Section IV. CONTROLLED DIFFERENTIAL

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Figure 29-20. Tandem Axles with Power Divider.

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TM-9-8000 Principles of Automotive Vehicles Manual

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Figure 29-22. Controlled Differential with Final Drive.

TM 9-8000

Section IV. CONTROLLED DIFFERENTIAL

29-11. Purpose. The controlled differential is used in

29-13. Operation (Fig. 29-21 and 29-22). When the

tracked vehicles for:

vehicle is moving straight ahead, the entire differential

assembly turns as a unit and transmits equal power and

(a) Transmitting engine torque to the tracks.

speed to each track through the final drive. When the

left brake band is applied to the brakedrum, the left

(b) Steering of the vehicle through the controlled

compensating gear is retarded and rotates slower than

use of side-to-side braking.

the differential carrier, while the right compensating gear

is speeded up and rotates faster than the differential

carrier. As each compensating shaft is splined to each

29-12. Construction (Fig. 29-21 and 29-22). The

compensating gear, the final analysis will result in the left

controlled

differential is, in reality, two different

track revolving slower than the right track, causing the

assemblies having left and right units joined by the

vehicle to turn to the left. Exactly the reverse procedure

differential carrier. Each side consists of a brakedrum, a

takes place if the right brake is applied.

sun gear, three external pinions, three internal pinions,

and one compensating gear.

TA233797

Figure 29-21. Controlled Differential.

29-22