Page 80 - 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
3
➤
CLUTCH
APPLIED
➤
(467)
(52)
SPRAG
HOLDING
INPUT
DRIVEN
ASSEMBLY
CARRIER
GEAR
LOW CLUTCH
INPUT
ASSEMBLY
➤
INTERNAL
AND
LOW
CLUTCH
REVERSE
(53)
RELEASED
HELD
8
INPUT
➤
LOW
SUN GEAR
SPRAG
CLUTCH
ASSEMBLY
(67)
➤
CENTER
SUPPORT
ASSEMBLY
GEAR
INPUT
7
DRIVING
AND
LOW
INTERNAL
(489)
(68)
REAR
HELD
CLUTCH
Figure 55
REVERSE
DRIVING
RELEASED
CARRIER
OUTPUT
SUN GEAR
ASSEMBLY
➤
6
REAR
GEAR
PINION
OUTER
OUTPUT
CARRIER
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) HOLDING through the torque converter and transmission gearsets to the vehicle’s (467) REAR DRIVING (1) REAR APPLIED CONVERTER CARRIER CLUTCH TORQUE OUTPUT 1-2-3-4 POWER FROM SPRAG 4 2 1 CLUTCH 1-2-3-4 LOW DRIVE RANGE – 1ST GEAR
DRIVING
REAR INNER
9
PINION GEAR
GEAR
OUTPUT CARRIER
DRIVEN
OUTPUT
INTERNAL
➤
(497)
REAR
GEAR
DRIVEN
OUTPUT
CARRIER
INTERNAL
5
(489)
(61)
CARRIER
OUTPUT
DRIVING
DRIVING
1-2-3-4
CARRIER
SUN GEAR
REAR INNER
ASSEMBLY
PINION GEAR
(70)
CLUTCH HUB
SHAFT
OUTPUT
ASSEMBLY
•
9
3
6
5
7
8
4
CLUTCH
APPLIED
rotate freely.
assembly (51).
of the sun gear.
3-5 REV.
CLUTCH
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
DRIVE RANGE – 1ST GEAR
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.
maximum efficiency. Therefore, it is desirable to shift the
outer pinion gears drive the internal rear gear (497) to achieve
With the output carrier assembly (68) held, the output carrier
As vehicle speed increases, less torque multiplication is needed for
gears of the rear carrier assembly in the opposite direction
The rear inner planetary pinion gears drive the outer pinion
The output carrier rear sun gear drives the inner pinion
3-4 clutch hub assembly (61) and rotates at the same speed
and the same direction as the 1-2-3-4 and 3-5 reverse clutch
as the 1-2-3-4 and 3-5 reverse clutch assembly. The outer
pinion gears are in mesh with the output rear inner pinion
The low and reverse clutch releases before the 1-2 shift
gears in the opposite direction, which is the same direction
occurs which will allow the low clutch sprag outer race to
The output carrier rear sun gear (489) is splined to the 1-2-
5-6 clutch assembly (56). The input internal gear drives the
input carrier pinion gears which rotate around the stationary
The input internal gear is located in the turbine shaft with 4-
The manual shift shaft (508) and the manual valve (354) are
The turbine shaft with 4-5-6 clutch assembly (56) is driven
The 1-2-3-4 clutch is applied and holds the 1-2-3-4 clutch
hub assembly (61), which is splined to the output carrier
and 3-5 reverse clutch assembly (51), which is rotating in
input sun gear (53), thus driving the input carrier assembly
(52) in reduction. The input carrier is splined to the 1-2-3-4
low clutch sprag will overrun which allows the vehicle to
coast, at least briefly until the TCM determines engine braking
is required. At that time, the low and reverse clutch will apply
assembly (467). When the throttle is released, however, the
The power transferred to the output carrier assembly (68) by
the output rear outer pinion gears attempts to rotate the carrier,
but the carrier is held stationary by the low clutch sprag
components faster than engine torque is driving them. Because
the low and reverse clutch is released, the low clutch sprag
assembly (467) will overrun and the vehicle is able to coast. This
When the throttle is released in Drive Range – 1st Gear, power
In Drive Range (D) 1st gear, torque from the engine is multiplied
from the vehicle wheels attempts to drive the transmission
60A