Retaining ring (Maserati ATC)

The retaining ring (or snap ring) is a critical fastener made of spring steel designed to hold bearings securely in place on the shaft. It prevents axial movement, ensuring that the internal components of your Maserati ATC transfer case stay aligned during high-torque operation.

Mechanics generally recommend using a new retaining ring. Because these are made of spring steel, they can lose their tension or become slightly deformed during removal. Installing a new ring ensures a tight, reliable fit that won’t snap or slip under pressure.

Signs of failure often include unusual clicking or grinding noises, especially during acceleration or gear shifts. If a ring fails, a bearing might shift out of place, leading to vibration or even catastrophic internal damage to the ATC unit.

This retaining ring is specifically designed for the Maserati ATC series transfer cases. To ensure a perfect fit for your specific VIN or year, we recommend checking the dimensions of your shaft-mounted bearings against the ATC specifications.

You will need a pair of quality snap ring pliers (specifically designed for the style of the ring, either internal or external) to properly expand or contract the spring steel without overstressing the metal.