6HP19 2006-2007 BMW 325xi & 525xi 3.0L AWD/4WD – Remanufactured 6-Speed Automatic Trans

Description

Channel 215 horsepower and 185 lb-ft input torque through 6 forward gear ratios under 230 PSI circuit pressures to conquer demanding regional courier delivery routes with the BMW 6HP19 Remanufactured Transmission built for 2006 to 2007 325xi and 525xi 3.0-liter all-wheel-drive platforms. This unit restores crisp clutch engagement across highway transit and commercial logistics applications without slip.

Cast from high-density aluminum alloy, the casing preserves structural rigidity against chassis twisting forces under load. Hard-anodized Sonnax valve bore sleeves halt internal fluid bypass while micro-polished steel separator plates stabilize shift pressure. Driveline integration features 3/8-inch inverted flare cooler line ports, a 9.25-inch torque converter bolt circle, and a total dry weight of 158 lbs. Fluid capacity holds 9.5 quarts of low-viscosity synthetic automatic transmission fluid.

Key Features of BMW 6HP19

Fleet managers buy BMW 6HP19 remanufactured transmission units to eliminate vehicle downtime during critical regional transport operations. Each replacement gear train undergoes dyno verification to confirm hydraulic valve actuation under simulated road loads.

• 235 PSI main line pressure calibration maintains firm clutch pack clamp force across all forward gears under heavy commercial vehicle acceleration.
• 6 forward gear ratios optimize engine torque output from low idle speeds up to highway cruising.
• 5 carbon-metallic clutch plates per friction pack prevent clutch slippage under severe thermal stress.
• 0.002-inch gear tooth runout tolerances on planetary gearsets minimize gear whine and driveline vibration.
• 158 lbs bare casing weight fits original equipment transmission tunnel mounts without chassis alteration.
• Pulse-width modulated solenoids respond within 40 milliseconds to execute instant electronic gear changes.
• Balanced remanufactured torque converter eliminates vibration across all operating engine speeds.

Dynamic Torque Transmission Parameters

Operating line pressures range from 215 to 280 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 295 lb-ft at 4,000 RPM under severe commercial fleet duty cycles. Auxiliary cooler circuits disperse 420 BTU per minute of heat energy to hold operating sump temperature between 160°F and 190°F.

Driveline Interface Spline Specifications

The rear output shaft features 24 precision-machined splines configured to mate with all-wheel-drive transfer case input shafts. Output flange dial indicator runout measures less than 0.0015 inches total indicator reading to stop center bearing vibration. An internal mechanical parking pawl mechanism holds up to 1,200 lb-ft of static driveline reverse torque on steep parking ramps.

Shift Adaptation 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 quick-disconnect fittings and external rubber mounting bushings every 12 months for wear.

Fleet Warranty Crate Manifest

Each unit includes a 3-Year / 100,000-Mile commercial 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.