U151F 2007-2010 Toyota Sienna & 2007-2009 Lexus RX350 3.5L AWD/4WD – Remanufactured Automatic Trans

Description

Across grueling 14-hour urban logistics shifts demanding 200 stop-and-go curb drops, internal friction plates hold 225 PSI clamp pressure without slip inside the Toyota U151F Remanufactured Transmission engineered for 2007 to 2010 Sienna and 2007 to 2009 Lexus RX350 3.5-liter all wheel drive commercial fleet vehicles.

Thick-wall aluminum transaxle cases combine housing stiffness with rapid heat dissipation into underbody air streams. Hardened steel planetary gear sets pair with carbon-metallic friction discs featuring radial cooling grooves to withstand high-load highway acceleration. Hardware specs detail a furnace-brazed torque converter, 3/8-inch cooler fittings, 9.8-quart fluid sump capacity, and an overall dry unit weight of 198 lbs.

Key Features of Toyota U151F

Airport limousine fleets buy Toyota U151F remanufactured transmission packages to lower operational fleet repair costs and maintain exceptional vehicle reliability. Rebuilt internal hydraulic valves ensure clean gear transitions through congested terminal traffic grids.

• Sonnax valve body bore sleeves halt hydraulic fluid bypass to preserve clutch clamp pressure
• Carbon-metallic friction plates resist heat buildup during long highway climbs
• Furnace-brazed torque converter impellers prevent vane flex under high stall loads
• Pulse-width modulated shift solenoids execute gear changes without driveline hesitation
• Toyota U151F transaxle packages pass strict dial indicator runout and dyno load checks
• Nitrided planetary sun gear teeth prevent surface spalling under continuous vehicle operation
• Bottom-access steel fluid pans with magnetic drain plugs permit easy oil inspection

High Output Fluid Pressure Limits

Engineered for commercial passenger transport, this five-speed automatic transaxle channels 251 lb-ft continuous input torque at 4,700 RPM under 170 to 225 PSI main line hydraulic pressure. Sump temperature runs between 160°F and 185°F under full-load routes. Forward ratios feature 3.938:1 first, 2.194:1 second, 1.411:1 third, 1.020:1 fourth, and 0.703:1 fifth overdrive, dissipating 56 BTU per minute through the cooling system.

Rear Transfer Pinion Output Fitment

Rotational torque outputs through internal transfer drive splines designed to drive factory center transfer cases. Total dial indicator runout across output sockets holds under 0.0017 inches to stop driveline shudder. High-grade viton axle seals protect internal fluids from road water and grime.

All Wheel Drive Automatic Maintenance

Check the transmission fluid level via the dipstick tube to ensure proper fluid volume before route dispatch. This automatic transaxle is not engineered for heavy utility equipment hauling, off-road trials, or vehicle conversions exceeding manufacturer gross ratings.

• Check transmission dipstick fluid level and clarity each shift
• Flush transaxle fluid and replace pan filter every 30,000 miles
• Inspect engine and transmission rubber mounts every 12 months

Commercial Drivetrain Protection Package Contents

Covered by an outstanding 3-Year / 100,000-Mile commercial fleet warranty, this unit provides dependable long-term service. Shipment contains a fully remanufactured automatic transaxle, balanced torque converter, transfer case gasket set, and a certified dyno test report.