Determine the cause of failure on the original clutch before installing the new one:
• Was the release bearing riding against the fingers of the pressure plate?
• Did the pressure plate warp? Is it hot spotted? Why?
• Was a mistake made on the previous installation?
• Is there a problem with the release mechanism?
Knowing the original cause of failure and correcting it will help avoid having the same problem with your new clutch install.
• Bellhousing alignment is critical to proper clutch operation. If you are using an aftermarket bellhousing, it must be dial indicated to the crankshaft center line and checked for squareness top-to-bottom and side-to-side. Check with your bellhousing manufacturer for specifics on performing this operation. Failure to do so could result in non-release or damage to your clutch system.
• The flywheel must be resurfaced or replaced before installing a new clutch assembly. In addition, run out should be checked on the flywheel once it is reinstalled to insure proper release of the clutch and minimal chatter on takeoff.
• On mechanical linkages, check the release fork and pivot ball, z-bar, and all bushings for excessive wear. Worn components should be replaced now to avoid problems later that could cause the clutch not to release properly.
• Check cable systems for stretch or fraying of the cable, or excessive wear in the pivot ball and fork. Many Ford applications require using an adjustable cable and quadrant for proper release of the clutch system.
• Check hydraulic systems for leakage, pinched lines, or overheated fluid. Fluid that appears brownish or black has been hot and should be flushed and replaced with new fluid.
• Applications that use headers or generate increased underhood temperatures should use heat resistant sleeving on all hydraulic lines.