The sintered plates were bullet proof.
When i had a failure on the C4 clutch i wanted to put those in my 1370 but couldnt find any new ones so I went with the paper fider stuff from case/ih.
I did however find sintered brake disks and sintered plates for the differential.
I was told that when case originally made the 70 series they came out with the sintered plates even for the PTO.
The things wouldnt hardly wear and you could use any oil against them. They could even take water!
For some reason case changed to the paper fiber plate and had what can only be described as a glue problem.
i wish someone would make the sintered plates again.