Marathon 577 was the oil i used. It eat the glue right out from under the plates the fiber disk peeled like the skin on an onion.
The C4 plate fiber disk was very close to like new thickness when they failed.
In the end I split that tractor 4 times before i got everything fixed. Every disk except the TLC failed.
The only reason the TLC didnt fail was because the guy that owned the tractor before me put a NEW case rebuilt engine and a new TLC at the same time