AX4N 1999 Ford Taurus 3.4L FWD – Remanufactured 4-Speed Automatic Trans

Description

Sustaining 230 lb-ft of torque near 6,800 RPM redlines requires reinforced drive sprockets and 230 PSI circuit pressures to prevent high-speed ratio slippage. Built for the final-year 1999 Ford Taurus SHO 3.4-liter V8 platform, this Ford Taurus AX4N Remanufactured Transmission maintains firm clutch clamping. Upgraded forward clutch cylinders stop drum fatigue during aggressive high-speed expressway acceleration.

Die-cast A380 aluminum casing structures protect dual planetary gear sets, hardened sprockets, and high-tensile link chains. Hard-anodized Sonnax valve sleeves eliminate fluid bypass past micro-polished separator plates. Outfitted with 3/8-inch inverted flare cooler ports, this 208-pound unit holds 12.2 quarts of Mercon V fluid and mounts straight to front subframe points without sheet metal alteration.

Key Features of Ford Taurus AX4N

Performance fleet buyers seeking to buy Ford Taurus AX4N automatic transmission packages receive dyno-certified drivetrain units engineered to withstand high-rpm V8 stresses. Upgraded valve bodies and furnace-brazed converters deliver long-term reliability in severe service.

• High-energy carbon-composite friction discs survive elevated rotational velocities without lining separation
• Sonnax hard-anodized pressure regulator sleeves maintain constant hydraulic line pressure during redline shifts
• High-rpm shift solenoids trigger ratio changes within 40 milliseconds to protect clutch packs
• Computer-balanced torque converters receive furnace-brazed impeller fins to prevent centrifugal distortion
• Case-hardened steel drive sprockets transfer 235 horsepower without chain jump or pitch wear
• Micro-finished steel separator plates maintain flat hydraulic sealing under high thermal expansion
• Remanufactured AX4N high-output valve bodies pass stringent multi-stage vacuum integrity testing
• Heavy-duty fluoroelastomer input seals prevent transmission fluid leakage around high-speed pump shafts

Hydraulic Operating Pressure Range

Operating fluid pressure modulates between 65 PSI base pressure and 230 PSI at wide-open throttle. Continuous input torque capacity reaches 230 lb-ft at 4,800 RPM in severe commercial interceptor service. Forward reduction ratios provide 2.77:1 first, 1.54:1 second, 1.00:1 third direct, and 0.69:1 fourth overdrive. Auxiliary transmission coolers shed up to 21 kW of thermal energy, keeping fluid sump temperatures between 165°F and 188°F.

Front Differential Spline Interface

Differential side gears receive 28-spline front-wheel-drive CV half-shafts to transfer torque straight to drive wheels. The heavy-duty internal park pawl holds 1,500 lb-ft of static driveline load on steep inclines. Output shaft runout verifies below 0.0013 inches dial indicator deflection, eliminating front-end chassis vibration.

Electronic Adaptation Drive Protocol

Run a computerized PCM adaptive relearn procedure after transmission installation to calibrate clutch engagement pressures across all forward gears. This transmission unit is not engineered for nitrous-boosted competition, track drag racing, or payloads exceeding factory gross vehicle weight limits.

• Inspect fluid level and clean metallic debris from the pan magnet every 30,000 miles
• Evacuate and refill the transmission fluid sump using certified synthetic fluid every 12 months
• Flush external transmission cooler lines and clear radiator fins every 24 months

Standard Warranty Crate Contents

Every unit includes a 3-Year / 100,000-Mile commercial fleet warranty for lasting vehicle protection. The protective shipping container carries the fully remanufactured transmission unit, balanced torque converter, replacement cooler line washers, installation instructional sheet, and signed dynamometer test results.