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Starting at $7.95, AutoBuffy stocks 21 drive shaft center support bearings from Anchor, SKF, and DEA. This rubber-encased ball bearing mounts mid-shaft on two-piece driveshafts, holding the shaft in precise alignment while absorbing vibration. When it wears out, the bearing collapses or seizes, allowing the driveshaft to whip and vibrate — eventually damaging the shaft, U-joints, or transmission output seal.
The main decisions are whether to buy the bearing alone or as a complete assembly with the rubber isolator bracket, and whether to choose OE-equivalent or heavy-duty construction. For most owners, a complete assembly is the better value because worn rubber and a worn bearing almost always fail together. If your Gmc Jimmy tows, hauls, or sees off-road use, a reinforced or greaseable heavy-duty unit will outlast a standard replacement.
| Option | Best for | What you get |
|---|---|---|
| Bearing Only (loose ball bearing) | Rebuilders who are re-pressing onto an existing bracket in good condition | Lower upfront cost; requires pressing tools and a serviceable original rubber mount |
| Complete Assembly (bearing + rubber isolator) | Most DIYers and daily drivers replacing a fully worn unit | Bolt-on replacement; new rubber dampens vibration and eliminates a hidden failure point |
| OE-Equivalent Assembly | Drivers who want to restore factory ride quality and noise levels | Matches original stiffness, bracket geometry, and fit; sourced from brands like Anchor, SKF, and DEA |
| Heavy-Duty / Greaseable Assembly | Trucks, SUVs, and vehicles used for towing, hauling, or off-road driving | Reinforced rubber isolator, higher load rating, and a grease fitting for extended service life |
Before unbolting anything, scribe or paint alignment marks across every driveshaft slip joint and U-joint flange so the shaft goes back in the same rotational position. Support the driveshaft with a transmission jack or a length of wire so it doesn't hang and stress the U-joints while you remove the center support bracket bolts. Install the new assembly, torque the bracket fasteners to the manufacturer's specification, realign all marks, and lower the vehicle for a test drive to confirm the vibration is gone.