mesa Posted February 17, 2017 Report Share Posted February 17, 2017 I have a Ford F-250 super duty that I have been pulling a 21 ft. gulfstream with for a year, on long flat sections of road I had been putting the overdrive on thinking about saving gas money and all , my neighbor who has been doing this a long time says never to use overdrive that it kills the engine overtime. I am at a loss why as it does not seem to be straining or excessive downshifting. So putting this out there for all the pros. Overdrive or not? Link to comment Share on other sites More sharing options...
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