Transmission Support Rubber Mount Assembly

This drivetrain mount is needed to hold the transmission in the correct position while isolating vibration. It keeps the powertrain stable during gear changes, acceleration, and braking, so the cabin feels smooth and the driveline stays aligned.

How it works ⚙️

Inside the mount, a reinforced rubber insulator bonds to metal brackets. The rubber flexes to absorb engine and gearbox movement, while the metal structure limits excessive travel. This balance reduces harshness and protects nearby parts from stress.

What happens if it’s worn or broken

A failed mount lets the transmission shift too much. You may notice clunks on takeoff, vibration at idle, rough shifting, or banging when changing from Drive to Reverse (or during clutch engagement on manuals). If ignored, it can strain CV joints, exhaust flex sections, hoses, wiring, and even cause misalignment that speeds up bushing and axle wear.

When to replace ️

• Visible cracks, separation, or collapsed rubber
• Excessive drivetrain movement under throttle
• New vibrations after starts or shifts

Compatibility ✅

• Civic
• Civic Gx
• Civic 4D