Page 75 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

58

➤ (1) CONVERTER TORQUE POWER TO
(51)
ASSEMBLY
➤
1-2-3-4 AND 3-5
REVERSE CLUTCH
➤ ➤ ➤ ➤ APPLIED CLUTCH 1-2-3-4 8
1-2-3-4
CLUTCH
APPLIED

(467)
(52)
SPRAG
➤ ➤ DRIVEN GEAR INTERNAL INPUT 9
HOLDING
INPUT
ASSEMBLY
DRIVING
CARRIER
LOW CLUTCH
ASSEMBLY
➤
AND
LOW
APPLIED
CLUTCH
(53)
REVERSE
HELD
INPUT
SUN GEAR
➤ ➤ HOLDING (467) ASSEMBLY SPRAG CLUTCH LOW 4 (Engine Braking) DRIVE RANGE – 1ST GEAR
(67)
CENTER
SUPPORT
ASSEMBLY
3
GEAR
INPUT
LOW
AND
DRIVEN
INTERNAL
CLUTCH
(68)
REVERSE
(489)
REAR
APPLIED*
HELD
Figure 53
DRIVEN
OUTPUT
CARRIER
SUN GEAR
ASSEMBLY
➤ DRIVEN GEAR PINION OUTER REAR CARRIER OUTPUT 5
GEAR
PINION
DRIVEN
➤ ➤ ➤ DRIVING (497) GEAR REAR INTERNAL CARRIER OUTPUT 2
REAR OUTER
OUTPUT CARRIER
(56)
4-5-6
SHAFT)
CLUTCH
ASSEMBLY
(w/TURBINE
DRIVEN
REAR INNER
PINION GEAR
OUTPUT CARRIER
➤ conditions) and how engine compression braking is achieved. Transfer of describes 1st gear conditions during deceleration (zero or minimum throttle Note: The powerflow for 1st gear (Engine Braking) shown in figure 53 the vehicle. assembly (467) is prevented from overrunning and engine braking slows and holds the output carrier assembly stationary, the low clutch sprag torque is driving them. Because the low and reverse clutch is applied ASSEMBLY wheels attempts to drive the transmission components fast
(497)
REAR
GEAR
DRIVING
OUTPUT
CARRIER
INTERNAL
6
(489)
(61)
DRIVEN
OUTPUT
1-2-3-4
CARRIER
1
REAR INNER
ASSEMBLY
PINION GEARS
(70)
CLUTCH HUB
SHAFT
OUTPUT
ASSEMBLY
*APPLIED BEFORE THE FIRST 1-2 SHIFT HAS OCCURED.
•
6
1
9
8
5
2
7
4
3
2nd gear.
gear.
shift.
pinions.
pages 60 and 60B.
Drive position.
3-5 REV.
CLUTCH
input sun gear (53).
clutch assembly (51).
4-5-6
1-2-3-4 Clutch Applied
CLUTCH
to a lower gear ratio, or 2nd gear.
Input Internal Gear Driven
2-6
CLUTCH
Low and Reverse Clutch Applied
Low Clutch Sprag Assembly Holding
Output Carrier Rear Sun Gear Driven
CLUTCH
APPLIED*
Power From the Differential Assembly
LOW & REV.
Output Carrier Internal Rear Gear Driving
the transmission to the 1-2-3-4 clutch assembly.
SPRAG
Output Carrier Rear Inner Pinion Gears Driven
HOLDING
Output Carrier Rear Outer Pinion Gears Driven
component functions and rotates the same as in acceleration.
carrier is held stationary by the low clutch sprag assembly (467).
pinions and in turn, drive the output carrier rear sun gear (489).
58A
clutch hub assembly (61), continuing power flow back through
input carrier assembly is splined to the 1-2-3-4 and 3-5 reverse
The output carrier rear sun gear (489) is splined to the 1-2-3-4
gear (489), continues on to the input carrier assembly (52). The
hub assembly (61), which is splined to the output carrier rear sun
the input carrier pinion gears which rotate around the stationary
4-5-6 clutch assembly (56). The input internal gear is driven by
The input internal gear is located in the turbine shaft with
The 1-2-3-4 clutch is applied and power from the 1-2-3-4 clutch
internal rear gear to drive the output carrier rear outer pinion
and the vehicle will be allowed to coast brake instead of having engine
Power from the output shaft travels through the output carrier
maximum efficiency. Therefore, it is desirable to shift the transmission
NOTE: Just before the 1-2 shift, the low and reverse clutch will release
engine braking available up to a calibrated point before the 1-2
outer race. This assists the low clutch sprag in holding the output
support assembly (67), is applied and holds the low clutch sprag
carrier assembly (68) stationary. The low and reverse clutch will
The low and reverse clutch, which is located within the center
release before the 1-2 shift occurs. The transmission will have
The power transferred to the output carrier assembly (68) by the
braking. The release of the low and reverse clutch at this time enables a
which are driven by the internal gear, drive the output inner
smooth 1-2 shift as only one component will need to apply to achieve
The output carrier rear inner pinion gears are driven by the outer
engine torque during acceleration is identical to 1st gear as described on
The manual shift shaft (508) and the manual valve (354) are in the
As vehicle speed increases, less torque multiplication is needed for
output shaft to the 4-5-6 (w/turbine shaft) clutch assembly. Each
output rear outer pinion gears attempts to rotate the carrier, but the
With the output carrier held, the output carrier rear outer pinions
Power flow is transferred back through the transmission from the