OD will not put any drag on the motor. if your gearbox is low on oil, it will simply not engage. On Fri, Aug 27, 2010 at 9:58 AM, mdoust <mdoust at allstream.net> wrote: > Yes it stumbles. No filters. cap, rotor, plug wires steel all check out. > What about a problem with the overdrive putting a big time drag on the > engine > > > > Mark