System Operation
First Gear Powerflow
In 1st gear, the shift shaft assembly slides the 1-2 synchronizer sleeve back onto 1st gear to lock it to the output shaft. Torque is transferred from the input shaft to the countershaft through the countershaft drive gear and from the countershaft to the output shaft through 1st gear.
Second Gear Powerflow
In 2nd gear, the shift shaft assembly slides the 1-2 synchronizer sleeve forward onto 2nd gear to lock it to the output shaft. Torque is transferred from the input shaft to the countershaft through the countershaft drive gear and from the countershaft to the output shaft through 2nd gear.
Third Gear Powerflow
In 3rd gear, the shift shaft assembly slides the 3-4 synchronizer sleeve back onto 3rd gear to lock it to the countershaft. Torque is transferred from the input shaft to the countershaft through the countershaft drive gear and from the countershaft to the output shaft through 3rd gear.
Fourth Gear Powerflow
In 4th gear, the shift shaft assembly slides the 3-4 synchronizer sleeve forward onto 4th gear to lock it to the output shaft. Torque is transferred from the input shaft to the countershaft through the countershaft drive gear and from the countershaft to the output shaft through 4th gear.
Fifth Gear Powerflow
In 5th gear, the shift shaft assembly slides the 5-6 synchronizer sleeve forward onto the input shaft to lock the input shaft to the output shaft. Torque is transferred from the input shaft to the output shaft through the 5-6 synchronizer sleeve and provides direct drive through the transmission.
Sixth Gear Powerflow
In 6th gear, the shift shaft assembly slides the 5-6 synchronizer sleeve back onto 6th gear to lock it to the output shaft. Torque is transferred from the input shaft to the countershaft through the countershaft drive gear and from the countershaft to the output shaft through 6th gear.
Reverse Powerflow
In reverse, the shift shaft assembly slides the reverse synchronizer sleeve back onto reverse gear to lock it to the output shaft. Torque is transferred from the input shaft to the countershaft through the countershaft drive gear and from the countershaft to the output shaft through the reverse gear and reverse idler gear to rotate the output shaft in the opposite direction.