Monroe 90023C1 Air Spring to Coil Spring Conversion Kit - Rear

Air Suspension Conversion for Rear Fitment

Monroe 90023C1 is an air spring to coil spring conversion kit for rear suspension applications on select Ford Expedition and Lincoln Navigator models. It replaces factory rear air suspension with a conventional coil spring setup using application-tuned components for a direct suspension conversion.

The Monroe Air Spring to Coil Spring Conversion Kit line is built for drivers who want to move from air suspension to a conventional spring-and-shock arrangement while keeping vehicle-specific fitment in mind. This kit is part of Monroe’s suspension conversion product line and is engineered around the rear suspension layout on the listed applications.

Key Features

• Converts factory rear air suspension to conventional coil spring suspension
• Application-tuned shock/strut included for the listed vehicle applications
• Premium-grade suspension components
• Mounting hardware included
• Passive design with no adjustable rebound
• Direct fit for rear suspension service on select Ford Expedition and Lincoln Navigator models

Detailed Product Overview

Monroe 90023C1 is intended for rear suspension conversion on 2007-2013 Ford Expedition and 2007-2013 Lincoln Navigator models equipped with rear air suspension. It provides the core components needed to replace the factory air spring system with a conventional coil spring suspension, helping restore a simpler mechanical setup. This part cross-references Monroe Shocks & Struts (e.g., C2529) for the same application.

Fits 2007-2013 Ford Expedition, rear. Fits 2007-2013 Lincoln Navigator, rear. For the Lincoln Navigator application, the vehicle must have rear air suspension. Monroe 90023C1 is also identified as box 1 of 2 and must be used with 90023C2 for the complete conversion on the listed vehicles.

Common Problems This Kit Addresses

• Failed rear air springs causing uneven ride height
• Air suspension leaks that lead to repeated compressor cycling
• Rear suspension sag after air system wear or failure
• Costly maintenance tied to aging air suspension components
• Need to convert from air suspension to a conventional coil spring setup

Installation Notes

Verify rear air suspension configuration before ordering. This kit is for rear use only on the listed applications and must be used with 90023C2 to complete the conversion. Follow vehicle-specific service procedures and inspect related suspension components during installation to confirm proper ride height and alignment after the conversion.

Quality Assurance

Monroe 90023C1 is a premium-grade suspension conversion kit built with application-specific components for the listed Ford Expedition and Lincoln Navigator fitments. The kit includes a passive shock/strut setup and mounting hardware for the conversion application.