AWTF60SN Transmission 4-5-6 K2 Clutch Drum 4 Clutches 15 Spline Shaft Drum Clutch Assembly
The drum clutch assembly is a core torque transfer unit in modern automatics (especially planetary-based designs). Key points:
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Function – Houses stacked friction/steel plates activated hydraulically to lock planetary gearset elements.
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Critical Parts – Drum body, apply piston, seals, return springs, and splined hubs (input/output connections).
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Failure Modes
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Drum cracks: Stress fatigue near weld seams or splines.
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Seal leaks: Causes slow engagement (delayed shifts).
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Plate wear: Glazing/burnt material leads to slippage (P0776 codes).
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Inspection – Check drum for scoring/ovalization; measure plate clearance (exceeding 1.5mm requires pack replacement).



4-5-6 K2 Clutch Drum
,15 Spline Shaft K2 Clutch Drum
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