AC60F C1 Clutch Input Shaft Forward Gear Clutch Assembly Includes Clutch Disc
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Function: Transmits torque in forward gears (1st-4th) via multi-plate clutch engagement in Nissan/Infiniti transverse 6-speeds.
Key Components:
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Splined Input Shaft: Hardened steel with micro-polished bearing surfaces.
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Clutch Drum: Laser-welded aluminum with reinforced piston lugs (OEM 31706-JK00B).
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Piston Assembly: Dual-lipped seals for high-pressure stability (60-80 psi apply).
Failure Modes:
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Spline Wear: Causes clutch drag (delayed 1-2 shifts, P17F5 codes).
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Seal Extrusion: Contaminated ATF (NS-3) degrades seals → pressure loss.
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Drum Cracks: Thermal stress near weld seams (sudden no-drive condition).
Critical Checks:
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Shaft endplay (<0.2mm).
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Drum runout (<0.08mm).
Pro Tip: Replace both C1 clutch and torque converter if metal debris is present – debris migrates to TC lockup clutch.
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C1 clutch input shaft forward gear
,AC60F Clutch Disc
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