Lesson 2/Learning Event 2
FIGURE 13. FULL-FLOATING REAR AXLE.
The fourth type of axle is known as the full-floating type axle. This type of axle is used
on military tactical wheeled vehicles.
The major difference between the three-quarter and full-floating axles is that two bearings
are used to mount the wheel on the axle housing instead of one bearing. With this
method of construction, the axle shaft may be removed without disturbing the wheel or
differential assembly. The axle shaft on a full-floating axle has a flange at the outer end.
The flange connects the axle shaft to the hub of the wheel. It is through the flange that
the axle shaft drives the wheel. On rear axles, the flange is a part of the axle shaft. On
front axles, the end of the shaft is splined and a splined flange slides over the end of the
shaft and is bolted to the wheel hub.
Final Drives - Gears
A final drive is the part of the power train between the propeller shaft and the
differential. It is the part of the axle assembly that provides the 90 change in direction
of the power flow and increases torque or turning force.