Automatic Transaxle - Tribute Except Hybrid: Overview Mazda Tribute II

TRANSAXLE DESCRIPTION

The automatic transaxle is a 6-speed transaxle with electronic shift control. It is designed for operation in a transverse powertrain for front wheel drive (FWD) and all wheel drive (AWD) vehicles.

This transaxle has a 4-element torque converter design, which includes a torque converter clutch (TCC) and a geartrain with 3 planetary gearsets.

The hydraulic control system of this transaxle uses 7 electronically controlled solenoids for

Scheme 34

1. Shift feel (through line pressure control and shift pressure control)
2. Shift scheduling and timing
3. TCC operation

IDENTIFICATION TAGS

When servicing the automatic transaxle, see the identification tag located on the case.

When servicing the automatic transaxle, use the transaxle identification tag located on top of the transaxle case.

Scheme 35

The solenoid body strategy is a file that is programmed into the powertrain control module (PCM) to control the shift, line pressure control (LPC) and torque converter clutch (TCC) solenoids to prevent harsh shifts. The solenoid body tag on the transaxle case contains the thirteen-digit solenoid body strategy and the seven-digit solenoid body identification.

Scheme 36

Scheme 37

Any time a new solenoid body is installed, a new solenoid body strategy file is downloaded into the solenoid using the scan tool. A replacement solenoid body tag is supplied with the new solenoid body which contains the thirteen-digit solenoid body strategy and the seven-digit solenoid body identification. The new tag is placed over the original solenoid body tag.

Scheme 38

If the solenoid body strategy stamped on the solenoid body leadframe does not match the solenoid body tag, a new solenoid body must be installed or harsh shifts will result.

Scheme 39

The solenoids are calibrated from the factory and are not all the same. When solenoids are replaced, the new solenoid band number must match the old solenoid band number. The band number is the last digit of the number stamped on the side of the solenoid and will be a 1, 2, 3, 4 or 5.

Scheme 40

Electronic System Description

The PCM and its input/output network controls the following operations

1. Shift timing
2. Line pressure (shift feel)

The transaxle control is separate from the engine control strategy in the PCM, although some of the input signals are shared. When determining the best operating strategy for transaxle operation, the PCM uses input information from certain engine-related and driver-demand related sensors and switches.

In addition, the PCM receives input signals from certain transaxle-related sensors and switches. The PCM also uses these signals when determining transaxle operating strategy.

Using all of these input signals, the PCM can determine when the time and conditions are right for a shift, or when to apply or release the torque converter clutch (TCC). It will also determine the best line pressure needed to optimize shift engagement feel. To accomplish this, the PCM uses output solenoids to control transaxle operation.

The following provides a brief description of each of the sensors and actuators used to control transaxle operation.

Electronic Operation

The PCM controls the operation of the transaxle with the following solenoids

1. Line pressure control (LPC) solenoid
2. Shift solenoid A (SSA)
3. Shift solenoid B (SSB)
4. Shift solenoid C (SSC)
5. Shift solenoid D (SSD)
6. Shift solenoid E (SSE)
7. Torque converter clutch (TCC)

For solenoid information, see TRANSAXLE ELECTRONIC CONTROL SYSTEM .

Scheme 41

Mechanical Operation

1. Park pawl engaged, holding the final drive assembly stationary
2. Low/reverse clutch applied

Planetary Gearset Operation

1. Front planetary gearset driven components
2. None

Center planetary gearset driven component

1. Sun gear

Rear planetary gearset driven component

1. None

Front planetary gearset held component

1. Planetary carrier assembly (splined to final drive assembly, held stationary by park pawl)

Center planetary gearset held component

1. Center ring gear (splined to rear planetary carrier)

Rear planetary gearset held components

1. Planetary carrier
2. Rear ring gear (splined to front carrier)

Hydraulic Operation

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit.
2. When the TCC is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC control valve. Pressure from the TCC RELEASE circuit releases the TCC.
3. Fluid from the TCC RELEASE returns to the TCC control valve through the TCC APPLY circuit.

Cooler and lubrication hydraulic circuits

1. The TCC control valve directs fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC is released) to the COOLER FD circuit.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSD applies pressure to the low reverse/456 regulator and latch valves to apply the low/reverse clutch.
3. SSE applies pressure to the clutch control bypass valve to position the valve to direct regulated line pressure in the CBR1/C456 circuit to the low/reverse clutch.

Clutch hydraulic circuits

1. Line pressure from the pump is supplied to the low reverse/456 regulator valve. To apply the low/reverse clutch, SSD supplies varying solenoid pressure to the low reverse/456 regulator and latch valves. As the low reverse/456 regulator valve moves, it supplies the clutch control bypass valve and low reverse/456 latch valve with regulated line pressure through the CBR1/C456 circuit. The latch valve directs the regulated line pressure to the opposite side of the regulator valve through the CBR1/C456 FDBK circuit for gradual low/reverse clutch engagement.
2. Regulated line pressure at the clutch control bypass valve in the CBR1/C456 circuit is directed to the low/reverse clutch through the CBR1 circuit to apply the clutch.

For hydraulic circuit information, see HYDRAULIC CIRCUITS .

Park Position Solenoid Operation Chart

PARK POSITION SOLENOID OPERATION CHART

Scheme 42

Scheme 43

Apply components

1. Low/reverse clutch applied
2. Direct (3, 5, R) clutch applied

Front planetary gearset driven components

1. Planetary carrier

Center planetary gearset driven components

1. Sun gear (does not contribute to power flow)

Rear planetary gearset driven components

1. Sun gear

Front planetary gearset held components

1. None

Center planetary gearset held components

1. Center ring (does not contribute to power flow)

Rear planetary gearset held components

1. Planetary carrier

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit.
2. When the TCC is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC control valve. Pressure from the TCC RELEASE circuit releases the TCC.
3. Fluid from the TCC RELEASE returns to the TCC control valve through the TCC APPLY circuit.

Cooler and lubrication hydraulic circuits

1. The TCC control valve directs fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC is released) to the COOLER FD circuit.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSB applies pressure to the 35R regulator and latch valves to apply the direct (3, 5, R) clutch.
3. SSD applies pressure to the low reverse/456 regulator valve to apply the low/reverse clutch.
4. SSE applies pressure to the clutch control bypass valve to position the valve to direct regulated line pressure in the CBR1/C456 circuit to the CBR1 circuit to apply the low/reverse clutch.

Clutch hydraulic circuits

1. Line pressure supplied to the manual valve is directed to the clutch control bypass valve through the REVERSE circuit.
2. The clutch control bypass valve directs the REVERSE circuit to the 35R regulator valve through the C35R FD circuit, DRIVE 2/C35R FD shuttle ball and DRIVE 2/C35R FD circuit. To apply the direct (3, 5, R) clutch, SSB applies varying solenoid pressure to the 35R regulator and latch valves. As the 35R regulator valve moves, it supplies the direct (3, 5, R) clutch and 35R latch valve with regulated line pressure through the C35R circuit. The 35R latch valve directs the regulated line pressure to the opposite side of the 35R regulator valve through the C35R FDBK circuit for gradual direct (3, 5, R) clutch engagement.
3. Line pressure from the pump is supplied to the low reverse/456 regulator valve. To apply the low/reverse clutch, SSD supplies varying solenoid pressure to the low reverse/456 regulator and latch valves. As the regulator valve moves, it supplies the clutch control bypass valve and low reverse/456 latch valve with regulated line pressure through the CBR1/C456 circuit. The low reverse/456 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the CBR1/C456 FDBK circuit for gradual low/reverse clutch engagement.
4. Regulated line pressure at the clutch control bypass valve in the CBR1/C456 circuit is directed to the low/reverse clutch through the CBR1 circuit to apply the clutch.

For hydraulic circuit information, see HYDRAULIC CIRCUITS .

Reverse Position Solenoid Operation Chart

REVERSE POSITION SOLENOID OPERATION CHART

Scheme 44

Scheme 45

Apply components

1. Low/reverse clutch applied

Front planetary gearset driven components

1. None

Center planetary gearset driven components

1. Sun gear

Rear planetary gearset driven components

1. None

Front planetary gearset held components

1. None

Center planetary gearset driven components

1. Sun gear

Rear planetary gearset driven components

1. None

Front planetary gearset held components

1. None

Center planetary gearset held components

1. Ring gear

Rear planetary gearset held components

1. Planetary carrier

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit.
2. When the TCC is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC control valve. Pressure from the TCC RELEASE circuit releases the TCC.
3. Fluid from the TCC RELEASE returns to the TCC control valve through the TCC APPLY circuit.

Cooler and lubrication hydraulic circuits

1. The TCC control valve directs fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC is released) to the COOLER FD circuit.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSD applies pressure to the low reverse/456 regulator and latch valves to apply the low/reverse clutch.
3. SSE applies pressure to the clutch control bypass valve to position the valve to direct regulated line pressure in the CBR1/C456 circuit to the low/reverse clutch.

Clutch hydraulic circuits

1. Line pressure from the pump is supplied to the low reverse/456 regulator valve. To apply the low/reverse clutch, SSD supplies varying solenoid pressure to the low reverse/456 regulator and latch valves. As the regulator valve moves, it supplies the clutch control bypass valve and low reverse/456 latch valve with regulated line pressure through the CBR1/C456 circuit. The low reverse/456 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the CBR1/C456 FDBK circuit for gradual low/reverse clutch engagement.
2. Regulated line pressure at the clutch control bypass valve in the CBR1/C456 circuit is directed to the low/reverse clutch through the CBR1 circuit to apply the clutch.

For additional hydraulic circuit information, see HYDRAULIC CIRCUITS .

REVERSE POSITION SOLENOID OPERATION CHART

Scheme 46

Scheme 47

Note. The transaxle operates differently in 1st gear above and below 6 km/h (4 mph). For transaxle operation below 6 km/h (4 mph), refer to MANUAL LOW POSITION AND 1ST GEAR BELOW 6 KM/H (4 MPH) in this section.

Apply components

1. Forward (1, 2, 3, 4) clutch

Front planetary gearset driven components

1. Ring gear
2. Planetary carrier

Center planetary gearset driven components

1. Sun gear
2. Planetary carrier

Rear planetary gearset driven components

1. Ring gear

Front planetary gearset driven components

1. Sun gear

Center planetary gearset held components

1. Ring gear

Rear planetary gearset held components

1. Rear planetary carrier (does not contribute to power flow)

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit.
2. When the TCC is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC control valve. Pressure from the TCC RELEASE circuit releases the TCC.
3. Fluid from the TCC RELEASE returns to the TCC valve through the TCC APPLY circuit.

Cooler and lubrication hydraulic circuits

1. The TCC control valve directs fluid from the TCC APPLY circuit (return circuit from the torque converter when the is released) to the COOLER FD circuit.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSA applies pressure to the 1234 regulator and latch valves to apply the forward (1, 2, 3, 4) clutch.
3. SSD applies pressure to the 1234 regulator and latch valves to apply the forward (1, 2, 3, 4) clutch.
4. SSD releases pressure to the low reserve/456 regulator and latch valves to release the low/reverse clutch.
5. SSE releases pressure to the clutch control bypass valve to position it so that regulated line pressure supplied in the CBR1/C456 circuit for 4th, 5th and 6th gear will apply the overdrive (4, 5, 6) clutch.

Clutch hydraulic circuits

1. SSD removes pressure from the low reverse/456 regulator and latch valves which positions the valves to block line pressure and release the low/reverse clutch. Solenoid pressure from SSE is removed from the clutch control bypass valve to position it to apply the overdrive (4, 5, 6) clutch.
2. Line pressure is supplied to the 1234 regulator valve by the manual valve in the DRIVE and LOW position. To apply the forward (1, 2, 3, 4) clutch, SSA supplies varying solenoid pressure to the 1234 regulator and latch valves. As the 1234 regulator valve moves, it supplies the forward (1, 2, 3, 4) clutch and 1234 latch valve with regulated line pressure through the C1234 circuit. The 1234 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the C1234 FDBK circuit for gradual forward (1, 2, 3, 4) clutch engagement.

1st Gear Above 6 km/h (4 mph) Solenoid Operation Chart

1ST GEAR ABOVE 6 KM/H (4 MPH) SOLENOID OPERATION CHART

Scheme 48

Scheme 49

Apply components

1. Forward (1, 2, 3, 4) clutch
2. Intermediate (2, 6) clutch

Front planetary gearset driven components

1. Planetary carrier
2. Ring gear

Center planetary gearset driven components

1. Sun gear
2. Planetary carrier
3. Ring gear

Rear planetary gearset driven components

1. Ring gear

Front planetary gearset held components

1. Sun gear

Center planetary gearset held components

1. None

Rear planetary gearset held components

1. Sun gear

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit.
2. When the TCC is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC control valve. Pressure from the TCC RELEASE circuit releases the TCC.
3. Fluid from the TCC RELEASE returns to the TCC control valve through the TCC APPLY circuit.

Cooler and lubrication hydraulic circuits

1. The TCC control valve directs fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC is released) to the COOLER FD circuit.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSA applies pressure to the 1234 regulator and latch valves to apply the forward (1, 2, 3, 4) clutch.
3. SSC applies pressure to the 26 regulator and latch valves to apply the intermediate (2,6) clutch.

Clutch hydraulic circuits

1. Line pressure is supplied to the 1234 regulator valve by the manual valve in the DRIVE and LOW position. To apply the forward (1, 2, 3, 4) SSA supplies varying solenoid pressure to the 1234 regulator and latch valves. As the regulator valve moves, it supplies the forward (1, 2, 3, 4) clutch and 1234 latch valve with regulated line pressure through the C1234 circuit. The 1234 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the C1234 FDBK circuit for gradual forward (1, 2, 3, 4) clutch engagement.
2. Line pressure is supplied to the 26 regulator valve by the manual valve in the DRIVE and LOW positions. To apply the intermediate (2, 6) SSC supplies varying solenoid pressure to the 26 regulator and latch valves. As the 26 regulator valve moves, it supplies the intermediate (2, 6) clutch and 26 latch valve with regulated line pressure through the CB26 circuit. The 26 latch valve directs the regulated line pressure to the opposite side of the 26 regulator valve through the CB26 FDBK circuit for gradual intermediate (2, 6) clutch engagement.

For hydraulic circuit information, see HYDRAULIC CIRCUITS .

2nd Gear Solenoid Operation Chart

2ND GEAR SOLENOID OPERATION CHART

Scheme 50

Apply components

1. Forward (1, 2, 3, 4) clutch
2. Direct (3, 5, R) clutch

Front planetary gearset driven components

1. Planetary carrier
2. Ring gear

Center planetary gearset driven components

1. Sun gear
2. Planetary carrier
3. Ring gear

Rear planetary gearset driven components

1. Sun gear
2. Planetary carrier
3. Ring gear

Front planetary gearset held components

1. Sun gear

Center planetary gearset held components

1. None

Rear planetary gearset held components

1. None

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit.
2. When the TCC is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC control valve. Pressure from the TCC RELEASE circuit releases the TCC.
3. Fluid from the TCC RELEASE returns to the TCC control valve through the TCC APPLY circuit.

Cooler and lubrication hydraulic circuits

1. The TCC control valve directs fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC is released) to the COOLER FD circuit.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSA applies pressure to the 1234 regulator and latch valves to apply the forward (1, 2, 3, 4) clutch.
3. SSC applies pressure to the 26 regulator and latch valves to release the intermediate (2,6) clutch.
4. SSB applies pressure to the 35R regulator and latch valves to apply the direct (3, 5, R) clutch.

Clutch hydraulic circuits

1. Line pressure is supplied to the 1234 regulator valve by the manual valve in the DRIVE and LOW position. To apply the forward (1, 2, 3, 4) SSA supplies varying solenoid pressure to the 1234 regulator and latch valves. As the regulator valve moves, it supplies the forward (1, 2, 3, 4) clutch and 1234 latch valve with regulated line pressure through the C1234 circuit. The 1234 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the C1234 FDBK circuit for gradual forward (1, 2, 3, 4) clutch engagement.
2. Solenoid pressure from SSC is removed from the 26 regulator and latch valves which positions the valves to block line pressure and release the intermediate (2, 6) clutch.
3. Line pressure from the pump is directed to the clutch control bypass valve by the manual valve through the DRIVE hydraulic circuit. The clutch control bypass valve directs the pressure to the 35R regulator valve through the TCC regulator valve, DRIVE 2 circuit, DRIVE 2/C35R FD shuttle ball and DRIVE 2/C35R FD circuit. SSB applies varying solenoid pressure to the 35R regulator and latch valves. As the regulator valve moves, it supplies the direct (3, 5, R) clutch and 35R latch valve with regulated line pressure through the C35R circuit. The 35R latch valve directs the regulated line pressure to the opposite side of the 35R regulator valve through the C35R FDBK circuit for gradual direct (3, 5, R) clutch engagement.

For hydraulic circuit information, see HYDRAULIC CIRCUITS .

3rd Gear Solenoid Operation Chart

3RD GEAR SOLENOID OPERATION CHART

Scheme 51

Apply components

1. Forward (1, 2, 3, 4) clutch
2. O/D (4,5,6) clutch

Front planetary gearset driven components

1. Planetary carrier
2. Ring gear

Center planetary gearset driven components

1. Sun gear
2. Planetary carrier
3. Ring gear

Rear planetary gearset driven components

1. Planetary carrier

Front planetary gearset held components

1. Sun gear

Center planetary gearset held components

1. None

Rear planetary gearset held components

1. None

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit.
2. When the TCC is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC control valve. Pressure from the TCC RELEASE circuit releases the TCC.
3. Fluid from the TCC RELEASE returns to the TCC control valve through the TCC APPLY circuit.

Cooler and lubrication hydraulic circuits

1. The TCC control valve directs fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC is released) to the COOLER FD circuit.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSA applies pressure to the 1234 regulator and latch valves to apply the forward (1, 2, 3, 4) clutch.
3. SSB applies pressure to the low reverse/456 regulator and latch valves to apply the (4,5,6) clutch.
4. SSD applies pressure to the low reverse/456 regulator and latch valves to apply the O/D (4, 5, 6) clutch.

Clutch hydraulic circuits

1. Line pressure is supplied to the 1234 regulator valve by the manual valve in the DRIVE and LOW position. To apply the forward (1, 2, 3, 4) SSA supplies varying solenoid pressure to the 1234 regulator and latch valves. As the regulator valve moves, it supplies the forward (1, 2, 3, 4) clutch and 1234 latch valve with regulated line pressure through the C1234 circuit. The 1234 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the C1234 FDBK circuit for gradual forward (1, 2, 3, 4) clutch engagement.
2. Solenoid pressure from SSCB is removed from the 35R regulator and latch valves which positions the valves to block line pressure and release the direct (3, 5, R) clutch.
3. Line pressure from the pump is supplied to the low reverse/456 regulator valve. SSD supplies varying solenoid pressure to the low reverse/456 regulator and latch valves. As the regulator valve moves, it supplies the clutch control bypass valve and low reverse/456 latch valve with regulated line pressure through the CBR1/C456 circuit. The low reverse/456 latch valve directs the regulated line pressure to the opposite side of the low reverse/456 regulator valve through the CBR1/C456 FDBK circuit for gradual clutch engagement.
4. Regulated line pressure at the clutch control bypass valve in the CBR1/C456 circuit is directed to the O/D (4, 5, 6) clutch through the C456 circuit to apply the clutch.
5. Regulated line pressure in the C456 also supplies the latch pressure for the clutch control bypass valve.

For hydraulic circuit information, see HYDRAULIC CIRCUITS .

4th Gear Solenoid Operation Chart

4TH GEAR SOLENOID OPERATION CHART

Scheme 52

Apply components

1. O/D (4,5,6) clutch
2. Direct (3, 5, R) clutch

Front planetary gearset driven components

1. Planetary carrier
2. Ring gear

Center planetary gearset driven components

1. Sun gear (does not contribute to power flow)
2. Planetary carrier

Rear planetary gearset driven components

1. Sun gear
2. Planetary carrier

Front planetary gearset held components

1. None

Center planetary gearset held components

1. None

Rear planetary gearset held components

1. None

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit.
2. When the TCC is released, CONV FD pressure is directed to the TCC RELEASE circuit by the TCC control valve. Pressure from the TCC RELEASE circuit releases the TCC.
3. Fluid from the TCC RELEASE returns to the TCC control valve through the TCC APPLY circuit.

Cooler and lubrication hydraulic circuits

1. The TCC control valve directs fluid from the TCC APPLY circuit (return circuit from the torque converter when the TCC is released) to the COOLER FD circuit.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSD applies pressure to the low reverse/456 regulator and latch valves to apply the O/D (4, 5, 6) clutch-.SSA releases pressure to the 1234 regulator and latch valves to release the forward (1, 2, 3, 4) clutch-.SSB applies pressure to the 35R regulator and latch valves to apply the direct (3, 5, R) clutch.

Clutch hydraulic circuits

1. Line pressure from the pump is supplied to the low reverse/456 regulator valve. SSD supplies varying solenoid pressure to the low reverse/456 regulator and latch valves. As the regulator valve moves, it supplies the clutch control bypass valve and low reverse/456 latch valve with regulated line pressure through the CBR1/C456 circuit. The low reverse/456 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the CBR1/C456 FDBK circuit for gradual clutch engagement.
2. Regulated line pressure at the clutch control bypass valve in the CBR1/C456 circuit is directed to the OD (4, 5, 6) clutch through the C456 circuit to apply the clutch.
3. Regulated line pressure in the C456 also supplies the latch pressure for the clutch control bypass valve.
4. Solenoid pressure from SSA is removed from the 1234 regulator and latch valves which positions the valves to block line pressure and release the forward (1, 2, 3, 4) clutch.
5. Line pressure from the pump is directed to the clutch control bypass valve by the manual valve through the DRIVE hydraulic circuit. The clutch control bypass valve directs the pressure to the 35R regulator valve through the TCC regulator valve, DRIVE 2 circuit, DRIVE 2/C35R FD shuttle ball and DRIVE 2/C35R FD circuit. SSB applies varying solenoid pressure to the 35R regulator and latch valves. As the regulator valve moves, it supplies the direct (3, 5, R) clutch and 35R latch valve with regulated line pressure through the C35R circuit. The 35R latch valve directs the regulated line pressure to the opposite side of the 35R regulator valve through the C35R FDBK circuit for gradual direct (3, 5, R) clutch engagement.

For hydraulic circuit information, see HYDRAULIC CIRCUITS .

5th Gear Solenoid Operation Chart

5TH GEAR SOLENOID OPERATION CHART

Scheme 53

Scheme 54

Apply components

1. Intermediate (2, 6) clutch
2. TCC

Front planetary gearset driven components

1. Planetary carrier

Center planetary gearset driven components

1. Sun gear (does not contribute to power flow)

Rear planetary gearset driven components

1. Planetary carrier
2. Ring gear

Front planetary gearset held components

1. None

Center planetary gearset held components

1. None

Rear planetary gearset held components

1. Sun gear

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Torque converter circuits

1. When the torque converter is applied, line pressure from the manual valve is directed to the TCC regulator valve by the clutch control bypass valve through the DRIVE 2 circuit. The TCC solenoid supplies varying solenoid pressure to the TCC regulator valve and the TCC control valve to position the valves to apply the TCC
2. As the TCC regulator valve moves, it supplies the TCC control valve with regulated line pressure through the REG APPLY circuit. The TCC control valve directs the REG APPLY circuit to the TCC APPLY circuit to apply the TCC control valve directs the REG APPLY circuit to the TCC APPLY circuit to apply the TCC.
3. Pressure from the torque converter returns to the control valve through the TCC RELEASE circuit.

Cooler and lubrication hydraulic circuits

1. Regulated line pressure from the main pressure regulator valve is directed to the TCC control valve through the CONV FD hydraulic circuit. When the TCC is applied, CONV FD pressure supplies the COOLER FD circuit which circulates through the transmission fluid cooler or the thermal bypass valve.
2. In the COOLER FD circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit in the input shaft to supply lubrication to the transaxle.

Solenoid hydraulic circuits

1. The LPC solenoid applies varying pressure to the main pressure regulator valve through the VBS LINE hydraulic circuit. The LPC solenoid regulates line pressure by controlling the position of the main pressure regulator valve.
2. SSD applies pressure to the low reverse/456 regulator and latch valves to apply the O/D (4, 5, 6) clutch-.SSB applies pressure to the 35R regulator and latch valves to apply the direct (3, 5, R) clutch.
3. SSC applies pressure to the 26 regulator and latch valves to apply the direct (2, 6) clutch.
4. The TCC solenoid applies pressure to the TCC control valve and the TCC regulator valve to apply the TCC.

Clutch hydraulic circuits

1. Line pressure from the pump is supplied to the low reverse/456 regulator valve. SSD supplies varying solenoid pressure to the low reverse/456 regulator and latch valves. As the regulator valve moves, it supplies the clutch control bypass valve and low reverse/456 latch valve with regulated line pressure through the CBR1/C456 circuit. The low reverse/456 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the CBR1/C456 FDBK circuit for gradual clutch engagement.
2. Regulated line pressure at the clutch control bypass valve in the CBR1/C456 circuit is directed to the OD (4, 5, 6) clutch through the C456 circuit to apply the clutch.
3. Regulated line pressure in the C456 also supplies the latch pressure for the clutch control bypass valve.
4. Solenoid pressure from SSB is removed from the 35R regulator and latch valves which positions the valves to block line pressure and release the direct (3, 5, R) clutch.
5. Line pressure is supplied to the 26 regulator valve by the manual valve in the DRIVE and LOW positions. To apply the intermediate (2, 6) clutch, SSC supplies varying solenoid pressure to the 26 regulator and latch valves. As the regulator valve moves, it supplies the intermediate (2, 6) clutch and 26 latch valve with regulated line pressure through the CB26 circuit. The 26 latch valve directs the regulated line pressure to the opposite side of the regulator valve through the CB26 FDBK circuit for gradual intermediate (2, 6) clutch engagement.

For hydraulic circuit information, see HYDRAULIC CIRCUITS .

6th Gear Solenoid Operation Chart

6TH GEAR SOLENOID OPERATION CHART

Scheme 55

Note. The transaxle operates differently in first gear above and below 6 km/h (4 mph). For transaxle operation above 6 km/h (4 mph), refer to 1ST GEAR ABOVE 6 KM/H (4 MPH) in this section.

Apply components

1. Forward (1, 2, 3, 4) clutch
2. Low/reverse clutch
3. Low OWC

Front planetary gearset driven components

1. Ring gear
2. Planetary carrier

Center planetary gearset driven components

1. Sun gear
2. Planetary carrier

Rear planetary gearset driven components

1. None

Front planetary gearset held components

1. Sun gear

Center planetary gearset held components

1. Ring gear

Rear planetary gearset held components

1. Rear planetary carrier (does not contribute to power flow)

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit.

Manual LOW Position and 1st Gear Above 6 km/h (4 mph) Solenoid Operation Chart

MANUAL LOW POSITION AND 1ST GEAR ABOVE 6 KM/H (4 MPH) SOLENOID OPERATION CHART

Scheme 56

Scheme 57

When the transaxle has an electrical, hydraulic or mechanical failure, the PCM removes ground (control) from the shift, TCC and LPC solenoids. The uncontrolled solenoids default to their normal states. SSB, SSD and the LPC solenoid are normally high solenoids which means in their normal state, they provide high pressure to the valves they control. This provides only 5th gear with maximum line pressure.

Apply components

1. O/D (4,5, 5) clutch
2. Low/reverse clutch

Front planetary gearset driven components

1. Planetary carrier

Center planetary gearset driven components

1. Sun gear (does not contribute to power flow)

Rear planetary gearset driven components

1. Sun gear
2. Planetary carrier

Front planetary gearset held components

1. None

Center planetary gearset held components

1. None

Rear planetary gearset held components

1. None

Line pressure hydraulic circuits

1. Line pressure from the pump is supplied to the main pressure regulator valve, low reverse/456 regulator valve, manual valve, solenoid regulator valve and control pressure regulator.
2. Line pressure is controlled by the position of the main pressure regulator valve.
3. The position of the main pressure regulator valve is controlled by varying pressure from the LPC solenoid through the VBS LINE circuit. In 5th gear fail-safe, full solenoid pressure is supplied by the LPC solenoid to the main pressure regulator valve for maximum line pressure.

5th Gear Failsafe Solenoid Operation Chart

5TH GEAR FAILSAFE SOLENOID OPERATION CHART

Scheme 58

Scheme 59

Note. Transaxle fluid cooler backflushing will be carried out using the heated cooler line flusher. Follow the manufacturer's instructions included with the machine. Test the equipment to make sure that a vigorous fluid flow is present before proceeding.

1. Check and top off fluid level of the heated cooler line flusher tank with transaxle fluid.
2. Allow the fluid in the heated cooler line flusher 15-30 minutes to heat up to 60°C (140°F) before using
3. Install the line adapters into the transmission cooler lines.
4. Attach the heated cooler line flusher red line to the transaxle fluid cooler pressure line quick disconnect fitting. NOTE: The TOP transaxle cooler tube on the transaxle is the pressure line.
5. Attach the heated cooler line flusher blue line to the transaxle fluid cooler return line quick disconnect fitting.
6. Follow the equipment instructions to purge the cooler lines and cooler prior to starting the flushing procedure.
7. Allow the cooling system to backflush for 10-15 minutes, then flush the cooler in a normal flow direction for an additional 10-15 minutes.
8. Clean the transaxle mounted fluid cooler tubes by hand.