Power Flow: Notes

Gear operation

Gears on the mainshaft:

• 4th gear is engaged/disengaged with the mainshaft by the 4th clutch.
• 5th gear is engaged/disengaged with the mainshaft by the 5th clutch.
• Reverse gear is engaged/disengaged with the mainshaft by the 5th clutch.
• 3rd gear is splined with the mainshaft and rotates with the mainshaft.

  Gears on the countershaft:

• The final gear is integral with the countershaft.
• 1st gear, 4th gear, 2nd gear and park gear are splined with the countershaft, and rotate with the countershaft.
• 5th gear and reverse gear rotate freely from the countershaft. The reverse selector engages 5th gear and reverse gear with the reverse selector hub. The reverse selector hub is splined to the countershaft so 5th gear and reverse gear engage with the countershaft.
• 3rd gear is engaged/disengaged with the countershaft by the 3rd clutch.

  Gears on the secondary shaft:

• 1st gear is engaged/disengaged with the secondary shaft by the 1st clutch. The 1st gear is engaged with the secondary shaft by the 1st-hold clutch and the one-way clutch when decelerating using for engine braking.
• 2nd gear is engaged/disengaged with the secondary shaft by the 2nd clutch.
• Idler gear is splined with the secondary shaft, and rotates with the secondary shaft.