Power Flow (cont'd)

In 3rd Gear

  • Hydraulic pressure is applied to the 3rd clutch, then the 3rd clutch engages the secondary shaft 3rd gear with the secondary shaft.
  • The mainshaft idler gear drives the secondary shaft via the idler shaft idler gear and the secondary shaft idler gear.
  • The secondary shaft 3rd gear drives the countershaft 3rd gear and the countershaft.
  • Power is transmitted to the final drive gear, which in turn drives the final driven gear.

In 4th Gear

  • Hydraulic pressure is applied to the servo valve to engage the reverse selector with the countershaft 4th gear and the reverse selector hub while the shift lever is in forward range (D and S).
  • Hydraulic pressure is also applied to the 4th clutch, then the 4th clutch engages the mainshaft 4th gear with the mainshaft.
  • The mainshaft 4th gear drives the countershaft 4th gear and the countershaft.
  • Power is transmitted to the final drive gear, which in turn drives the final driven gear.