General Information Power Flow The transmission must efficiently transfer the engine's power to the vehicle's driveline. Knowledge of what takes place in the transmission is helpful when troubleshooting and making repairs. 1st Gear
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Power (torque) from the vehicle's engine is transferred to the transmission's input shaft.(1)
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The input shaft external splines engage the main drive gear internal splines.(2)
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Torque is split between the two countershaft drive gears.(3)
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Torque is delivered along both countershafts to the mating countershaft gears of the "engaged" mainshaft gear. The following cross section view illustrates a 1st speed gear engagement.(4)
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The external clutching teeth of the sliding clutch engage with the internal clutching teeth of the mainshaft gear which transfers torque to the mainshaft.(5)
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The mainshaft transfers torque directly to the rear auxiliary drive gear sliding clutch which is in the rearward position.(6)
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The rear auxiliary drive gear splits torque between the two auxiliary countershaft drive gears.(7)
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Torque is delivered along both countershafts to the LO range gear in the auxiliary section.(8)
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The LO range gear delivers torque to the output shaft through the range synchronizer sliding clutch.(9)
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The output shaft delivers torque to the driveline components.(10)
