Lesson 1
Learning Event:
DESCRIBE THE CONSTRUCTION, OPERATION, AND MAINTENANCE OF
PROPELLER SHAFTS AND UNIVERSAL JOINTS
PROPELLER SHAFTS
On vehicles equipped with a transfer case, power is transferred from the vehicle's
transmission to the transfer case to the axle assemblies by propeller shafts.
FIGURE 1. PROPELLER SHAFTS.
A propeller shaft is also called a drive shaft. However, propeller shaft is the more
common name, and some repairers shorten this to "prop shaft." The illustration shows
the power transmission system, including the propeller shafts in one type of wheeled
vehicle. Notice that four propeller shafts are used to drive the vehicle. One transmits
torque from the transmission to the transfer case, one delivers rotary motion from the
transfer case to the intermediate differential, another delivers rotary motion from the
intermediate differential to the rear differential, and the fourth delivers torque to the front
differential.
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