Introduction
The Monroe Monro-Matic Plus 801377 Suspension Strut is engineered to enhance your vehicle's ride quality and extend its service life. This strut incorporates advanced technologies to provide consistent performance and improved handling.

Image: The Monroe Monro-Matic Plus 801377 Suspension Strut, a blue cylindrical component with mounting points.
Key features include:
- Consistent Ride: Velocity Proportional Valving (VPV) technology and all-weather fluid with special additives reduce friction for smooth rod reaction and a smoother ride.
- Reliable Performance: Nitrogen gas-charge maintains tire-to-road contact, improving ride and handling by reducing aeration.
- Restored Ride and Handling: A larger bore provides efficient damping control for consistency and a smooth ride (where applicable).
- Durability: A self-lubricating fluid seal retains gas and minimizes friction against the piston rod, preventing premature wear. A banded piston and bronze-reinforced guide further enhance durability.
- OE Specification: Designed and validated to meet original equipment specifications for consistent performance.
Installation and Setup
Installation of suspension struts requires specialized tools and expertise. It is highly recommended that this product be installed by a certified professional mechanic to ensure proper function, safety, and vehicle alignment.
Safety Warning: Working with vehicle suspension components can be dangerous. Improper installation can lead to serious injury or vehicle damage. Always consult your vehicle's service manual for specific installation procedures and torque specifications.

Image: A mechanic wearing safety glasses and gloves, working on a vehicle's suspension system, installing a strut.
General steps for professional installation typically include:
- Securely lifting and supporting the vehicle.
- Removing the wheel and existing suspension components.
- Carefully installing the new Monroe Monro-Matic Plus strut, ensuring all fasteners are torqued to manufacturer specifications.
- Reassembling the suspension and wheel.
- Performing a wheel alignment after installation to ensure proper vehicle handling and tire wear.

Image: A vehicle raised on a hydraulic lift, showing the undercarriage and suspension components, indicating a professional service environment.
Operating Characteristics
Once installed, the Monroe Monro-Matic Plus 801377 strut functions as a critical part of your vehicle's suspension system. It is designed to:
- Dampen Oscillations: Control spring and suspension movement to prevent excessive bouncing and swaying.
- Maintain Tire Contact: Ensure consistent contact between the tires and the road surface for optimal traction and control.
- Enhance Comfort: Absorb road impacts and vibrations, contributing to a smoother and more comfortable ride.
- Improve Handling: Provide stability during cornering and braking, enhancing overall vehicle control.

Image: A graphic highlighting the key performance attributes of Monroe struts, including consistent ride, durability, restored handling, and reliable performance, with a strut component shown.
Maintenance
Monroe Monro-Matic Plus struts are sealed units and generally require no routine maintenance. However, regular inspection of your vehicle's suspension system is recommended as part of your vehicle's scheduled service.
During inspections, a qualified technician should check for:
- Fluid leaks from the strut body.
- Physical damage to the strut, such as dents or bends.
- Worn or damaged bushings and mounting hardware.
- Excessive rust or corrosion.
Consideration for optional dust boots and jounce bumpers (sold separately) can provide additional protection against dirt, moisture, and severe suspension movements, potentially extending the life of the strut.

Image: A close-up view of a strut's rubber bushing, which helps absorb vibrations and secure the strut to the vehicle.
Troubleshooting
If you experience any of the following symptoms, your struts may require inspection or replacement:
- Excessive Bouncing or Swaying: The vehicle continues to bounce after hitting a bump or sways excessively during turns.
- Nose Dive or Squat: The front of the vehicle dips excessively during braking, or the rear squats during acceleration.
- Uneven Tire Wear: Scalloped or cupped wear patterns on tires can indicate worn suspension components.
- Fluid Leaks: Visible oil or fluid leaking from the strut body.
- Unusual Noises: Clunking, rattling, or squeaking sounds coming from the suspension.
- Reduced Steering Control: A general feeling of looseness or difficulty maintaining control, especially on rough roads.
If you observe any of these issues, it is crucial to have your vehicle inspected by a qualified mechanic promptly. Driving with worn struts can compromise safety and lead to further damage to other vehicle components.
Specifications
| Attribute | Detail |
|---|---|
| Brand | Monroe |
| Model Name | MONRO-MATIC PLUS STRUT |
| Model Number | 801377 |
| Vehicle Service Type | Car |
| Material | Bronze |
| Extended Length | 20.25 Inches |
| Item Weight | 7 pounds |
| Product Dimensions | 20.5 x 6.5 x 6.5 inches |
| UPC | 048598162359 |
| ASIN | B00YZ4F8A4 |
| Date First Available | May 1, 2015 |
Warranty and Support
For detailed warranty information regarding your Monroe Monro-Matic Plus 801377 Suspension Strut, please refer to the documentation included with your purchase or visit the official Monroe Shocks & Struts website. Warranty terms and conditions may vary.
If you require technical assistance, installation guidance, or have questions about product compatibility, please contact Monroe Shocks & Struts customer support directly or consult with a certified automotive technician.
You can find more information and contact details on the Monroe Store on Amazon.




