How do I check a 2 disc or 3 disc Ram clutch for wear?
The determining factor is the overall "stack height" of the clutch. To check this, install all of the parts into the clutch housing and set the cover on. Do not bolt it down. At this point, the cover should be sitting above the shoulder of the mounting studs. The distance between the top of the mounting stud and the bottom edge of the cover is the stack height. New clutches ship with a stack height around .110". The clutch will probably slip once this gap is reduced to around .050". If you use shim washers in the clutch on the studs, measure the gap with them in place first. If the stack is at or below .050", you can remove the shims which will restore the height back to .110". The next time it reaches .050" it will need rebuilt.