Its just casing marks from when the piece was made.
daman
New member
x2...mtnmaxman600 said:
I had one guy PM me saying to check it out closer with a magnifying glass because it could be belt slippage. But there is only this one major spot, and the backside/inside of it isn't cracked.
TJ500
Member
I'll give you $10 for that clutch 
..
as stated, casting marks.. tj
.. as stated, casting marks.. tj