Automatic Transaxle - Overhaul [CD4E]: Maintenance Mazda Tribute I

Transaxle Fluid Temperature (TFT) Sensor

The TFT sensor is located on the solenoid valve body. It is a temperature sensitive device called a thermistor. The resistance value of the TFT sensor will vary with temperature. The PCM monitors the voltage across the TFT sensor to determine the temperature of the transaxle fluid. The PCM uses this signal to determine shift scheduling and to control line pressure for cold and hot temperature operation. The PCM also inhibits torque converter clutch (TCC) operation at low transaxle temperature and adjusts electronic pressure control (EPC) pressures for temperature.

Fluid Pump

The pump provides the volume of fluid required to charge the torque converter, main control valve body, cooling system, lubrication system, and hydraulic apply devices. The transaxle uses a positive displacement gear and crescent-type pump which is shaft-driven by the torque converter.

Fluid Level and Filter

Fluid from the sump area (formed by the transaxle case and converter housing) flows through a filter to the pump. The filter has a recirculation port connected to the main control area of the case and receives fluid from the main regulator exhaust. This provides fluid under pressure to aid the pump in higher efficiency operation. A thermostatic fluid control valve prevents foaming of fluid by maintaining a sump level below the rotating components. The two-piece chain drive cover prevents foaming by not allowing the chain to rotate in the fluid. A magnet on the underside of the chain cover collects unwanted magnetic material.

TRANSAXLE FLUID COOLER - BACK FLUSHING AND CLEANING

Note. Rubber hoses must be attached to the ends of this fluid cooler tubes to connect them to the cleaner.

1. Connect the cleaner pressure and return lines appropriately. Connect the pressure line to the fluid cooler inlet tube. Connect the return line to the fluid cooler outlet tube. Place the outlet end of the return line in the solvent tank degas bottle. NOTE: Cycling the solvent pump on and off will help dislodge contaminants in the cooler system.
2. Switch the solvent pumps on. Allow the solvent to circulate a minimum of five minutes.
3. Switch the solvent pump off.
4. Disconnect the cleaner pressure line at the fluid cooler tube.
5. Using compressed air, blow through the fluid cooler inlet tube until all solvent is removed.
6. Remove the rubber hoses from the fluid cooler tubes.

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1. Disconnect the battery cables.
2. Remove the battery and tray.
3. Disconnect the breather tube and mass air flow (MAF) / intake air temperature (IAT) sensor.
4. Remove the intake tube and air cleaner cover.
5. Disconnect the transaxle wiring harness electrical connector, and TR sensor connector.
6. Disconnect the shift cable.
7. Remove the shift cable and bracket, and position out of the way.
8. Remove the vent tube hose.
9. Raise and support the vehicle.
10. Remove the LH front wheel.
11. Remove the splash shield. NOTE: Remove the bolts in the indicated sequence.
12. Remove the main control cover.
13. Remove the main control cover gasket. NOTE: Remove the bolts in the indicated sequence.
14. Remove the main control valve body bolts.
15. Lift the main control valve body while disconnecting the manual valve link.
16. Depress the retaining tabs and push the solenoid valve body electrical connector down through the transaxle case.
17. Make sure the manual valve control lever does not fall out of the main control valve body while removing from the vehicle.

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1. Install the manual control valve. NOTE: Inspect the solenoid valve body harness connector O-ring seal for damage. Install a new O-ring seal, if damaged, before installing the connector into the case.
2. Push the solenoid valve body harness connector into the case.
3. Connect the manual valve link to the main control valve body.
4. Install the main control valve body and tighten the bolts in sequence as indicated.
5. Loosen the nut on the ball stud for the manual valve detent lever actuating rod assembly.
6. Remove the manual control lever outer assembly bolt.
7. Using the special tool and pin, align the shifter shaft.
8. Move the manual valve detent lever assembly to the "D" position.
9. Tighten the nut on the ball and remove the special tool.
10. Tighten the detent nut. Rotate back to the "D" position and check the adjustment.
11. Using the special tool and pin, align the shifter shaft.
12. Install the manual control lever.
13. Install and rotate the manual valve detent lever assembly to the neutral position. Low 1 Low 2 Drive Neutral Reverse Park
14. Install a new gasket on the main control cover.
15. Install the main control cover, and tighten the bolts in sequence as shown.
16. Install the splash shield.
17. Install the LH front wheel.
18. Lower the vehicle.
19. Install the shift cable and bracket.
20. Connect the shift cable. NOTE: Before installing the vent tube hose, clean out any obstructions in the hose using low air pressure.
21. Install the vent tube hose, and clamp.
22. Connect the transaxle harness connector, and the TR sensor connector.
23. Install the intake tube and air cleaner cover.
24. Connect the breather tube and mass air flow (MAF) / intake air temperature (IAT) sensor. NOTE: Before installing the battery tray check the vent tube hose for any obstructions, kinks, or incorrect routing position.
25. Install the battery tray and battery.
26. Connect the battery cables.
27. Check the transaxle fluid, add fluid as necessary using MERCON(R) Automatic Transaxle Fluid (ATF).
28. Start the engine and move the transaxle range selector lever through all gear positions. Refill as necessary.

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1. Raise and support the vehicle.
2. Remove the LH front wheel.
3. Remove the splash shield.
4. Remove the output shaft speed (OSS) sensor. Disconnect the OSS sensor electrical connector. Remove the bolt. Inspect the OSS bore.
5. Inspect the O-ring seal for nicks or cuts. Install a new seal as necessary.