting it off for a week last time, and ended up with a seized bearing that cost me several hundred yuan extra to fix. With older cars, these minor issues need timely attention - they shouldn't be ignored.

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