Over Drive
I have always wondered if I put an overdrive unit on my RV will do any good. If it gives you a 10% decrease in RMPs does it give you 10% better gas mileage? Or just 2 or 3% better MPGs. Would it be wo...
Forum Discussion
Could help, could actually hurt. the higher final OD gear, Could make the engine work harder / LUG, to stay in OD. IF it does, It will not only hurt your MPG, but could damage your engine
