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Manual transmission mount bushings for your Chevrolet Beretta start at $6.95, and AutoBuffy stocks 3 options from DEA. The bushing is the rubber or polyurethane insert inside the transmission mount that absorbs vibration and holds the transmission in precise alignment. When it fails, you get harsh vibration, clunking during shifts, and driveline stress that can damage adjacent components.
The main decision is material: OEM-style rubber bushings restore stock NVH comfort, while polyurethane bushings offer firmer, more precise transmission location at the cost of slightly more felt vibration. You also need to confirm whether your Chevrolet Beretta uses a single transmission mount bushing or separate front and rear bushings, as some platforms require replacing them as a set.
| Option | Best for | What you get |
|---|---|---|
| OEM-grade rubber | Daily drivers prioritizing a quiet, factory-feel ride | Original vibration damping, easy installation, direct-fit replacement |
| Polyurethane (street) | Performance-oriented daily drivers and weekend drivers | Firmer transmission location, longer wear life, minor NVH increase over rubber |
| Polyurethane (solid/race) | Track or competition vehicles where NVH is not a concern | Maximum transmission rigidity, zero bushing flex, significantly increased cabin vibration |
| Bushing rebuild kit | DIYers reusing the existing mount bracket in good condition | Replacement inserts only, lower cost, requires pressing old bushing out of the bracket |
Support the transmission with a jack before removing the mount bolts so it does not drop when the bushing is freed. Once the mount is out, press or drive the old bushing from the bracket and seat the new bushing fully before reinstalling. Torque all mount hardware to the manufacturer's specification and remove the transmission jack only after all fasteners are secured.