Well first how comfortable are you doing mechanical type work? Do you have the tools? If no find somebody that is/does. If yes them drail the oil, pull the cover and look for any pieces that are broken or loose. If nothing is obviously wrong then I would suggest pulling the clutch assembly apart and looking at the plates and fingers on the basket. You will also need to measure the spring height since you have them out to check if they are within spec. then report back.