I recently traded for the elusive 8X8 Swamp Fox in Alaska and am trying to get it going. It appears to have the T20 tranny with an additional 2 speed tranny. The engine powers the 2 speed, High, Low, Nuetral, Reverse, that is chain connected to the T20. Should the T20 be left in Foreward all the time and the 2 speed used for full time or what?