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U151F Automatic Transmission Planetary Gear Assembly 3572028070
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Function: Torque multiplication unit for Toyota/Lexus 8-speed transmissions (e.g., Aisin AWF8G30), enabling gear ratio changes via selective clutch engagement.
Key Components:
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Lepelletier Design: 1 Ravigneaux + 1 simple planetary set for compact 8-speed ratios
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Hardened Gears: Case-hardened steel (HRC 60+) with ground tooth profiles
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Needle Bearings: Low-friction support for planetary pinions
Failure Modes:
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Sun Gear Spline Wear: Causes 3-5-7 gear slippage (P2714 codes)
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Pinion Bearing Failure: Results in gear whine (check endplay <0.15mm)
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Carrier Cracks: Fatigue near thrust washers (metal debris in pan)
Critical Specs:
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Sun gear axial play: 0.10-0.25mm
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Pinion gear backlash: 0.05-0.12mm
Pro Tip: Always replace planetary thrust washers during rebuilds – worn washers alter gear alignment.
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U151F Automatic Transmission Assembly
,3572028070 Automatic Transmission Assembly
Mrs. Kinny
Foreign trade Manager
- Email: admin@transmesun.com
- Tel: +8618665691829
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+8618665691829
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