6HP19 2005-2008 Audi A6 Quattro 3.2L AWD/4WD – Remanufactured 6-Speed Automatic Trans

Description

Fabricated for commercial launch fleets, ZF 6HP19 Fleet Marine Gearbox remanufactured packages serve 2005-2008 Audi A6 Quattro 3.2L all-wheel marine installations. This 6-speed automatic drivetrain channels 255 horsepower at a 6500 RPM input ceiling. Microprocessor-directed valves control ratio shifts with a 4.17:1 first gear reduction ratio for controlled thrust during close harbor maneuvering.

Structural spheroidal graphite iron casting walls give the outer case rigidity against driveline twist in chop. Ground AGMA Class 11 helical teeth maintain full gear contact to prevent tooth face pitting under torque loads. Sintered bronze clutch plates with spiral oil grooves minimize thermal spikes inside forward packs. A cupronickel tube bundle heat exchanger with sacrificial zinc anode plumbs to 1.25-inch raw water lines. Hydraulic control ports feature 7/16-20 JIC flare threads. Dry weight totals 218 lbs holding 9.5 quarts fluid capacity in an SAE #3 configuration.

Key Features of ZF 6HP19

Harbor operators elect to buy ZF 6HP19 marine gearbox packages to repower patrol craft and inland workboats requiring automatic gear shifting. This remanufactured drivetrain integrates with electronic controls to optimize propeller rotation across variable hull speeds.

• 285 PSI clutch application pressure prevents slip under continuous high throttle operation
• 6 forward gear ratios step down from 4.17:1 low gear to 0.69:1 overdrive for efficient cruising
• 2.6 gallon per minute internal pumps circulate oil through heat exchanger cooling tubes
• 12-volt electronic shift solenoids command gear transitions within 75 milliseconds for uninterrupted thrust
• 4.17:1 planetary gear sets handle extreme starting torque to turn heavy pitch wheels
• 260 lb-ft torsional damper plates isolate engine vibration from this 6HP19 marine gearbox
• 6 bolt companion flanges transfer rotational torque straight to the propeller shaft coupler

Continuous Duty Torque Multipliers

Working hydraulic fluid pressures stay within 215 to 285 PSI pump pressure to maintain clutch lockup under sudden torque demands. Transmission sump operating temperature remains bounded between 150°F to 185°F operating sump temperature throughout continuous commercial service. Peak continuous input torque attains 245 lb-ft at 4500 RPM under a medium duty rating. The cupronickel heat exchanger yields a thermal heat rejection rate of 610 BTU/min into circulating raw seawater. A 4.17:1 first gear mechanical reduction ratio directs deep torque to the wheel to lift heavy displacement craft onto plane.

Coupler Flange Fitment Standards

The companion flange incorporates a 5.0-inch outer diameter and a 4.25-inch pitch circle diameter drilled for 6 high-strength fasteners. Internal tapered roller bearings absorb 2,200 pounds of continuous propeller thrust force. Flange vertical drop geometry spans 180 mm center distance. Dial indicator alignment runout to the stern tube shaft must not exceed 0.003 inches.

Shift Solenoid Maintenance Protocol

Solid-state electronic solenoids regulate clutch actuation without mechanical cables, while an accessible dipstick enables quick fluid inspections before departure. This transmission is not engineered for deep-sea purse seiners or harbor push tugs. Following established fluid inspection routines prevents transmission clutch burn.

• Check fluid color and test oil level at the dipstick each shift prior to engine ignition
• Drain transmission fluid and clean metal debris from the suction screen every 250 hours of operation
• Replace sacrificial zinc anodes inside the raw water cooler bundle every 12 months during vessel haulout

Verified Warranty Container Breakdown

Each remanufactured package includes a 2-Year commercial limited warranty defending all internal geartrains against defects. The reinforced wooden shipping crate contains 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.