Unitary ratio selector mechanism for a multiple ratio manual transmission

A manual transmission having gearing adapted to deliver torque from a driving shaft to a driven shaft including a housing, multiple ratio gearing in said housing, and a torque input gear connected to said driving shaft;

• a mainshaft connected to said driven shaft torque transfer gearing including gears disposed coaxially with respect to said mainshaft;
• a countershaft disposed in offset parallel disposition with respect to said mainshaft, countershaft gear elements disposed coaxially with respect to said countershaft;
• multiple synchronizer clutch means for selectively establishing and disestablishing plural torque flow paths through said gears and said gear elements, said synchronizer clutch means including multiple synchronizer clutch sleeves that are shiftable between two axial positions relative to the mainshaft;
• a shift rail offset from said mainshaft, multiple shift forks supported by said shift rail;
• a shift lever including a bellcrank extending transversely relative to said shift rail, shift lever support structure adapted to be secured to said housing;
• a guide plate for said shift lever secured to said support structure, means for pivotally mounting said shift lever on said support structure;
• said shift lever, said guide plate and said support structure defining a unitary subassembly separate from said gearing, an offset lever operatively connected to said bellcrank whereby movement of said lever in a transverse plane causes angular movement of said offset lever and movement of said lever in a plane parallel to said shift rail results in movement of said offset lever in an axial direction,
• the position of said shift lever and said offset lever thereby being established with precision relative to said gears and said gear elements.