Monroe 31000 Suspension Shock Absorber - Front or Rear

Monro-Matic Plus Rear Shock Absorber

Monroe Monro-Matic Plus Shock Absorber 31000 is a rear suspension shock built for older trucks, vans, and SUVs that need controlled ride motion and consistent damping. It uses nitrogen gas charge and Velocity Proportional Valving (VPV) to balance comfort and road control at an economical price.

Compatible With rear applications on Nissan Pickup, Nissan Frontier, Toyota Pickup, Jeep CJ5, and other listed vehicles, this shock absorber is sized for specific rear suspension setups and mounting points. The Monroe 31000 is a direct-fit option for drivers restoring ride quality on classic and late-model utility vehicles.

Key Features

• Monro-Matic Plus shock absorber for rear suspension use
• Nitrogen gas charged for more consistent damping response
• Velocity Proportional Valving (VPV) for improved comfort and control
• Metal dust shield included to help protect the shaft area
• Loop bushing upper and lower mounts with 5/8" bushing ID and 1.5/16" bushing OAL
• Compressed length: 12 in.; extended length: 19.5 in.; travel length: 7.5 in.

Product Details

The Monroe Monro-Matic Plus line is focused on practical ride improvement for everyday driving and restoration work. Part number 31000 uses VPV technology to vary damping response with suspension movement, helping the shock react appropriately to smaller road inputs and larger body motions. The metal dust shield adds protection in exposed rear suspension locations, while the loop bushing mount design supports common OE-style rear shock attachment points.

This part cross-references Monroe Shocks & Struts (e.g., 344015, 344044) for the same application. It is listed for rear fitment on 1995-2008 Nissan Pickup, 1998-2004 Nissan Frontier, 1984-1995 Toyota Pickup, 1982-1986 Jeep CJ7, 1987-1994 Nissan D21, and additional rear applications shown in the fitment data.

What It Helps Address

• Excessive rear-end bounce over uneven pavement
• Loose or unsettled handling from worn rear shocks
• Reduced ride comfort in older Nissan, Toyota, Jeep, Dodge, Ford, and GMC vehicles
• Rear suspension noise caused by worn damping components
• Loss of control during load changes or road transitions

Installation Notes

• Fits rear positions only; verify the vehicle’s suspension configuration before ordering.
• Check compressed length, extended length, and travel length against the original shock dimensions.
• Confirm upper and lower loop bushing mount dimensions match the vehicle’s OE setup.
• Some listed applications include notes such as without Desert Runner Package, without Heavy Duty Suspension, or with specific chassis requirements.
• Use the fitment data to confirm the exact year, make, model, and rear suspension configuration for your vehicle.

Quality Assurance

Monroe engineers the Monro-Matic Plus line for long service life and consistent ride control in everyday use. Part number 31000 is built with nitrogen gas charge, VPV damping, and a protective dust shield to support dependable rear suspension performance across the listed applications.