@Jm posted:To Rod: These locos do not have speed control, and that is not really a "fix" now is it.. Turning off something like speed control just covers up the problem.
jm; you can call it whatever you want; I am just using the exact terminology used in the owners manual (from 2000) excerpt that I attached. I recall that once you deactivate speed control per the manual, the engine behaves normally in conventional. In recent years I have been 100% command, so what do I know. Your OP referred to them as "early TMCC".
Rod