6F50 2010 Ford Taurus, Lincoln MKS 3.5L AWD/4WD – Remanufactured 6-Speed Automatic Trans

Description

Specified for dual-propeller workboats, Ford 6F50 MKS Marine Transmission remanufactured packages serve 2010 Ford Taurus and Lincoln MKS 3.5L all-wheel marine conversions. This 6-speed automatic drivetrain channels 315 horsepower at a 6500 RPM input ceiling. An electro-hydraulic valve module manages gear transitions with a 4.48:1 first gear reduction ratio for controlled thrust during close-quarters maneuvers.

High-strength spheroidal graphite iron casting walls protect internal geartrains against case flexing under severe hydrodynamic loads. Precision AGMA Class 11 helical teeth undergo crown shaving to minimize operational gear noise. Multi-disc sintered bronze friction plates feature radial fluid grooves to evacuate clutch heat. A cupronickel tube bundle heat exchanger with sacrificial zinc anode plumbs to 1.25-inch raw water lines. Control ports accept 7/16-20 JIC flare fittings. Dry weight totals 230 lbs with 10.5 quarts capacity in an SAE #3 bell housing.

Key Features of Ford 6F50

Commercial vessel captains choose to buy Ford 6F50 marine transmission units to power harbor launches and high-speed pilot vessels. This remanufactured drivetrain integrates electronic ratio selection to optimize engine power across both displacement and high-speed planing speeds.

• 285 PSI line pressure circuits secure clutch pack lockup during sudden throttle advances
• 6 forward gear ratios step down from 4.48:1 to 0.74:1 to match engine torque to propeller resistance
• 2.6 gallon per minute internal pumps circulate fluid through cooler circuits to suppress thermal spikes
• 12-volt pulse-width solenoids execute gear shifts within 80 milliseconds for smooth acceleration without surge
• 4.48:1 reduction planetary gears deliver high low-end torque for rapid harbor maneuvering
• 275 lb-ft torsional damper plates absorb engine vibration ahead of this 6F50 transmission unit
• 6 bolt companion flanges transfer shaft rotation straight to inboard shaft couplings

Torque Output Hydraulic Controls

Working clutch fluid pressures operate within 215 to 285 PSI pump pressure to maintain clutch pack engagement across all throttle positions. Transmission sump fluid heat stays within 150°F to 185°F operating sump temperature throughout continuous runs. Peak continuous input torque measures 280 lb-ft at 4500 RPM under a medium duty rating. The cupronickel heat exchanger provides a thermal heat rejection rate of 625 BTU/min into raw water circuits. A 4.48:1 first gear mechanical reduction ratio directs high torque to propeller shafts for rapid hull planing.

Shaft Flange Alignment Standards

The companion flange features a 5.0-inch outer diameter and a 4.25-inch pitch circle diameter drilled for 6 hardened bolts. Internal heavy-duty roller bearings absorb up to 2,250 pounds of continuous propeller thrust force. Flange vertical drop geometry measures 180 mm center distance. Dial indicator alignment runout to the stern tube shaft must remain below 0.003 inches.

Gearbox Service Maintenance Timeline

Solid-state electronic solenoids govern gear ratios without mechanical push-pull cables, while an upper dipstick port permits quick fluid checks in tight engine compartments. This transmission is not engineered for deep-sea ocean trawlers or continuous commercial harbor push tugs. Routine maintenance protects internal clutch packs.

• Examine fluid clarity and check oil level at the dipstick each shift prior to engine start
• Drain transmission fluid and inspect the magnetic suction screen every 250 hours of operation
• Renew sacrificial zinc anodes inside the water cooler bundle every 12 months during vessel haulout

Coverage Terms Crate Manifest

Each unit ships with a 2-Year commercial limited warranty defending all internal components against defects. The heavy wood crate holds one bare marine transmission unit, an input torsional flex plate, a seawater oil cooler bundle with mounting bracket, an output companion flange, an oil dipstick, and a factory workshop manual.