Torque Converters
The torque converter is a fluid clutch that performs the same basic function as a manual transmission dry friction clutch (Figure 10-16). It provides a means of uncoupling the engine…
Automatic Transmissions
The automatic transmission, like the manual transmission, is designed to match the load requirements of the vehicle to the power and speed range of the engine (Figure 10-15). The automatic…
Transmission Overhaul
Because of the variations in construction of transmissions, always refer to the manufacturer’s service manual for proper procedures in the removal, disassembly, repair, assembly, and installation. The time to carry…
Transmission Troubleshooting
Transmissions are designed to last for the life of the vehicle when lubricated and operated properly. The most common cause of failure results from shifting when the vehicle is not…
Auxiliary Transmissions
The auxiliary transmission is used to provide additional gear ratios in the power train (Figure 10-13). This transmission is installed behind the main transmission, and power flows directly to it…
Transmission Types
Modern manual transmissions are divided into two major categories: • Constant mesh • Synchromesh Constant Mesh Transmission The constant mesh transmission has two parallel shafts where all forward gears of…
Shift Forks, Shift Linkage and Levers
Shift Forks Shift forks fit around the synchronizer sleeves to transfer movement to the sleeves from the shift linkage. The shift fork sits in a groove cut into the synchronizer…
Synchronizers
The synchronizer is a drum or sleeve that slides back and forth on the splined main shaft by means of the shifting fork. Generally, it has a bronze cone on…
Transmission Gears
Transmission gears can be classified into four groups—input gear, countershaft gears, main shaft gears, and the reverse idler gear. The input gear turns the countershaft gears, the countershaft gears turns…
Transmission Construction
Before understanding the operation and power flow through a manual transmission, you first must understand the construction of the transmission so you will be able to diagnose and repair damaged…
