Side gears, also known as sun gears, are critical components in automotive rear differentials that transfer torque to the drive axles while allowing speed differentiation during turns.
Side gears (sun gears) are bevel gears positioned within the differential case of a rear differential assembly. They mesh with the spider gears (pinion gears) to distribute torque from the ring gear to the drive axles. These gears enable the left and right wheels to rotate at different speeds during cornering, preventing wheel slippage and ensuring smooth vehicle handling. They are essential for power transmission in rear-wheel-drive and all-wheel-drive vehicles.
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Side gears (sun gears) are connected to the drive axles and transfer torque to the wheels, while spider gears (pinion gears) rotate within the differential case and mesh with the side gears to allow speed differentiation during turns.
Yes, worn or damaged side gears can lead to uneven torque distribution, excessive backlash, noise (whining or clunking), and poor handling during turns due to improper wheel speed differentiation.
They are typically forged or machined from alloy steel, then heat-treated (carburized or nitrided) for hardness. Precision grinding or honing ensures accurate tooth geometry and surface finish.
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