well, that noise I was trying to explain above is actually not going away. Maybe I imagined that it did, I don't know. I have a noise and slight vibration when I'm at partial clutch. Full clutch and it goes away. It sounds sort of like the sound when they are making you a duplicate key, but not so high pitched. A periodic scraping sound. My only guess is that the clutch fingers are not all contacting at the same time? Or maybe its normal... I have no top plus numerous gaping holes into the engine compartment. I hear everything. What do you guys think?
There are two types of clutch throwout bearing collars used in these vehicles.
One of the collars has a roll pin inserted in it's periphery to prevent collar/inner bearing race rotation when the crankshaft is in motion.
The other type has no roll pin or any other method used to stop the entire bearing assembly from rotating continuously.
The "stopped" collar unit is quiet in operation, but it also wears tremendously at the two points where the fork contact points engage it in the slot. Over time, the wear of the fork tips and the two wear points in the collar groove, add up to the incorrect clutch throwout travel which is the root cause of all these issues!
The collar with no positive stop is noisey, but it also does not exhibit the two distinct wear points thus it's "better" over the long term, resulting in only the two points on the throwout fork wearing down over time like yours did (and everyone else's!!).
I "repair" the throwout collars with the stop pin by moving it to a new position. Eliminating the pin will not work on those due to the extreme wear points impressed into the groove, we can only "relocate" the wear points to an area where they are inconsequential when used with a remanufactured throwout fork. The only other choice is having new collars machined which we May have to do in the future, but those items would be very pricey.
The slight pedal pulsation you feel when "riding" the clutch is perfectly normal with any manual clutch. No doubt the pressure plate could stand to be rebuilt/adjusted, but it's sure not worth it to do so until it fails in my book. Don't obsess over stuff like that, these vehicles are one step removed from an IH manure spreader, they are not "finely crafted" examples of motor vehicle engineering!!
now back to dialing in the engine.
