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
The real advantage of an over drive like Gear Vendors is the ability to split gears. They want to sell you on the MPG increase, but that will take a lot of miles. A friend of mine put a three speed behind his four speed in his gas powered truck. Darn thing pulled like crazy and a Lot of fun to drive, but file mileage increase? Not so much.
