Page 105 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

2
3
72B

range.
clutch.
to close.
TCC release.

1d 3-5 Reverse Clutch:
1e Clutch Select Valve 3:

3-5 REVERSE CLUTCH APPLIES
3a TCC Pressure Control Solenoid:
Page 98
1-2-3-4 clutch boost valve to exhaust.
2a C1234 Pressure Control Solenoid 5:
1c 3-5 Reverse Clutch Regulator Valve:
TORQUE CONVERTER CLUTCH RELEASES
2b 2-6 CB26 Pressure Control Solenoid 4:
COMPLETE HYDRAULIC CIRCUIT

1-2-3-4 CLUTCH RELEASES or 2-6 CLUTCH RELEASES
CLUTCH
the 2-6 clutch regulator valve, and the 2-6 clutch to exhaust.
SPRAG
through the valve and enters the 35 reverse clutch feedback circuit.
As PCS 35 reverse clutch fluid pressure is increased to a given
4 defaults to the OFF position, allowing PCS 26 clutch fluid from
PCS 35 reverse clutch fluid moves the 3-5 reverse clutch regulator
commands a protection mode, the CB26 pressure control solenoid
clutch regulator valve moving to the full feed position sending
commands a protection mode, the C1234 pressure control solenoid
5 defaults to the OFF position, allowing PCS 1234 clutch fluid
from the 1-2-3-4 clutch, the 1-2-3-4 clutch regulator valve and
full 35 reverse clutch feed pressure (full line pressure) to the
value, the 3-5 reverse clutch boost valve opens the 35 reverse
If the transmission was in 6th gear when an electrical condition
If the transmission was in 4th gear when an electrical condition
clutch feedback circuit to exhaust. This results in the 3-5 reverse
pressure switch 1 exhausts through the valve, allowing the switch
force from the compensator to apply the 3-5 reverse clutch plates.
housing to move the piston against spring force combined with
The TCC pressure control solenoid will default to it's normal
reverse clutch fluid is then routed to the 3-5 reverse clutch, the 3-5
gear, it will remain in this position throughout the 5th gear default
Once the clutch select valve 3 is moved to the ON position in 4th
35 reverse clutch fluid enters the 1-2-3-4 & 3-5 reverse clutch
TCC apply fluid will then be routed to the cooler, and TCC
release fluid will be routed to the torque converter for complete
state, OFF. PCS TCC fluid will exhaust from the TCC control
reverse boost valve and the clutch select valve 2. When the 3-5
valve, and spring force will shuttle the valve to the off position.
range, until the ignition has been turned OFF. When the ignition
is OFF, fluid will exhaust from the valve, thus when the vehicle
reverse clutch regulator valve is in this position, PS1 fluid from the
is restarted, the transmission will then be in the 3rd gear default
valve against 3-5 reverse clutch regulator valve spring force and
35 reverse clutch feedback fluid. This allows 35 reverse feed to
pass through the valve and enter the 35 reverse clutch circuit. 35
COOLER FD reverse clutch boost valve spring. 3-5 reverse clutch fluid passes moving the PCS 3-5 reverse clutch boost valve against the 3-5 PCS 3-5 reverse clutch fluid pressure acts on a differential area 1b 3-5 Reverse Clutch Boost Valve: EX reverse clutch boost valve. clutch fluid is also routed through orifice #40 and then to the 3-5 then to the 3-5 reverse clutch regulator valve. PCS 35 reverse PCS 35 reverse clutch fluid is routed through orifice #48 and actuator feed fluid to enter the PCS 35 reverse clutch flui
TCC APPLY TCC REL 7
TCC CONTROL VALVE
3
CONV FD LIMIT OFF SOL 1 SHIFT N.C. VALVE ASSEMBLY SOLENOID CONTROL
REG APP
PCS TCC
LINE
C35R
N.H.
N.L.
N.L.
CB26
N.H.
C1234
N.H.
N.L.
N.C.
TCC
SHIFT
SOL 2
OFF
CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
PRESSURE
PRESSURE
SOLENOID
ON
ON
PRESSURE
OFF
CBR1/C456
PRESSURE
SOLENOID
PRESSURE
OFF
PRESSURE
OFF
SOLENOID 2
SOLENOID 5
SOLENOID 3
SOLENOID 4
2a
2b
3a
1a
ACT FD LIM SOL 1 CLUTCH 1-2-3-4
N.C.
1
4
N.C.
N.C.
3
PS1
PS3
PS4
PCS LINE ACT FD LIM SOL 2 PCS 26 CL ACT FD LIM ACT FD LIM SOL 1 COMP FEED
ACT FD LIM
ACT FD LIM
ACT FD LIM ACT FD LIM LINE
PCS 1234 CL
PCS CBR1/456 CL CLUTCH REVERSE 3-5
PS3
LINE LINE LINE 35 REV CLUTCH 1234 CLUTCH
COMP FD COMP FD 26 COMP FD
EX BF PCS 26 CL PCS CBR1/456 CL 1d
PS4
44
1c
42
EX BACKFILL
48
EX BACKFILL
36
EX PCS TCC 39 35 REV CLUTCH 1234 CLUTCH COMP FD
ACT FD LIM
35
SHTL
EX 40 35R CL BOOST VALVE 456 CL 456 CL BOOST VALVE 31 EX
PCS 35 REV CL
2-6 GAIN
47
EX BF EX BF 30 LINE EX BF
2b
EX 46 26 CL 2-6 CLUTCH REG 43 CBR1/456 CL FD 38
34
35R FD PS1 CBR1/C456 CL REG VALVE
ACT FD LIM 3-5 REV CL REGULATOR VALVE EX PS3 EXHAUST BACKFILL EX
33
EX PRESSURE RELIEF VALVE PS5
PCS 1234 CL
1234 CL DFLT
LINE
PS4 1234 CL EX 35 REV CL FDBK CBR1 FDBK EX ACT FD LIM LINE (T orque Converter Clutch Released)
COMP FD
EX #7 35 REV CL 1b 26 CL/1234 CL FD CBR1/456 CL FD 37 DRIVE 1-6 ASSEMBLY CLUTCH 4-5-6 DRIVE RANGE - 5TH GEAR DEFAULT
1-2-3-4 CL REGULATOR VALVE
26 CL 41
1234 CL FD
35 REV CL 35 REV CLUTCH 456 CLUTCH
Figure 68
45
25
50
1234 CL 1234 CL 1234 CLUTCH
DRIVE 1-6
#6
35R SPL #5 26 CL #4 26 CLUTCH
23
32
26 CL/1234 CL FD PS5 26 CLUTCH ASSEMBLY 2-6 CLUTCH
1234 CL FDBK
456 CL 456 CLUTCH
PCS TCC 12 ACT FD LIM
CBR 1
DRIVE 1-6 LINE
ACT FEED LIMIT VALVE CBR
1234 CL
CSV2 LATCH
LINE ASSEMBLY CENTER SUPPORT
35 REV CL
#1
PCS 1234 CL ASSEMBLY CLUTCH REVERSE LOW &
35 CL REV FD
REVERSE DRIVE
29
REG APPLY
1234 CL DRIVE
1234 CL FDBK DRIVE BRAKE DRV B DRIVE BRAKE CBR1/456 CL FD
1234 CL DFLT
35 CL REV FD
EX 11 DRV B
1234 CL BOOST VALVE
LINE
LINE
EX DRIVE
COMP FD
REVERSE EX EX
EX 456 CL MANUAL VALVE
DRIVE 1-6
456 CL FD 456 CL FD
14
REVERSE
REG APPLY
EX CLUTCH SELECT VALVE 2
EX EX CBR1/CBR FD EX
CBR
CLUTCH SELECT VALVE 3
13
LINE FD REG VALVE COMPENSATOR CBR1/CBR FD EX
PCS TCC
COMP FD 10 9 21 DRIVE 1-6 M
SOL 1 DRIVE
TCC REGULATOR VALVE SHTL
EX 1234 CL DFLT FD EX D
1234 CL DFLT FD N
CSV3 ENABLE R
35 REV CL
SOL 2
20
1e
#3
456 CL 22 CSV2 ENABLE P
73