Automatic Transaxle/transmission - Aisin AW21: Specifications Ford Fusion I рестайлинг

GENERAL SPECIFICATIONS

GENERAL SPECIFICATIONS

GENERAL SPECIFICATIONS

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

a Refer to the procedure.

b When reinstalling fasteners originally coated with loctite, clean the fasteners with a wire brush prior to applying new threadlock. Apply threadlock and sealer to threads of the bolt.

Torque Demand

The torque demand downshift occurs (automatically) during part throttle acceleration when the demand for torque is greater than the engine can provide at that gear ratio. If applied, the transaxle will disengage the Torque Converter Clutch (TCC) to provide added acceleration.

Torque Converter Clutch (TCC)

Based on output rpm signals, signals from the engine control unit (engine rpm and throttle opening) and vehicle speed, a smooth engagement is carried out through linear control of the Torque Converter Clutch (TCC) solenoid. Also, the slip rate is detected by adding input rpm signals and slip control is carried out.

1. Engagement Control - control is carried out using a TCC solenoid. The TCC solenoid is linearly turned ON and OFF. The clutch inside the torque converter is operated and the pump impeller and turbine runner are connected. Through this, the engine and the transaxle are coupled and engine output is connected directly to the transaxle, eliminating transaxle loss and enhancing fuel economy
2. Slip Control - control is carried out using a TCC solenoid. The TCC solenoid is linearly turned ON and OFF and the clutch within the torque converter is operated outside of the engagement range. The clutch slides without being in a completely coupled condition, increasing transaxle efficiency and enhancing fuel economy.

Torque Converter

The torque converter transmits and multiplies torque by means of transmission fluid inside the torque converter. The torque converter is composed of the following

1. Converter case
2. Pump impeller assembly
3. Turbine assembly
4. Stator assembly/one-way clutch
5. Lock-up clutch

In addition, the use of the lock-up clutch is intended to improve fuel economy as a direct coupling between the engine and the transaxle.

The standard torque converter components operate as follows

1. Rotation of the converter housing and impeller sets the transmission fluid in motion.
2. The turbine reacts to the transmission fluid motion from the impeller, transferring rotation to the geartrain through the input shaft.
3. The reactor redirects transmission fluid going back into the impeller, providing for torque multiplication.
4. The clutch and damper assembly dampens powertrain torsional vibration and provides a direct mechanical connection for improved efficiency.
5. Power is transmitted from the torque converter to the planetary gearsets and other components through the input shaft.

Scheme 338

Torque Converter Diagnosis

Special Tools Illustration Tool Name Tool Number Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool

Prior to torque converter installation, all diagnostic procedures must be followed. This is to prevent the unnecessary installation of new or remanufactured torque converters. Only after a complete diagnostic evaluation can the decision be made to install a new or remanufactured torque converter.

Begin with the normal diagnostic procedures as follows

1. Preliminary Inspection
2. Know and Understand the Customer's Concern
3. Verify the Concern - carry out the torque converter operation test
4. Carry out Diagnostic Procedures: Run On-Board Diagnostics. Refer to «Diagnostics»(ref-291884-S24398016722008073000000) . Repair all non-transaxle related DTCs first. Repair all transaxle DTCs. Rerun On-Board Diagnostic to verify repair. Carry out Line Pressure Test. Refer to «Special Testing Procedures»(ref-291884-S17613753212008073000000) . Carry out Stall Speed Test. Refer to «Special Testing Procedures»(ref-291884-S17613753212008073000000) . Carry out diagnostic routines. Refer to «Diagnosis By Symptom»(ref-291884-S32448146262008073000000) . Use the index to locate the appropriate routine that best describes the symptom(s). The routine will list all possible components that may cause or contribute to the symptom. Check each component listed, diagnose and repair as required, before repairing the torque converter.

Torque Converter Operation Test

Note. The Torque Converter Clutch (TCC) will not engage if the Transmission Fluid Temperature (TFT) is below 0°C (32°F).

1. Using the scan tool, make sure that the TFT is within specification 43°C-47°C (109°F-117°F).
2. Accelerate the vehicle to 35-60 km/h (22-37 mph) and maintain a consistent speed.
3. Release the accelerator pedal to close the throttle and press the accelerator to partially open the throttle while monitoring the scan tool engine speed and TCCAMP_MES. The PID will read 0 when the Torque Converter Clutch (TCC) is released, and 1 when the TCC is applied. The engine speed will increase when the TCC is released and decrease when the TCC is applied.
4. If these actions do not occur, see torque converter operation concerns, refer to «Diagnosis By Symptom»(ref-291884-S32448146262008073000000) .

Transmission Fluid Leakage in Torque Converter Area

Leakage at the front of transmission, as evidenced by transmission fluid around the torque converter housing part of the case, may have several sources. By careful observation it is possible, in many instances, to pinpoint the source of a leak before removing the transmission from the vehicle. The paths which the transmission fluid takes to reach the bottom of the torque converter housing are shown in the illustration. The 5 numbers in the illustration correspond with the 5 flow path steps.

Scheme 339

1. A new or remanufactured torque converter must be installed if one or more of the following statements are true: A torque converter malfunction has been determined based on complete diagnostic procedures. Converter stud(s), impeller hub or bushing are damaged. Discoloration of the torque converter (due to overheating). The torque converter is found to be out of specification when carrying out one of the following torque converter checks: One-Way Clutch Check End Play Check Stator to Turbine Interference Check Stator to Impeller Interference Check Torque Converter Leak Check Evidence of transmission assembly or fluid contamination due to the following transmission or converter failure modes: Major Metallic Failure Multiple Clutches or Clutch Plate Failures Sufficient Component Wear which results in Metallic Contamination

Torque Converter Contamination Inspection

Material

1. If a new or remanufactured torque converter is not being installed, the following procedures must be carried out: The torque converter must be thoroughly cleaned. Torque converters with drain plugs can be cleaned by using a suitable torque converter/fluid cooler cleaner. Torque converters without drain plugs can be cleaned by hand. Partially fill the torque converter using only recommended transmission fluid for the applicable transmission. Hand agitate the torque converter and then thoroughly drain the transmission fluid. Refill the torque converter with new transmission fluid specified for transmission and reinstall.

Torque Converter Hub Seal

Special Tools Illustration Tool Name Tool Number Converter Seal Installer 307-548 Remover, Input Shaft Oil Seal 308-375 Slide Hammer 307-005 (T59L100-B)

Scheme 340

Material

Material

See also:
• JACKING AND LIFTING