...I would like to add...I have probably Replaced near a Dozen Clutches in my 68 Years on this Planet, for My cars and those of Others. I learned or was Taught a few tips. Clutch Components must be handled Delicately. The Disc Friction Material is Sensitive to Contamination. I have made a 'Study' of 'Slipping Clutches'. Most of them, Mine.
1. Never touch the 'DISC' with the Fingers! You pick the Disc up by poking a finger through the Splined Hub, or grasping the Hub, itself. As Little as a 'Greasy' Finger print, WILL cause the Disc to Wear-In UNevenly, this, in time results in a Clutch that Shudders upon Engagement (Releasing the Clutch Pedal).
2. The 'Friction Contact Surface' of the Flywheel And the Pressure Plate MUST be Cleaned of All Manufacturing Oil using Alcohol. DO NOTHING to the DISC, Don't Touch It !!
3. Do NOT Pack the Pilot Bearing Or Bearing Pocket with any Kind of grease. This was explained previously.
4. A Tool That Aligns the Splines of the Disc to the Pilot Bearing, when Installing the Pressure Plate, Over it...Is NOT Needed. Just Install the Plate over disc, Snug the Bolts Up. loose enough, and position both hands, Thumb and fingers to 4 Points Around the Circumference of the DISC and Adjust it For 'Equal-Distance' around the Circumference of the Pressure Plate....Tighten, then Torque the 6 Bolts. You may use NO locktite or BLUE Locktite on the Bolt Threads. Never RED Locktite, you would need to use the Heat of a torch to Loosen RED.
5. The NEW Clutch Assembly, more likely, was NOT Balanced with ALL of the 'Rotating Assembly', Expect a Vibration to Result! This Vibration Will be Viewed in the 'Rearview Mirror'. IF the Clutch Pressure Plate WAS balanced with the Flywheel, the Technician would have Stamped a 'Witness Mark', usually a 'A' on both the Flywheel and P. Plate, be sure these are Aligned.
MJ