3R80-25 – 25 – Center Support Bearing – 1.574″ ID – 3.500″ Center Bearing To Base

The 3R80-25 center support bearing supports the midshaft section of a two-piece driveshaft, keeping it running concentric with the vehicle's drivetrain axis. When this bearing fails, the midshaft droops and the driveshaft angles change — you'll feel it as a vibration that gets progressively worse at highway speed. The 3R80-25 center support bearing is the correct replacement for GM series applications, with the exact inner diameter and mount hole spacing your application requires.

3R80-25 Center Support Bearing — GM Series Dimensions & Mount Specs

The 3R80-25 center support bearing specs: 1.574" inner dia | 3.500" center-to-base | 2.250" mount spacing. Cadillac Buick. Application: GM series. Inner diameter must match the midshaft stub OD exactly — a loose fit allows the bearing to walk on the shaft, which causes vibration and accelerates wear on both the bearing race and the shaft surface. Mount hole center-to-center spacing must match your crossmember bracket.

When replacing a center support bearing on a two-piece shaft, replace the complete assembly — bearing race, rubber isolator, and bracket together. A new race in an old hardened rubber mount still vibrates. The rubber isolator is what actually absorbs the midshaft movement; without it the bearing transmits every frequency directly to the frame.

Key Features

• Application: GM series — verify your driveshaft series matches
• Bearing inner dia: 1.574" — must match midshaft stub OD exactly
• Center-to-base: 3.500" — height from shaft centerline to mounting surface
• Mount hole spacing: 2.250" — must match crossmember bracket exactly
• Complete assembly — bearing race, rubber isolator, and bracket as one unit
• Rubber isolator included — absorbs midshaft vibration, reduces NVH to frame
• Note: Cadillac Buick

Specifications

• SKU: 3R80-25
• Brand: UDS
• Application: GM Series
• Bearing ID: 1.574"
• Center to Base: 3.500"
• Mount Hole Spacing: 2.250"
• Notes: Cadillac Buick