New UA80F 8-Speed AWD Automatic Transmission Assembly OE 3050045080 for Toyota Sienna 3.5L 4WD Gearbox Replacement Parts

This brand-new UA80F 8-speed all-wheel-drive automatic transmission assembly matches Toyota Sienna 3.5L AWD model, corresponding OE numbers 3050045080 and 3050045081.

Each complete gearbox is strictly inspected before delivery and runs through full dynamic bench testing to verify shifting smoothness, hydraulic pressure stability, oil tightness and noise performance.

It resolves typical failures including gear shift hesitation, slipping, abnormal internal noise, transmission oil leakage and frequent fault codes caused by aging original gearboxes. Direct plug-and-play replacement, greatly shortening overhaul cycle for professional repair workshops.

1. Appearance inspection: Check housing for casting defects, deformation and surface damage.
2. Internal component inspection: Verify gears, synchronizers, bearings and sealing components meet OEM dimensional standards.
3. Assembly strictly follows OEM torque specifications, ensuring accurate preload for all moving parts.
4. Oil leakage pressure test to eliminate hidden leakage risks.
5. Dynamic bench load simulation: Test all forward & reverse gears, lock-up function, working pressure and operating noise.

• Rigorous Pre-shipment Bench Dynamic Testing

Each unit completes full load testing to eliminate hidden defects and reduce after-installation complaint risks.

• Exact OEM Dimension

Fully consistent with original mounting hole positions, spline size and wiring layout, no modification required during installation.

• Complete Supporting Parts Supply

We supply matching UA80F overhaul kits, solenoid valves, torque converters and ATF oil, supporting mixed consolidated orders.

• Flexible Wholesale Policy

1 piece minimum trial order. Tiered discount for bulk orders. Neutral unbranded wooden case packaging available. Negotiable warranty terms for long-term overseas wholesale partners.

1. Inspect transmission mounting brackets, wiring harness and cooling pipelines of Toyota Sienna before installation.
2. Install the whole gearbox assembly, tighten all bolts strictly according to OEM torque standard.
3. Fill with specified Toyota WS automatic transmission fluid; unsuitable oil will accelerate internal component wear.
4. Complete adaptive learning with professional diagnostic equipment after installation.
5. Carry out comprehensive road test to confirm smooth shifting, no abnormal noise, no oil leakage and no fault codes.

Our factory focuses on brand-new and remanufactured automatic transmission assemblies and full-range transmission spare parts for Japanese and American vehicles.

We own complete assembly workshop and professional transmission bench test equipment. We supply Toyota series transmission assemblies and spare parts to overseas transmission repair centers and auto parts wholesalers across Southeast Asia, Middle East, North America and Australia. Stable stock for mainstream JDM gearbox models, fast delivery and professional English technical after-sales support team.