The clutch linkage should be adjusted when a new clutch is installed into a vehicle if it has been altered during the installation as a precaution. Along with this, most vehicles not utilizing a Concentric Slave Cylinder will need manual Pedal Adjustments performed. This will be done underneath the clutch pedal assembly containing a nut threaded on a rod to adjust the amount of throw to the release bearing. Ensuring this adjustment is correct will normally correct initial installation woes of improper release. This adjustment should be re-adjusted after the first 1,000 miles and every 10,000 miles thereafter. If you need more information regarding your particular drivetrain, many manufacturers include this information in their Factory Service Manual, or, you may reach out to our tech team for assistance.
- Check the clutch master cylinder and slave cylinder for any signs of leaking or failure.
- The hydraulics of the car may be faulty or have air in the lines, it is suggested to bleed the hydraulic system.
- The vehicle's clutch linkage cable could be stretched from overuse or the clutch quadrant is cracked or broken.
Hydraulics could have internal leaks as well which can cause improper operation. Check hydraulic lines for cracks or over-expansion. Due to the higher loads from performance plates, the O.E. rubber hydraulic hoses can expand causing an insufficient amount of fluid required to actuate the clutch.
- Ensure the clutch fork is not bent, cracked, or broken. The pivot ball could also be damaged (smashed) causing insufficient actuation.
- Improper or damaged release bearing
- The pressure plate has defective or damaged drive straps.
- The clutch disc or pressure plate assembly is bent or damaged.
- The clutch disc is getting caught on the input shaft. Check the input shaft for any burrs and ensure the disc can move smoothly on the splines before installation.
When installing, it is necessary to use the appropriate amount of grease on the input shaft. Too much grease can result in contamination of the friction surfaces and overheating of the assembly resulting in accelerated failure. Too little grease can result in corrosion or damage to the spline of the hub of the disc or the input shaft as a result of the friction from the two metal surfaces mating or binding.
- The clutch disc is installed improperly (backward) or was assembled improperly resulting in the disc contacting the flywheel bolts.
- The flywheel was not re-surfaced or has an incorrect flywheel step.
- The input shaft is bent causing clutch disc runout and damage to the spline of the hub of the disc.
- The guide pins of the transmission were are no longer being utilized and are now relying on only the bolts holding the bell housing to the engine. This may not necessarily cause issues immediately, but will likely cause movement over time causing shifting-related issues and/or clutch failure. Ensure that your drivetrain has these items or not, and ensure to continue use when removing and re-installing your bell housing/gearbox.
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