I bought some chain lube with moly yesterday fro a local auto part store. I soaked the shaft and sprayed some in the housing. Re-installed the flex shaft and let it set over night. Today when I use my machine and it worked great!
It was hardly warm and today's outside temp was in the 70's and warmer in my shop. I didn't find any Gunk brand but it said with moly on the can.
For those who are have Napa auto part stores, don't waste your money on the the spray lube they have. I was told it didn't have moly but it is a dry lube and works well. Not for the flex shaft, it dried like graphite. So don't waste your money.
I am sure you can find a chain lube with moly at a auto part store. Spray it on thick and let it sit over night. It works! I wish it would fix the check cut motor issue!
Rick