TM 5-3805-258-24-1
S Y S T E M S O P E R A T I O N
P O W E R T R A IN
T R A N S M I S S I ON
SECOND SPEED REVERSE
POWER FLOW IN SECOND SPEED REVERSE (No. 1 and No. 5 Clutches Engaged)
I. Ring gear for No. 1
clutch.
2. Coupling gear.
3. No. 1 clutch.
7. No. 2 and No. 3 carrier.
When the transmission
9. Ring gear for No. 3
clutch.
10. No. 4 carrier.
11. No. 4 sun gear.
13. Ring gear for No. 4
clutch.
is in SECOND SPEED
REVERSE, No. 1 and No. 5 clutches are engaged.
The No. 1 clutch holds ring gear (1) for the No. 1
clutch stationary. The No. 5 clutch holds rotating
hub (15) stationary.
Input shaft (23) turns No. 1 sun gear (21). No. 1
sun gear turns No. 1 planetary gears (24). No. 1
carrier (20) is in direct mechanical connection with
ring gear (1).
Since ring gear (1) is held stationary by the No. 1
clutch, so is No. 1 carrier (20). The movement of No.
1 planetary gears (24) causes coupling gear (2) to
turn in the opposite direction of input shaft (23).
Coupling gear (2) is in direct mechanical connection
with No. 2 and No. 3 carrier (7). As the No. 2 and
No. 3 carrier turns, No. 3 planetary gears (26) turn.
The No. 3 planetary gears turn ring gear (9) for the
14. No. 5 clutch.
15. Rotating hub.
20, No. 1 carrier.
21. No. 1 sun gear.
22. Output shaft.
No. 3 clutch and
23. Input shaft.
24. No. 1 planetary gears,
26. No. 3 planetary gears.
27. No. 4 planetary geara,
28. Housing aaaembly.
output shaft (22). Ring gear (9)
turns No. 4 carrier (10). As the No. 4 carrier turns,
No. 4 planetary gears (27) turn. The No, 4 planetary
gears turn ring gear (13) for the No. 4 clutch, which
is fastened to housing assembly (28) by bolts. The
No. 4 planetary gears also turn No. 4 sun gear (11).
No. 4 sun gear turns output shaft (22).
Since rotating hub (15) is held stationary by No. 5
clutch (14), power is sent through the No. 5 clutch to
rotating hub (15). Rotating hub (15) turns output
shaft (22).
As a result, torque to output shaft (22) is divided
through No. 3 planetary gears (26), No. 4 sun gear
(11) and rotating hub (15). From the output shaft,
power goes through the output transfer gears to the
differentials.
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