30500-48320 Toyota Highlander 3.5L U151F Transmission

The automatic transmission assembly with reference numbers 30500-48320, 30500-48340, and 30500-0E041 is designed for the Toyota Aisin U151F 5-speed AWD automatic transaxle. This unit features ECT-i electronic shift control and a heavy-duty lock-up torque converter, delivering smooth shifting and reliable V6 torque capacity for Toyota Highlander, RAV4, and related AWD platforms.

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Quick Specifications:
• Part Numbers: 30500-48320 / 30500-48340 / 30500-0E041 / 30500-42200
• Transmission Model: U151F (5-Speed Automatic AWD)
• Configuration: Transverse All-Wheel Drive (AWD / 4WD) compatible
• Engine Compatibility: 3.3L 3MZ-FE & 3.5L 2GR-FE V6
• Fluid Type: Toyota ATF Type T-IV or Toyota ATF WS (verify by vehicle year/dipstick)

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Applications:
• Toyota Highlander AWD (2004-2013, 3.3L 3MZ-FE & 3.5L 2GR-FE V6 variants)
• Toyota RAV4 AWD (2006-2012, 3.5L 2GR-FE V6 variants)
• Toyota Sienna AWD (2004-2010, 3.3L & 3.5L V6 variants)
• Lexus RX330 / RX350 AWD (2004-2009, 3.3L & 3.5L V6 variants)

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Complete Assembly Includes:
✅ Transmission case with heavy-duty 5-speed planetary gear train
✅ Torque converter with lock-up clutch
✅ Valve body with linear shift solenoids
✅ Oil pump, internal filter, and multi-disc clutch packs
✅ Speed sensors and sealing gaskets

Note: Mounts, shift cables, external cooler lines, transfer case assembly (if separate), and wiring adapters may need to be transferred or purchased separately.

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Key Features:
✅ 5-speed ECT-i architecture for optimized V6 acceleration and highway cruising
✅ Reinforced planetary gearsets and clutch packs built for SUV AWD torque loads
✅ Lock-up torque converter reduces slippage and improves fuel efficiency
✅ Precision-calibrated valve body ensures smooth upshifts and responsive kickdowns
✅ Proven high-mileage durability for Toyota and Lexus V6 crossover platforms

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Technical Notes:

Installation Criticals:
• Fluid Fill: Check the vehicle's factory specification (Toyota ATF T-IV for early 3.3L models or ATF WS for 2007+ 3.5L models) and set level at proper operating temperature.
• TCM Programming: ECM/TCM memory reset (AT Code Registration) must be performed after installation using Toyota Techstream so the module relearns shift pressures.
• Torque Converter: Ensure full seating ("three clicks") into the front oil pump before mating to the engine to prevent pump damage.
• Cooler Flushing: Flush the radiator cooler, external auxiliary cooler, and lines thoroughly to remove debris from the old unit.

Maintenance Tips:
• Use only genuine Toyota ATF T-IV or ATF WS fluid as specified for your model year.
• Perform ECM/TCM adaptation reset via OBD2 scanner after installation.
• Monitor transmission temperature during towing or heavy loads to prevent overheating.