THEORY AND OPERATION
General Description of Types of Driveshafts
Type 1-1 Driveshaft
The driveshaft is a steel tube which is used to transmit power from the transmission output shaft to the differential (Figure 17)
Fig. 17 1-1 driveshaft with solid tube
On some models the driveshaft is made up of concentric steel tubes with rubber elements between (Figure 18).
Fig. 18 - Type 1-1 driveshaft with rubber element in tube
To accomodate various model wheelbase and transmission combinations, driveshafts differ in length, diameter and the type of slip yoke.
Each shaft is installed in the same manner. A universal joint (Cardan type) and splined slip yoke are located at the transmission end of the shaft, where they are held in alignment by a bushing in the transmission rear extension. The slip yoke permits fore and aft movement of the driveshaft as the differential assembly moves up and down. The spline is lubricated internally by transmission lubrication or grease. An oil seal at the transmission prevents leakage and protects the slip yoke from dust, dirt and other harmful material . From some automatic transmissions, the slip yoke spline is lubricated with grease and provided with a small vent hole.
The slip yokes should be inspected to be sure the vent hole is clear (Figure 19).
A second universal joint attached by two U-bolts or two straps is used where the driveshaft mates with the companion flange at the rear. Top of Page
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