when to use "econo mode" on Allison 5 speed tranny?
Is it for city or country driving? nothing listed in the manual.
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From my research, it changes the transmission behavior. The modes have to be programmed. On mine it supposedly modifies the shift points to give better fuel economy. I tried it for several thousand miles and found no noticeable change in fuel economy or shifting behavior. It could be that mine was never actually programmed. I just leave mine in normal mode.
