6HP26 2009-2010 BMW 750i / 750Li 4.4L RWD – Remanufactured 6-Speed Automatic Trans

Description

Meet strict executive transport fleet uptime standards with 188 lbs of dyno-tested transmission architecture that manages 400 horsepower across 6 computer-controlled forward gear speeds in the BMW 750 6HP26 Remanufactured Transmission configured for 2009 to 2010 BMW 750i and 750Li 4.4-liter twin-turbocharged sedans. This unit eliminates mechatronic pressure drops, stops converter shudder, and maintains sharp gear shifts under load.

The casing utilizes high-density die-cast aluminum to isolate internal gear sets from drivetrain flex during hard vehicle acceleration. Sonnax valve sleeves restore worn hydraulic bores in the mechatronic valve body to stop cross-channel fluid leakage. Driveline hardware includes 3/8-inch inverted flare cooler connections, an 11.25-inch torque converter bolt circle, and an unladen dry weight of 188 lbs. Total transmission fluid capacity holds 10.0 quarts of high-grade synthetic automatic transmission fluid.

Key Features of BMW 750 6HP26

Fleet operations managers buy BMW 750 6HP26 remanufactured transmission units to eliminate vehicle downtime during critical corporate travel services. Each replacement gear train undergoes loaded dynamometer verification to confirm hydraulic valve actuation under simulated road resistance.

• 265 PSI main line pressure calibration maintains firm clutch pack clamp force across all forward gears under twin-turbo torque.
• 6 computer-controlled forward gear speeds optimize engine torque output from low idle speeds up to highway cruising.
• 7 carbon-metallic friction plates per pack prevent clutch slippage under severe thermal stress.
• 0.0015-inch gear tooth runout tolerances on planetary gear sets minimize gear whine and driveline vibration.
• 188 lbs bare casing weight fits original equipment transmission tunnel mounts without chassis alteration.
• Pulse-width modulated shift solenoids respond within 38 milliseconds to execute instant electronic gear changes.
• Balanced remanufactured torque converter eliminates rotational vibration across all operating engine speeds.

Twin-Turbo Torque Transmission Parameters

Operating line pressures range from 230 to 295 PSI to lock internal clutch frictions without hesitation. The internal gear set provides a 4.17:1 first gear ratio for initial launch, stepping down through intermediate gears to a 0.69:1 overdrive ratio. Continuous input torque capacity peaks at 450 lb-ft at 3,600 RPM under severe commercial fleet duty cycles. Auxiliary cooler circuits disperse 490 BTU per minute of heat energy to hold operating sump temperature between 160°F and 190°F.

Twin-Turbo Companion Flange Alignment

The transmission output shaft connects to the driveline through a 3-bolt companion flange engineered for rubber flex discs. Output flange dial indicator runout measures less than 0.0012 inches total indicator reading to stop center bearing vibration. An internal mechanical parking pawl mechanism holds up to 1,400 lb-ft of static driveline reverse torque on steep ramps.

Twin-Turbo Mechatronic Maintenance Protocol

Technicians must execute transmission control module electronic adaptation drive cycles after installation to calibrate pulse-width modulated solenoids to factory shift timings. Magnetic fluid pan inspection maintains long-term transmission fluid purity during high-mileage fleet operations. This remanufactured drivetrain is not engineered for track drag racing, extreme rock crawling, or gross combined vehicle weights exceeding factory chassis tow limits.

• Verify transmission fluid level through the side inspection port each shift during initial fleet break-in.
• Flush auxiliary oil cooler lines and replace pan filter media every 30,000 miles of operation.
• Inspect cooler port fittings and external rubber mounting bushings every 12 months for physical wear.

Twin-Turbo Sedan Warranty Manifest

Each unit includes a 3-Year / 100,000-Mile commercial fleet warranty covering internal mechanical components against defect. The heavy-duty crated package contains one remanufactured transmission unit, a precision balanced torque converter, replacement cooler line seal washers, an installation instruction guide, and a signed dynamometer inspection sheet.