i said this a long time ago...that OD OFF only goes to 3rd gear and everyone told me....OD OFF still goes to 4th gear.

I thought i was going crazy...now i know they just are.

But yah..i dont see how OD ON is going to burn your tranny out quicker. I think OD off would if your on the highway cause your going at higher speeds which means higher rpms which means more stress on the engine.