SA54-25-28B is a critical component for maintaining driveline integrity in various applications. This center support bearing features a 1.102″ ID and a center-to-base height of 2.750″, making it essential for supporting two-piece driveshafts. When this bearing fails, you may notice vibrations at highway speeds or hear bearing noise, which are clear indicators of a worn or collapsed rubber isolator. The rubber isolator is designed to absorb vibrations; if it deteriorates, it can lead to excessive driveline vibration and misalignment.
Proper installation is crucial for the longevity of the SA54-25-28B. Ensure that you do not pre-load the rubber during installation and align the mounting bracket before tightening. This will help maintain the correct driveshaft operating angle and prevent further issues. If you experience a 2x-per-revolution vibration that disappears in neutral coast, the center support bearing is often the first suspect. The critical dimensions of this bearing, including the 7.000″ center-to-center mounting hole spacing, are designed to restore proper alignment and reduce whip.
- 1.102″ Bearing ID
- 2.750″ Center Bearing To Base
- 7.000″ Center To Center Of Mount Holes
- Install without pre-loading the rubber isolator
- Align mounting bracket before tightening
Replacing a failed center support bearing like the SA54-25-28B is essential for restoring smooth operation and preventing further driveline damage.
