Originally Posted by CMcAllister
YES!

Even if it still seems fine to drive.



In 2017 I broke a ring & pinion at a test & tune before an important double header weekend. Spent Day 1 putting in a new gear and won on Day 2! First pass at a T&T at the next event I went to, the 904 sprag "finished breaking"!

OP did say that it happened on the 1-2 shift. I don't know if that would make any difference, but I wouldn't risk it. .