5R55S 2004-2008 Ford Explorer, Sport Trac, Mercury Mountaineer 4.0L RWD – Remanufactured 5-Speed Automatic Trans

Description

Tailored for rear-drive midsize haulers, this Ford Explorer RWD 2004-2008 Remanufactured Transmission channels 4.0L Cologne V6 power straight to the rear wheels. The 5-Speed RWD platform supports 210 horsepower and 254 lb-ft of torque up to 5,500 RPM. Working hydraulic line pressure peaks at 220 PSI to prevent clutch slippage across spirited highway transitions.

A thick cast aluminum case encloses carburized 8620 steel helical gear sets and planetary gearsets designed to operate quiet under load. Segmented graphite friction plates pair with nitrided steel reaction separator plates to resist clutch glazing. The remanufactured valve body features hardened steel sleeves and an oversized mainline pressure regulator spool. Dry unit weight measures 170 lbs, supporting a 10.0-quart fluid capacity with 3/8-inch threaded inverted flare transmission cooler ports.

Key Features of Ford Explorer

Independent repair shops buy Ford Explorer 2004-2008 remanufactured transmission inventory to cure torque converter shudder and resolve shift flare between forward gear ranges. The complete remanufacturing process installs updated internal friction packs and recalibrated hydraulic circuits for long-term road endurance.

• 24-spline turbine input shaft handles continuous V6 torque without spline distortion.
• Explorer 2004-2008 replacement valve body stops internal pressure loss during gear upshifts.
• 5 forward gear ratios provide brisk low-end acceleration alongside peaceful highway cruising.
• Hardened steel planetary carriers handle torque spikes without pin deflection or gear hum.
• 2004-2008 Explorer gear train module features ground tooth profiles to curb gear hum.
• Nitrided clutch reaction plates prevent heat coning under repeated wide-open throttle passing maneuvers.
• Computer-tested pulse-width solenoids maintain crisp gear engagement across all driving conditions.

Two Wheel Drive Hydraulics

Operating hydraulic circuit line pressure holds between 180 and 220 PSI via electronic pressure regulator solenoid modulation. Sump oil temperatures remain within 168°F to 194°F during continuous high-speed transit. The 5-Speed gear reduction spans from a 2.47:1 1st gear ratio down to a 0.75:1 5th gear overdrive step, lowering cabin noise levels and reducing cruising fuel consumption. High-capacity internal fluid galleries cycle lubricant through remote radiator heat exchangers to stop fluid breakdown during warm weather driving.

Mountaineer Slip Yoke Centering

A precision-machined 27-spline rear output shaft links straight to the driveshaft slip yoke. Dial indicator measurements confirm tailstock bearing radial runout remains under 0.0015 inches. The chassis crossmember mounting pad rests exactly 22.5 inches from the engine block mating plane. Factory pilot flange diameter guarantees centered installation and prevents high-speed driveline harmonics.

Midsize SUV Bench Testing

Every rebuilt transmission undergoes computerized dyno load testing with heated ATF fluid to verify shift timing, line pressure stability, and clutch holding power under load. This transmission is not engineered for track drift events, big-turbo engine builds, or drivetrains running un-flushed transmission fluid cooling systems.

• Inspect transmission pan fluid level through inspection port every 30 operating days.
• Replace synthetic automatic transmission fluid and internal filter screen every 30,000 miles.
• Inspect rear output seal and driveshaft U-joints every 12 months.

Rear Drive Freight Manifest

Fleet operators receive an ironclad 3-Year unlimited mileage warranty protecting against mechanical defect. The reinforced wooden freight crate holds the remanufactured 5-Speed RWD transmission, balanced lockup torque converter, replacement output seal hardware, and factory fluid filling procedure documents for certified mechanics.