3R80-30 – Center Support Bearing – Gm Application – 1.574″ ID – 625″ Center Bearing To Base

3R80-30 is a critical component for maintaining the integrity of your GM driveline, particularly in Cadillac limousines from 1966 to 1985. This center support bearing supports a two-piece driveshaft at its midpoint, ensuring proper alignment and minimizing unwanted vibration. If you’re experiencing driveline vibrations at highway speeds or hearing unusual bearing noise, the 3R80-30 is likely your first suspect.

With a bearing ID of 1.574 inches and a center-to-base height of 0.625 inches, this part is designed to fit seamlessly into your existing setup. The center-to-center distance between mounting holes measures 5.125 inches, which is crucial for maintaining the correct driveshaft operating angle. A misaligned or improperly installed bearing can lead to increased wear and premature failure of your driveline components.

• Ensure no pre-load on the rubber isolator during installation.
• Align the mounting bracket before tightening to prevent misalignment.
• Check driveshaft runout after installation to confirm proper alignment.

Remember, a hardened or collapsed rubber isolator can lead to significant driveline vibration. By replacing your worn center support bearing with the 3R80-30, you restore the necessary support and alignment, ensuring a smooth and quiet ride.