Brand Name:
Toyota
Model Number:
U760E;U760F;U761E;U761F
Function: Engages specific gear ratios (often overdrive/reverse) by locking planetary gearset elements via hydraulic pressure.
Key Components:
Clutch Drum: Hardened aluminum with precision splines (OEM-specific coating)
Friction Plates: Carbon-fiber or paper-based with grooved design for cooling
Steel Plates: Laser-cut with anti-stick coatings
Piston Assembly: High-temp seals (Vitron/HNBR) for 100+ psi apply pressure
Failure Modes:
Plate Glazing: Overheating causes slippage (P0776 codes)
Seal Leaks: Worn piston seals lead to delayed engagement
Drum Warpage: Distorts under load (>0.1mm runout = replace)
Critical Specs:
Pack clearance: 0.5-1.2mm (varies by model)
Apply time: <0.5 sec (measured with scan tool)
Pro Tip: Soak new friction plates in ATF for 30 mins – dry plates absorb fluid during initial engagement, causing shift flare.
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