What Causes Abnormal Noises in Automatic Transmission Cars?

[SophieFitz]

Automatic transmission cars produce abnormal noises primarily due to bearing wear and damage. Below is an introduction to automatic transmissions: 1. Automatic Principle: The engine's power is transmitted through the transmission, which is also a key factor affecting fuel consumption. Generally, automatic transmissions consume over 10% more fuel than manual transmissions. Whether manual or automatic, more gears mean better fuel efficiency. 2. Driving Tips: For manual transmission cars, it's advisable to shift gears at higher RPMs. Engines are designed to operate at higher RPMs, with parameters like dynamic balance and rotational inertia optimized for these conditions. Prolonged operation at non-standard RPMs increases internal component load and wear, leading to frequent vibrations and knocking, and reduces engine lifespan. Shifting at 3000 RPM ensures post-shift RPMs around 2300, keeping the engine within a healthy operating range.