GM GENUINE PARTS Manual Transmission Clutch Pilot Bearing CT1082 (12557583) — OE Fit, Low-Friction Support

GM Genuine Parts CT1082 (12557583) is the original-equipment clutch pilot bearing that supports the transmission input shaft and ensures smooth clutch disengagement in compatible GM manual transmissions.

This pilot bearing is manufactured to General Motors' OE specifications and is the same design validated for use in GM vehicles. Installed at the center of the flywheel in the crankshaft flange, the bearing centers and supports the transmission input shaft while the clutch disc is disengaged, helping maintain alignment and reduce wear on transmission components. GM Genuine Parts are engineered, tested, and backed by General Motors to match factory fit, form, and function.

How does this pilot bearing improve clutch performance?

The pilot bearing provides a low-friction contact point for the transmission input shaft so the shaft can rotate independently of the flywheel when the clutch is disengaged. That separation prevents unwanted drag and reduces heat and wear on the clutch disc and transmission seals. Using a correctly specified OE bearing helps preserve the designed engagement feel and mechanical timing of the driveline.

• Supports the input shaft at flywheel center to maintain concentricity
• Reduces rotational drag during clutch release for smoother shifts
• Engineered to GM tolerances for consistent performance and longevity

What signs indicate the pilot bearing needs replacing?

Symptoms of a failing pilot bearing include grinding or rumbling while the clutch is disengaged, vibration through the shifter or bellhousing, and abnormal wear on clutch components after a clutch replacement. Diagnosing the bearing usually occurs during clutch service when the flywheel or clutch assembly is accessible. Replacing the pilot bearing at clutch jobs prevents premature wear on new clutch components.

• Grinding or unusual noise when clutch is pressed
• Shuddering or vibration when shifting gears
• Inspection reveals looseness or damaged rollers/bushing

How do I install the GM CT1082 pilot bearing correctly?

Installation is typically performed while the transmission and clutch are removed. The bearing must be pressed evenly into the flywheel bore using the correct driver to avoid damaging the outer race. Torque and clearance tolerances should follow the vehicle’s service manual to ensure proper alignment and avoid premature failure.

• Remove transmission and clutch to access flywheel center bore
• Press bearing squarely into bore with an appropriate installer tool
• Verify input shaft slides through bearing freely with correct clearance

What materials and standards back this GM Genuine Parts component?

GM Genuine Parts CT1082 is produced from high-grade materials and built to GM-recommended specs to match original factory components. The part undergoes engineering validation and testing to meet performance expectations for fit, form, and function. Choosing an OE-specified bearing helps ensure compatibility and long service life compared with generic replacements.

• High-quality steel and rolling elements for wear resistance
• Manufactured to GM OE specification for precise fit
• Backed by General Motors engineering and validation

Who is this for: The GM Genuine Parts CT1082 pilot bearing is intended for technicians, DIY mechanics, and GM vehicle owners performing clutch or transmission service on compatible models who want an OE-quality replacement. It’s especially appropriate when replacing the clutch, flywheel, or when addressing shaft alignment and noise issues—installing the correct GM part helps protect new clutch components and maintains factory performance.

• Features:
  • High quality materials ensure long service life
  • GM-recommended replacement part for your GM vehicle’s original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function