My Class C has a E4OD transmission and I live in FL where it's flat, so my question is, should I drive all the time with overdrive turned on? It does seem to shift better when I do.
I use OVERDRIVE with my towing usually when on the INTERSTATE for long non-hills driving. I can tell by watching my RPMs if the engine is in any strain and will switch out when needed... Not really sure I get any savings in fuel consumption or not.