Part 3
Transaxle Operation
Transaxle Operation Overview
4th Gear
Mechanical Operation
Apply components:
- Forward (1, 2, 3, 4) clutch
- Overdrive (O/D) (4, 5, 6) clutch
Planetary Gearset Operation
Front planetary gearset driven components:
- Planetary carrier
- Ring gear
Center planetary gearset driven components:
- Sun gear
- Planetary carrier
- Ring gear
Rear planetary gearset driven components:
- Planetary carrier
Front planetary gearset held components:
- Sun gear
Center planetary gearset held components:
- None
Rear planetary gearset held components:
- None
4th Gear Clutch Application Chart
For component information, refer to Mechanical Components and Functions Mechanical Components and Functions.
Power Flow
Hydraulic Operation
Line pressure hydraulic circuits:
- Line pressure from the pump is supplied to the manual valve.
- Line pressure is regulated by the pressure regulator valve.
- The pressure regulator valve is controlled by varying pressure from the LPC (Line Pressure Control) solenoid through the LPC (Line Pressure Control) circuit.
Torque converter circuits:
- Regulated line pressure from the pressure regulator valve is directed to the TCC (Torque Converter Clutch) control valve through the CONV FD hydraulic circuit.
- When the TCC (Torque Converter Clutch) is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC (Torque Converter Clutch) control valve. Pressure from the TCC RELEASE circuit releases the TCC (Torque Converter Clutch) .
- Transmission fluid from the TCC RELEASE returns to the TCC (Torque Converter Clutch) control valve through the TCC APPLY circuit.
Cooler and lubrication hydraulic circuits:
- The TCC (Torque Converter Clutch) control valve directs transmission fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC (Torque Converter Clutch) is released) to the COOLER FEED circuit.
- In the COOLER FEED circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit.
Solenoid hydraulic circuits:
- The LPC (Line Pressure Control) solenoid applies varying pressure to the pressure control valve through the LPC (Line Pressure Control) hydraulic circuit. The LPC (Line Pressure Control) solenoid regulates line pressure by controlling the position of the pressure regulator valve.
- SSA (Shift Solenoid A) applies pressure to the forward (1, 2, 3, 4) clutch regulator valve to apply the forward clutch.
- SSD (Shift Solenoid D) applies pressure to the low/reverse/overdrive (4, 5, 6) clutch regulator valve to apply the O/D (Overdrive) clutch.
Clutch hydraulic circuits:
- Line pressure from the manual valve is directed to the multiplex shift valve through the DRIVE 1 hydraulic circuit.
- The multiplex shift valve directs DRIVE 1 pressure to the forward (1, 2, 3, 4) clutch regulator valve through the DRIVE 2, CB26FD/CB1234FD and CB1234 SUP hydraulic circuits. The DRIVE 2 hydraulic circuit also feeds the CBLR/C456 clutch regulator valve.
- Regulated CB1234 SUP pressure from the forward (1, 2, 3, 4) clutch regulator valve is directed to the forward (1, 2, 3, 4) clutch through the CB1234 hydraulic circuit to apply the clutch.
- Line pressure from the pump is supplied to the low/reverse/overdrive (4, 5, 6) regulator valve through the LINE hydraulic circuit.
- To apply the overdrive (4, 5, 6) clutch, SSD (Shift Solenoid D) applies varying solenoid pressure to the CBLR/C456 regulator and boost valves. As the CBLR/C456 regulator valve moves, it supplies the multiplex shift valve assembly and CBLR/C456 boost valve with regulated line pressure through the CBLR/C456 SUPPLY circuit. The CBLR/C456 boost valve directs the regulated line pressure to the opposite side of the CBLR/C456 regulator valve through the CBLR/C456 FDBK circuit for gradual overdrive (4, 5, 6) clutch engagement.
- The multiplex shift valve directs the transmission fluid to the multiplex manual valve through the C456 SUPPLY hydraulic circuit.
- The multiplex manual valve directs pressure from the C456 SUPPLY circuit to the O/D (Overdrive) (4, 5, 6) clutch through the C456 hydraulic circuit to apply the clutch.
- The C456 hydraulic circuit supplies pressure to latch the multiplex shift valve and also supplies pressure to the intermediate (2, 6) clutch regulator valve.
For additional hydraulic circuit and information, refer to Hydraulic Circuits Hydraulic Circuits.
Electrical Operation
Solenoid operation:
4th Gear (TCC (Torque Converter Clutch) Released) Solenoid Operation Chart
NC = Normally closed
NH = Normally high
NL = Normally low
5th Gear
Mechanical Operation
Apply components:
- O/D (Overdrive) (4, 5, 6) clutch
- Direct (3, 5, R) clutch
Planetary Gearset Operation
Front planetary gearset driven components:
- Planetary carrier
Center planetary gearset driven components:
- Sun gear (does not contribute to power flow)
Rear planetary gearset driven components:
- Sun gear
- Planetary carrier
- Ring gear
Front planetary gearset held components:
- None
Center planetary gearset held components:
- None
Rear planetary gearset held components:
- None
5th Gear Clutch Application Chart
For component information, refer to Mechanical Components and Functions Mechanical Components and Functions.
Power Flow
Hydraulic Operation
Line pressure hydraulic circuits:
- Line pressure from the pump is supplied to the manual valve.
- Line pressure is regulated by the pressure regulator valve.
- The pressure regulator valve is controlled by varying pressure from the LPC (Line Pressure Control) solenoid through the LPC (Line Pressure Control) circuit.
Torque converter circuits:
- Regulated line pressure from the pressure regulator valve is directed to the TCC (Torque Converter Clutch) control valve through the CONV FD hydraulic circuit.
- When the TCC (Torque Converter Clutch) is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC (Torque Converter Clutch) control valve. Pressure from the TCC RELEASE circuit releases the TCC (Torque Converter Clutch) .
- Transmission fluid from the TCC RELEASE returns to the TCC (Torque Converter Clutch) control valve through the TCC APPLY circuit.
Cooler and lubrication hydraulic circuits:
- The TCC (Torque Converter Clutch) control valve directs transmission fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC (Torque Converter Clutch) is released) to the COOLER FEED circuit.
- In the COOLER FEED circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit.
Solenoid hydraulic circuits:
- The LPC (Line Pressure Control) solenoid applies varying pressure to the pressure control valve through the LPC (Line Pressure Control) hydraulic circuit. The LPC (Line Pressure Control) solenoid regulates line pressure by controlling the position of the pressure regulator valve.
- SSB (Shift Solenoid B) applies pressure to the direct (3, 5, R) clutch regulator valve to apply the direct clutch.
- SSD (Shift Solenoid D) applies pressure to the low/reverse/overdrive (4, 5, 6) clutch regulator valve to apply the O/D (Overdrive) clutch.
Clutch hydraulic circuits:
- Line pressure from the manual valve is directed to the multiplex shift valve through the DRIVE 1 hydraulic circuit.
- The multiplex shift valve directs DRIVE 1 pressure to the C35R clutch regulator valve through the DRIVE 2 and C35R SUPPLY hydraulic circuits.
- Line pressure from the pump is supplied to the low/reverse/overdrive (4, 5, 6) regulator valve.
- Regulated line pressure from the low/reverse/overdrive (4, 5, 6) regulator valve is sent to the multiplex shift valve assembly through the CBLR/C456 SUPPLY hydraulic circuit.
- The multiplex shift valve directs the CBLR/C456 SUPPLY transmission fluid to the multiplex manual valve through the C456 SUPPLY hydraulic circuit.
- The multiplex manual valve directs pressure from the C456 SUPPLY circuit to the Overdrive (O/D) (4, 5, 6) clutch through the C456 hydraulic circuit to apply the clutch.
- The C456 hydraulic circuit supplies pressure to latch the multiplex shift valve and also supplies pressure to the intermediate (2, 6) clutch regulator valve.
- To apply the direct (3, 5, R) clutch, SSB (Shift Solenoid B) applies varying solenoid pressure to the C35R clutch regulator and boost valves. As the C35R regulator valve moves, it supplies the direct (3, 5, R) clutch and C35R boost valve with regulated line pressure through the C35R circuit. The C35R boost valve directs the regulated line pressure to the opposite side of the C35R clutch regulator valve through the C35R FDBK circuit for gradual direct (3, 5, R) clutch engagement.
For additional hydraulic circuit and information, refer to Hydraulic Circuits Hydraulic Circuits.
Electrical Operation
Solenoid operation:
5th Gear TCC (Torque Converter Clutch) Released Solenoid Operation Chart
NC = Normally closed
NH = Normally high
NL = Normally low
6th Gear Torque Converter Clutch (TCC) Applied
Mechanical Operation
Apply components:
- O/D (Overdrive) (4, 5, 6) clutch
- Intermediate (2, 6) clutch
- TCC (Torque Converter Clutch)
Planetary Gearset Operation
Front planetary gearset driven components:
- Planetary carrier
Center planetary gearset driven components:
- Sun gear (does not contribute to power flow)
- Ring gear (does not contribute to power flow)
Rear planetary gearset driven components:
- Planetary carrier
- Ring gear
Front planetary gearset held components:
- None
Center planetary gearset held components:
- None
Rear planetary gearset held components:
- Sun gear
6th Gear TCC (Torque Converter Clutch) Applied Clutch Application Chart
For component information, refer to Mechanical Components and Functions Mechanical Components and Functions.
Power Flow
Hydraulic Operation
Line pressure hydraulic circuits:
- Line pressure from the pump is supplied to the manual valve.
- Line pressure is regulated by the pressure regulator valve.
- The pressure regulator valve is controlled by varying pressure from the LPC (Line Pressure Control) solenoid through the LPC (Line Pressure Control) circuit.
Torque converter circuits:
- Line pressure from the manual valve is directed to the multiplex shift valve through the DRIVE 1 hydraulic circuit.
- The multiplex shift valve directs DRIVE 1 pressure to the TCC (Torque Converter Clutch) regulator apply valve through the DRIVE 2 hydraulic circuit.
- When the TCC (Torque Converter Clutch) is applied, the TCC (Torque Converter Clutch) regulator apply valve directs regulated DRIVE 2 pressure to the TCC (Torque Converter Clutch) control valve through the REG APPLY hydraulic circuit. The TCC (Torque Converter Clutch) control valve directs DRIVE 2 pressure to the TCC APPLY hydraulic circuit to apply the TCC (Torque Converter Clutch) .
- Transmission fluid from the TCC APPLY circuit returns to the TCC (Torque Converter Clutch) control valve unpressurized through the TCC RELEASE circuit and returns to the sump through the EXH port.
Cooler and lubrication hydraulic circuits:
- Regulated line pressure from the pressure regulator valve is directed to the TCC (Torque Converter Clutch) control valve through the CONV FD hydraulic circuit.
- The TCC (Torque Converter Clutch) control valve directs transmission fluid from the CONV FD circuit to the COOLER FEED circuit.
- In the COOLER FEED circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit.
Solenoid hydraulic circuits:
- The LPC (Line Pressure Control) solenoid applies varying pressure to the pressure control valve through the LPC (Line Pressure Control) hydraulic circuit. The LPC (Line Pressure Control) solenoid regulates line pressure by controlling the position of the pressure regulator valve.
- SSC (Shift Solenoid C) applies pressure to the intermediate (2, 6) clutch regulator valve to apply the direct (2, 6) clutch.
- SSD (Shift Solenoid D) applies pressure to the low/reverse/overdrive (4, 5, 6) clutch regulator valve to apply the O/D (Overdrive) clutch.
- The TCC (Torque Converter Clutch) solenoid applies pressure to the TCC (Torque Converter Clutch) control valve and the TCC (Torque Converter Clutch) regulator apply valve to apply the TCC (Torque Converter Clutch) .
Clutch hydraulic circuits:
- Line pressure from the manual valve is directed to the multiplex shift valve through the DRIVE 1 hydraulic circuit.
- The multiplex shift valve directs DRIVE 1 pressure to the intermediate (2, 6) clutch regulator valve through the DRIVE 2 and CB26FD/CB1234FD hydraulic circuits.
- Line pressure from the pump is supplied to the low/reverse/overdrive (4, 5, 6) regulator valve.
- Regulated line pressure from the low/reverse/overdrive (4, 5, 6) regulator valve is sent to the multiplex shift valve assembly through the CBLR/C456 SUPPLY hydraulic circuit.
- The multiplex shift valve directs the CBLR/C456 SUPPLY transmission fluid to the multiplex manual valve through the C456 SUPPLY hydraulic circuit.
- The multiplex manual valve directs pressure from the C456 SUPPLY circuit to the O/D (Overdrive) (4, 5, 6) clutch through the C456 hydraulic circuit to apply the clutch.
- The C456 hydraulic circuit supplies pressure to latch the multiplex shift valve and also supplies pressure to the intermediate (2, 6) clutch regulator valve to boost the SSC SIG circuit.
- Regulated CB26FD/CB1234FD pressure from the intermediate (2, 6) clutch regulator valve is directed to the intermediate (2, 6) clutch through the CB26 hydraulic circuit to apply the clutch. The CB26 hydraulic circuit also supplies pressure to the opposite side of the CB26 clutch regulator valve for gradual intermediate (2, 6) clutch engagement.
For additional hydraulic circuit and information, refer to Hydraulic Circuits Hydraulic Circuits.
Electrical Operation
Solenoid operation:
6th Gear TCC (Torque Converter Clutch) Applied Solenoid Operation Chart
NC = Normally closed
NH = Normally high
NL = Normally low
Manual LOW Position and 1st Gear Below 8 km/h (5 mph)
NOTE: The transaxle operates differently in first gear above and below 8 km/h (5 mph). For transaxle operation above 8 km/h (5 mph), refer to 1st Gear Above 8 km/h (5 mph).
Mechanical Operation
Apply components:
- Forward (1, 2, 3, 4) clutch
- Low/reverse clutch
- Low one-way clutch
Planetary Gearset Operation
Front planetary gearset driven components:
- Ring gear
- Planetary carrier
Center planetary gearset driven components:
- Sun gear
- Planetary carrier
Rear planetary gearset driven components:
- None
Front planetary gearset held components:
- Sun gear
Center planetary gearset held components:
- Ring gear
Rear planetary gearset held components:
- Rear planetary carrier (does not contribute to power flow)
Manual LOW Position and 1st Gear Below 8 km/h (5 mph) Clutch Application Chart
For component information, refer to Mechanical Components and Functions Mechanical Components and Functions.
Power Flow
Hydraulic Operation
Line pressure hydraulic circuits:
- Line pressure from the pump is supplied to the manual valve.
- Line pressure is regulated by the pressure regulator valve.
- The pressure regulator valve is controlled by varying pressure from the LPC (Line Pressure Control) solenoid through the LPC (Line Pressure Control) circuit.
Torque converter circuits:
- Regulated line pressure from the pressure regulator valve is directed to the TCC (Torque Converter Clutch) control valve through the CONV FD hydraulic circuit.
- When the TCC (Torque Converter Clutch) is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC (Torque Converter Clutch) control valve. Pressure from the TCC RELEASE circuit releases the TCC (Torque Converter Clutch) .
- Transmission fluid from the TCC RELEASE returns to the TCC (Torque Converter Clutch) control valve through the TCC APPLY circuit.
Cooler and lubrication hydraulic circuits:
- The TCC (Torque Converter Clutch) control valve directs transmission fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC (Torque Converter Clutch) is released) to the COOLER FEED circuit.
- In the COOLER FEED circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit.
Solenoid hydraulic circuits:
- The LPC (Line Pressure Control) solenoid applies varying pressure to the pressure control valve through the LPC (Line Pressure Control) hydraulic circuit. The LPC (Line Pressure Control) solenoid regulates line pressure by controlling the position of the pressure regulator valve.
- SSA (Shift Solenoid A) applies pressure to the forward (1, 2, 3, 4) clutch regulator valve to apply the forward clutch.
- SSD (Shift Solenoid D) applies pressure to the low/reverse/overdrive (4, 5, 6) regulator valve to apply the low/reverse clutch.
- SSE (Shift Solenoid E) applies pressure to the multiplex shift valve to position the valve against the spring and direct regulated CBLR/C456 SUPPLY pressure to the low/reverse clutch.
Clutch hydraulic circuits:
- Line pressure from the manual valve is directed to the multiplex shift valve through the DRIVE 1 hydraulic circuit.
- The multiplex shift valve directs DRIVE 1 pressure to the multiplex manual valve through the REV DRIVE B circuit.
- The multiplex manual valve directs REV DRIVE B pressure to the DRIVE 2/DRIVE B shuttle ball where it enters the CB26FD/CB1234FD circuit.
- The CB26FD/CB1234FD circuit feeds the forward (1, 2, 3, 4) clutch through the CB1234 SUP circuit.
- To apply the forward (1, 2, 3, 4) clutch, SSA (Shift Solenoid A) supplies varying solenoid pressure to the CB1234 clutch regulator and boost valves. As the CB1234 clutch regulator valve moves, it supplies the forward (1, 2, 3, 4) clutch and CB1234 boost valve with regulated line pressure through the CB1234 circuit. The CB1234 boost valve directs the regulated line pressure to the opposite side of the regulator valve through the CB1234 FDBK circuit for gradual forward (1, 2, 3, 4) clutch engagement.
- Regulated line pressure from the low/reverse/overdrive (4, 5, 6) regulator valve is sent to the multiplex shift valve assembly through the CBLR/C456 SUPPLY hydraulic circuit.
- The multiplex shift valve directs the transmission fluid to the low/reverse clutch through the CBLR hydraulic circuit.
For additional hydraulic circuit and information, refer to Hydraulic Circuits Hydraulic Circuits.
Electrical Operation
Solenoid operation:
Manual LOW Position and 1st Gear Below 8 km/h (5 mph) Solenoid Operation Chart
NC = Normally closed
NH = Normally high
NL = Normally low
