Irideo1,

when I refer to under load I’m meaning that any pushing on the pedal more than a gentle push is all it takes to cause the problem.
I did spend time looking to see if I had a crack in my frame and was not able to see anything of concern.

Today I decided to isolate my problem and remove the front derailleur. Without the front the derailleur the problem remains present. The front bottom two chain rings work well but when I put the chain on the top chain ring and begin to pedal the chain makes lots of noise and drops down to the middle chain ring. I’m happy I was able to isolate the problem but I’m still left without a remedy. The large chain ring is a 46 tooth. Is my solution simply finding a suitable replacement for that ring?

Thank you.