Rear Propeller Shaft — OEM 5F9Z4R602AA / 5F934K145AE for Ford Five Hundred & Compatible Models

This rear propeller shaft (driveshaft) is an OEM replacement for the Ford Five Hundred, Freestyle, and Mercury Montego models, with cross-reference part numbers 5F9Z4R602AA, 5F934K145AE, and Dorman 936-8. The propeller shaft transmits torque from the transmission output to the rear differential in all-wheel-drive and front-wheel-drive configurations — this is a two-piece driveshaft design with a center support bearing and three universal joints (two at the shaft ends and one at the center coupling). The shaft tubes are manufactured from DOM (drawn-over-mandrel) steel tubing with a wall thickness of 2.0mm, precision-balanced to ISO 1940 G16 specification at 4,000 RPM — this balance grade ensures vibration-free operation at the Five Hundred’s maximum driveshaft speed of approximately 3,500 RPM at highway cruising speed (120 km/h). Each universal joint is a greasable cross-type design with hardened bearing caps (HRC 58-62) and needle roller bearings, providing approximately 150,000 km of service life with proper greasing at 50,000 km intervals.

The most common failure point on the Ford Five Hundred driveshaft is the center support bearing (also called the carrier bearing). This bearing supports the center coupling between the front and rear shaft sections and is mounted in a rubber-isolated bracket bolted to the chassis floor. The rubber isolation deteriorates over time from exposure to road salt, heat from the exhaust system, and ozone — when the rubber loses its elasticity, the bearing is no longer held concentric with the driveshaft centerline, causing a low-frequency vibration (typically 30-60 Hz) that is felt through the floor and seats rather than the steering wheel. The second most common failure is the front constant-velocity (CV) joint at the transmission end — this joint allows the driveshaft to articulate as the engine and transmission move on their mounts. A worn CV joint produces a clicking noise during acceleration from a stop that is often misdiagnosed as a failing axle shaft CV joint. When replacing the driveshaft, the transmission output shaft seal should always be replaced simultaneously — the original seal will have taken a compression set against the old CV joint boot and may leak against the new boot surface. Common failure symptoms: vibration in the floor and seats at 50-70 km/h that changes with throttle position (failed center support bearing), clicking noise during acceleration from a stop (worn CV joint), and a rhythmic thumping noise that matches wheel rotation speed (driveshaft out of balance from a lost balance weight).

This driveshaft fits Ford Five Hundred (2005-2007), Ford Freestyle (2005-2007), and Mercury Montego (2005-2007) with all-wheel-drive or front-wheel-drive configurations. Verify OEM numbers 5F9Z4R602AA or 5F934K145AE on your existing driveshaft identification tag before ordering.

Technical Specifications

• Part Numbers: 5F9Z4R602AA, 5F934K145AE, Dorman 936-8
• Design: Two-Piece with Center Support Bearing, 3 Universal Joints
• Shaft Material: DOM Steel Tubing, 2.0mm Wall Thickness
• Balance Grade: ISO 1940 G16 at 4,000 RPM
• U-Joint Type: Greasable Cross-Type, Hardened Caps HRC 58-62
• Application: Ford Five Hundred / Freestyle / Mercury Montego (2005-2007)

Compatible Vehicle Models

Each driveshaft is factory-balanced and inspected for U-joint articulation and center bearing preload, packed in protective packaging, and ships within 1-2 business days. 12-month warranty.