TRUCK SERVICE MANUAL
TRANSMISSION
HT 700D SERIES TRANSMISSIONS
Para 2-28
Fig. 2-14. Reverse-gear torque path
i. Reverse-Gear Operation (fig. 2-14). Engine
together to form one stationary unit. When he center
torque is transmitted through the torque converter as
sun gear rotates, it causes the pinions in the center
described in a, above. Reverse gear is the only gear in
carrier to rotate in the opposite direction. This rotates
which the forward clutch is not engaged. In this gear, the
the center carrier ring gear in a counterclockwise
fourth clutch is applied and rotates the sun gear shaft,
direction (reverse of input). This reverse rotation is
via the fourth-clutch housing, at input speed. The low
transferred through the main shaft and the low planetary
clutch is also applied and anchors the low ring gear
carrier to the output haft. Thus the transmission output
against rotation. In turn, the low ring gear, rear carrier,
shaft rotates in a reverse direction at a speed reduction
center carrier and connecting drum are splined
of 7.97:1.
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