Intermediate-Range Clutch and Planetary

2-3. Intermediate-Range Clutch and Planetary

tanged plates, 3 internal-splined plates, and 12

return springs (47). The intermediate-range

a. Intermediate-Range Clutch Components (fig.

housing assembly (22) serves as the low-range

2-1). The intermediate-range clutch includes a

clutch back plate. The low- and reverse-range

stationary back plate assembly (18), piston (21),

housing assembly (26) serves jointly for the low-

three internal-splined, and two external-tanged

and reverse-range clutches. Pins in the housing

clutch plates (19), and ten return springs (51). The

assembly anchor the low-range, external-tanged

piston housing assembly (22) serves also as a

clutch plates, as well as the reverse-range, external-

reaction plate for the low-range clutch.

tanged plates, against rotation.

b. Intermediate-Range Planetary Gears (fig. 2-

b. Low-Range Planetary Gears (fig. 2-1).

1).

(1) A 21-tooth sun gear (46), 59-tooth (in-

(1) A 31-tooth sun gear (53), 59-tooth (in-

ternal) ring gear (23), and a carrier assembly and

ternal) ring gear (20), and a carrier assembly (54)

transmission o u t p u t shaft with four 19-tooth

w i t h four 14-tooth pinions make up the in-

pinions make up the low-range gear set. The sun

termediate-range gear set. The sun gear is the

gear is the driving member, the ring gear is the

driving member, the ring gear is the reaction

reaction member, and the carrier assembly and

member, and the carrier assembly is the driven

output shaft is the driven member.

member.

(2) The sun gear (46) is splined to the turbine

(2) The sun gear (53) is splined to the turbine

shaft (59) and meshes with the carrier pinions. The

carrier assembly is integral with the transmission

carrier assembly (54) includes splines at the front

output shaft (33). The carrier pinions mesh with

which engage the internal-splined, high-range

both the sun gear (46) and ring gear (23). The ring

clutch plates (17), and splines at the rear which

gear internal teeth mesh with the carrier pinions.

engage the low-range ring gear (23). The carrier

The ring gear external splines engage the low-

pinions mesh with both the sun gear (53) and ring

range, internal-splined plates. At the front, the ring

gear (20). The ring gear internal teeth mesh with

the carrier pinions. Its external splines engage the

gear (23) is attached to the intermediate-range

intern al-splined clutch plates (19). A retainer at the

carrier (54). At its rear, the ring gear is attached to

the reverse-range sun gear shaft (40).

outer circumference of the ring gear (20) prevents

c. operation of Low-Range Clutch and Planetary

the gear moving forward or rearward.

c. Operation of Intermediate-Range Clutch and

Gears (fig. 2-1).

Planetary Gears (fig. 2-1).

(1) When the low-range clutch (24) is applied,

the clutch piston compresses the clutch plates

(1) When the intermediate-range clutch (19) is

against the housing (22). This holds the ring gear

applied. the clutch piston compresses the clutch

(23) stationary+ The sun gear (46) drives carrier

plates against the back plate (18). This holds the

ring gear (20) stationary. The sun gear (53) drives

assembly and output shaft (33) at reduced speed.

(2) The speed reduction in the low-range

the carrier assembly (54) and low-range ring gear

planetary is 3.81 to 1 for low-range operation. The

(23) at reduced speed. The low-range sun gear (46)

low-range gears have another role in reverse-range

(rotating at the same speed as the intermediate-

range sun gear (53) and the low-range ring gear

operation. They are compounded with the reverse-

(23) (rotating at a lower speed) combine to drive

range gears (para 2-5).

the low-range planetary carrier and transmission

(3) When the low-range clutch is released.

output shaft at a different rate of speed.

springs (47) push the piston (25) back into the

(2) The actual speed reduction ratio in the

housing (26). This permits the low-range, internal-

splined plates to rotate independently of the

intermediate-range gear set is 2.90 to 1. However,

stationary . external-tanged plates.

when this ratio is combined with that of the low-

range gear set. the overall speed reduction ratio is

2-5. Reverse-Range Clutch and Planetary

1.93 to 1. The interaction of two planetary gear sets

a. Reverse-Range Clutch Components (fig. 2-1).

to produce a desired ratio is called compounding.

The reverse-range clutch includes a stationary back

(3) When hydraulic pressure is exhausted

plate (30), piston (27). 4 internal-splined and 3

from the intermediate-range clutch piston housing,

external-tanged clutch plates (28), and 12 return

springs (51) return the piston (21) into the housing

springs (43). The piston housing assembly (26)

bore. Released, the internal-splined clutch plates

serves jointly for the reverse- and low-range

rotate independently of the stationary, external-

clutches. Pins in the housing assembly anchor the

tanged plates.

reverse-range, external-tanged clutch plates, as well

2-4. Low-Range Clutch and Planetary

as the low-range, external-tanged clutch plates,

a. Low-Range Clutch Components (fig. 2-1).

against rotation.

b. Reverse-Range Planetary Gears (fig. 2-1).

The low-range clutch (24) includes 3 external-

2-4