MATERIAL SPECIFICATIONS TABLE
| Item | Specification | Fill Capacity |
|---|---|---|
| Dye-Lite® ATF/Power Steering Fluid Leak Detection Dye 164-R3701 (Rotunda) | ||
| Motorcraft® Premium Automatic Transmission Fluid XT-8-QAW (US); CXT-8-LAW12 (Canada) | WSS-M2C924-A | 7.0L (7.4 qt) |
| Multi-Purpose Grease XG-4 and/or XL-5 | ESB-M1C93-B | |
| Threadlock and Sealer TA-25 | WSK-M2G351-A5 | |
| Ultra Silicone Sealant TA-29 |
MATERIAL SPECIFICATIONS TABLE
GENERAL SPECIFICATIONS TABLE
| Item | Specification |
|---|---|
| Fluid | |
| NOTE: The use of any transmission fluid other than what is recommended for this transaxle will cause transaxle damage. Refer to Owner's Literature to determine the correct service interval for the specific vehicle. | |
| NOTE: Do not use water-based cleaners to clean or flush the transmission fluid cooler tubes or transaxle damage will occur. Use only clean transmission fluid designated for this transaxle. | |
| NOTE |
|---|
| The use of any transmission fluid other than what is recommended for this transaxle will cause transaxle damage. Refer to Owner's Literature to determine the correct service interval for the specific vehicle. |
| NOTE |
|---|
| Do not use water-based cleaners to clean or flush the transmission fluid cooler tubes or transaxle damage will occur. Use only clean transmission fluid designated for this transaxle. |
GENERAL SPECIFICATIONS TABLE
| Item | Specification |
|---|---|
| Torque Converter End Play | |
| New or rebuilt | 0.355-1.04 mm (0.013-0.04 in) |
| Used | 0.355-1.87 mm (0.013-0.073 in) |
| Transmission Fluid Filter | |
| Internal to the transmission | |
GENERAL SPECIFICATIONS TABLE
TORQUE SPECIFICATIONS TABLE
| Description | Nm | Lb-ft | Lb-in |
|---|---|---|---|
| Ground strap bolts | 12 | 106 | |
| Main control valve body bolts (1) | |||
| Manual control lever nut | 12 | 106 | |
| Selector lever cable bracket bolts | 12 | 106 | |
| Selector lever cable bracket nut | 12 | 106 | |
| Torque converter nuts | 36 | 27 | |
| Transaxle insulator-to-frame bolts (2) | 62 | 46 | |
| Transaxle support insulator bracket bolt | 80 | 59 | |
| Transaxle support insulator bracket nuts | 90 | 66 | |
| Transaxle support insulator bracket through bolt | 150 | 111 | |
| Transaxle-to-engine bolts | 48 | 35 | |
| Transmission Control Module (TCM) | 24 | 18 | |
| Transmission fluid cooler tubes | 10 | 89 | |
| Transmission fluid drain plug | 47 | 35 | |
| Transmission fluid fill plug | 39 | 29 | |
| Transmission fluid pan bolts | 13 | 115 | |
| Transmission Fluid Temperature (TFT) sensor | 10 | 89 | |
| (1) Refer to the appropriate procedure(s). (2) When reinstalling fasteners originally coated with threadlock, clean the fasteners with a wire brush prior to applying new threadlock. Apply threadlock and sealer to threads of the bolt. | |||
| (1) | Refer to the appropriate procedure(s). |
| (2) | When reinstalling fasteners originally coated with threadlock, clean the fasteners with a wire brush prior to applying new threadlock. Apply threadlock and sealer to threads of the bolt. |
TORQUE SPECIFICATIONS TABLE
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.
- 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
- 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
- Converter case
- Pump impeller assembly
- Turbine assembly
- Stator assembly/One-Way Clutch (OWC)
- 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
- Rotation of the converter housing and impeller sets the transmission fluid in motion.
- The turbine reacts to the transmission fluid motion from the impeller, transferring rotation to the geartrain through the input shaft.
- The reactor redirects transmission fluid going back into the impeller, providing for torque multiplication.
- The clutch and damper assembly dampens powertrain torsional vibration and provides a direct mechanical connection for improved efficiency.
- Power is transmitted from the torque converter to the planetary gearsets and other components through the input shaft.
Scheme 1
| Item | Description |
|---|---|
| 1 | Converter clutch and damper (part of 7902) |
| 2 | Reactor (part of 7902) |
| 3 | Turbine (part of 7902) |
| 4 | Impeller (part of 7902) |
| 5 | Transmission fluid motion |
| 6 | Transmission input rotation |
| 7 | Input shaft |
| 8 | Engine rotation |
ITEM DESCRIPTION TABLE
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).
- Using the scan tool, make sure that the TFT is within specification 43°C-47°C (109°F-117°F).
- Accelerate the vehicle to 35-60 km/h (22-37 mph) and maintain a consistent speed.
- 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 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.
- If these actions do not occur, see Torque Converter Operations Concerns, refer to «DIAGNOSIS BY SYMPTOM».
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 2
| Leak Path | Symptom | Possible Source |
|---|---|---|
| 1, 2 and 4 | Leak at front of transmission | Torque converter hub seal |
| 1, 2 and 4 | Leak at front of transmission | Vent |
| 1, 2 and 4 | Leak at front of transmission | Converter hub weld |
| 1, 2 and 4 | Leak at front of transmission | External pump seal (large) |
| 1, 2 and 4 | Leak at front of transmission | Pump to case screws |
| 1, 2 and 4 | Leak at front of transmission | Pump gasket |
| 3 | Leak at front of transmission | Torque converter seal weld |
| 3 | Leak at front of transmission | Torque converter stud |
| 5 | Leak at front of transmission | Engine oil leak; rear main seal |
| 5 | Leak at front of transmission | Engine valve cover |
| 5 | Leak at front of transmission | Oil galley |
| 5 | Leak at front of transmission | Pump lip seal |
| 5 | Leak at front of transmission | Engine Oil Pressure (EOP) sensor |
SYMPTOM TABLE
Torque Converter Clutch Operations Concerns: Does Not Apply
| Possible Component | Reference/Action |
|---|---|
| 240 - ROUTINE | |
| Torque Converter Does Not Apply | |
| Damaged or malfunctioning solenoid | Carry out pinpoint test. Refer to «PINPOINT TESTS - OSC EQUIPPED VEHICLE». Install a new main control valve body. Refer to «Installation». |
| Damaged or disconnected wire harness | Inspect wire harness. Check connections to the Torque Converter Clutch (TCC) solenoid. Install a new torque converter. Refer to «Torque Converter». |
| Damaged or malfunctioning torque converter | |
DIAGNOSTIC ROUTINES REFERENCE - TORQUE CONVERTER CLUTCH OPERATIONS CONCERNS
Torque Converter Clutch Operations Concerns: Cycling/Shutter/Chatters
| Possible Component | Reference/Action |
|---|---|
| 242 - ROUTINE | |
| Torque Converter Cycling, Shudders or Chatters | |
| Damaged or malfunctioning Torque Converter Clutch (TCC) solenoid | Install a new main control valve body. Refer to «Installation». |
| Damaged or disconnected wire harness | Inspect wire harness. Check connections to the TCC solenoid. Install a new torque converter. Refer to «Torque Converter». |
| Damaged or malfunctioning torque converter | |
DIAGNOSTIC ROUTINES REFERENCE - TORQUE CONVERTER CLUTCH OPERATIONS CONCERNS
See also:
• JACKING & LIFTING