what you need to look at is torlon. that is the common use in a lot of auto transmissions for check balls. if you have a rebuilder near by he might have some .
kommando said:You can google until you are blue in the face, not all compatibility charts cover Synthetic oils and those that do vary between the same as mineral or compatible A. As the order is on back order its academic, if they do not send them shortly I will go to nitride, no viton available either.