Page 79 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

60

(51)
ASSEMBLY
1-2-3-4 AND 3-5
REVERSE CLUTCH
➤

1-2-3-4
➤ ➤ ➤ ➤ (1) APPLIED CONVERTER CLUTCH TORQUE 1-2-3-4 POWER FROM 3 1
CLUTCH
APPLIED
➤ ➤ DRIVING GEAR INTERNAL INPUT 2
(467)
SPRAG
(52)
HOLDING
INPUT
ASSEMBLY
DRIVEN
CARRIER
LOW CLUTCH
ASSEMBLY
➤
LOW
AND
CLUTCH
REVERSE
(53)
RELEASED
HELD
INPUT
➤ HOLDING (467) ASSEMBLY SPRAG CLUTCH LOW 8 DRIVE RANGE – 1ST GEAR
SUN GEAR
(67)
➤
CENTER
SUPPORT
ASSEMBLY
GEAR
7
INPUT
DRIVING
AND
INTERNAL
LOW
(489)
(68)
REAR
HELD
CLUTCH
Figure 55
REVERSE
DRIVING
RELEASED
OUTPUT
CARRIER
SUN GEAR
ASSEMBLY
➤
6
GEAR
PINION
DRIVING
REAR OUTER
OUTPUT CARRIER
(56)
4-5-6
➤
SHAFT)
CLUTCH
ASSEMBLY
(w/TURBINE
➤ 2 by the converter turbine. ➤ 1 ASSEMBLY DIFFERENTIAL in the Drive position. POWER TO • gear starting ratio of approximately 4.027:1. DRIVING drive shaft. The planetary gears operate in reduction to achieve a 1st (497) GEAR through the torque converter and transmission gearsets to the vehicle’s PINION REAR OUTER REAR REAR CARRIER CARRIER OUTPUT OUTPUT SPRAG 4 CLUTCH 1-2-3-4 LOW DRIVE RANGE – 1ST GEAR
DRIVING
REAR INNER
PINION GEAR
9
OUTPUT CARRIER
GEAR
DRIVEN
OUTPUT
INTERNAL
(497)
➤
GEAR
REAR
DRIVEN
OUTPUT
CARRIER
INTERNAL
5
(489)
(61)
OUTPUT
CARRIER
1-2-3-4
DRIVING
DRIVING
CARRIER
SUN GEAR
REAR INNER
ASSEMBLY
PINION GEAR
(70)
CLUTCH HUB
SHAFT
OUTPUT
ASSEMBLY
•
5
7
8
9
6
4
3
CLUTCH
APPLIED
rotate freely.
assembly (51).
of the sun gear.
CLUTCH
3-5 REV.
rear sun gear (489).
4-5-6
CLUTCH
1-2-3-4 Clutch Applied
2-6
Input Internal Gear Driving
CLUTCH
Power from Torque Converter
Low and Reverse Clutch Released
gears and the output internal rear gear.
transmission to a lower gear ratio, or 2nd gear.
and hold the low clutch sprag outer race.
CLUTCH
Low Clutch Sprag Assembly Holding
Output Carrier Rear Sun Gear Driving
LOW & REV.
Output Carrier Internal Rear Gear Driven
HOLDING
the 1st gear starting ratio of approximately 4.027:1
Output Carrier Rear Inner Pinion Gears Driving
Output Carrier Rear Outer Pinion Gears Driving
the same direction as the turbine shaft but in reduction.
occurs only briefly, until engine braking or 2nd gear is achieved.
components faster than engine torque is driving them. Because
coast, at least briefly until the TCM determines engine braking
low clutch sprag will overrun which allows the vehicle to
In Drive Range (D) 1st gear, torque from the engine is multiplied
the low and reverse clutch is released, the low clutch sprag
The 1-2-3-4 clutch is applied and holds the 1-2-3-4 clutch
is required. At that time, the low and reverse clutch will apply
The output carrier rear sun gear (489) is splined to the 1-2-
The output carrier rear sun gear drives the inner pinion
hub assembly (61), which is splined to the output carrier
and the same direction as the 1-2-3-4 and 3-5 reverse clutch
3-4 clutch hub assembly (61) and rotates at the same speed
from the vehicle wheels attempts to drive the transmission
With the output carrier assembly (68) held, the output carrier
When the throttle is released in Drive Range – 1st Gear, power
gears of the rear carrier assembly in the opposite direction
outer pinion gears drive the internal rear gear (497) to achieve
pinion gears are in mesh with the output rear inner pinion
input carrier pinion gears which rotate around the stationary
As vehicle speed increases, less torque multiplication is needed for
The input internal gear is located in the turbine shaft with 4-
5-6 clutch assembly (56). The input internal gear drives the
(52) in reduction. The input carrier is splined to the 1-2-3-4
and 3-5 reverse clutch assembly (51), which is rotating in
input sun gear (53), thus driving the input carrier assembly
maximum efficiency. Therefore, it is desirable to shift the
as the 1-2-3-4 and 3-5 reverse clutch assembly. The outer
The rear inner planetary pinion gears drive the outer pinion
The power transferred to the output carrier assembly (68) by
gears in the opposite direction, which is the same direction
the output rear outer pinion gears attempts to rotate the carrier,
assembly (467). When the throttle is released, however, the
but the carrier is held stationary by the low clutch sprag
The turbine shaft with 4-5-6 clutch assembly (56) is driven
The low and reverse clutch releases before the 1-2 shift
assembly (467) will overrun and the vehicle is able to coast. This
occurs which will allow the low clutch sprag outer race to
The manual shift shaft (508) and the manual valve (354) are
60A