Automatic Transmission - 6R60: Specifications Ford Explorer IV

GENERAL SPECIFICATIONS

GENERAL SPECIFICATIONS

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

a Specific tightening sequence required. See the appropriate procedures.

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.

Torque Converter

The torque converter is a 3-element unit containing a 3-plate clutch. The clutch can be controlled and engaged in any gear 2 to 6. Calibration parameters may be set to allow lockup in a higher gear only. The clutch is applied by removing fluid pressure from one side of the plate. The torque converter transmits and multiplies torque. The torque converter includes the following 3 elements

1. Impeller assembly
2. Turbine assembly
3. Reactor assembly

The standard torque converter components operate as follows

1. Rotation of the converter housing and impeller set the fluid in motion.
2. The turbine reacts to the fluid motion from the impeller, transferring rotation to the geartrain through the input shaft.
3. The reactor redirects fluid going back into the impeller, allowing for torque multiplication.
4. Power is transmitted from the torque converter to the planetary gear sets and other components through the input shaft.

Torque Converter Clutch

The torque converter clutch is a device that reduces slip in the torque converter and, therefore, helps to keep fuel consumption to a minimum.

The torque converter clutch is engaged and released by the control system.

Pressure at the torque converter clutch piston is determined by an electronic pressure control valve.

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 good torque converters. Only after a complete diagnostic evaluation can the decision be made to install a new torque converter.

Begin with the normal diagnostic procedures as follows

1. Preliminary inspection.
2. Know and understand the customer's concern.
3. Verify the condition - carry out the torque converter operation test.
4. Carry out diagnostic procedures. Carry out on-board diagnostics. Refer to «Diagnostics»(ref-270910-S35399860762007110700000) . Repair all non-transmission related DTCs first. Repair all transmission-related DTCs. Rerun on-board diagnostics to verify repair. Carry out Stall Speed Test. Refer to «Special Testing Procedures»(ref-270910-S00313625662007110700000) . Carry out Diagnostic Routines. Refer to «Diagnosis By Symptom»(ref-270910-S16511254362007110700000) . Use the Diagnosis by Symptom 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 changing the torque converter.

Torque Converter Operation Test

The Torque Converter Operation Test verifies that the torque converter clutch (TCC) control system and the torque converter are operating correctly.

1. Carry out Quick Test with scan tool. Refer to the «Introduction - Gasoline Engines»(ref-268480) . Check for DTCs.
2. Connect a scan tool to the vehicle.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in D position.
4. After normal operating temperature is reached, maintain a constant speed of about 56 km/h (35 mph) in 5th gear for 10 seconds.
5. Release the accelerator pedal and monitor the scan tool TP voltage to approximately 1.25 volts or 30% throttle.
6. Monitor the TCC and engine speed PID. The TCC should release and engine rpms should increase before the 5-4 shift occurs. NOTE: The following is a list of common vehicle concerns that have been misdiagnosed as TCC shudder. For diagnosis of the following items, refer to the appropriate sections of the workshop manual and the «Introduction - Gasoline Engines»(ref-268480) . Spark plugs - check for cracks, high resistance or broken insulators Plug wires Fuel injector - filter may be plugged Fuel contamination - engine driveability concerns EGR valve - valve may let in too much exhaust gas and cause engine to run lean Vacuum leak - engine will not get correct air/fuel mixture Manifold absolute pressure (MAP)/mass air flow (MAF) sensor - incorrect air/fuel mixture Heated oxygen sensor (HO2S) - too rich/lean air/fuel mixture Fuel pressure - may be too low Engine mounts - loose/damaged mounts can cause vibration concerns Axle joints - check for vibration

Fluid Leakage in Torque Converter Area

Leakage at the front of the transmission, as evidenced by 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 the leak before removing the transmission from the vehicle. The paths which the fluid takes to reach the bottom of the torque converter housing are shown in the illustration. The 6 numbers in the illustration correspond with the 6 flow path steps.

Scheme 1

1. A new or remanufactured torque converter must be installed if one or more of the following statements is true: A torque converter malfunction has been determined based on complete diagnostic procedures. Converter rivets, impeller hub or bushing are damaged. Discoloration (due to overheating). 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. Internal torque converter contamination present. For additional information, refer to «Torque Converter Contamination Inspection»(ref-270910-S25040782152007110700000) .

Torque Converter Contamination Inspection

Material

1. If a new or remanufactured torque converter is not being installed, the following steps must be completed.
2. With the torque converter on a bench, pour a small amount of transmission fluid from the torque converter onto an absorbent white tissue or through a paper filter and examine the fluid.
3. Observe the color and odor of the fluid. The fluid should be red, not brown or black. Odor may indicate an overheating condition such as clutch disc or band failure.
4. Examine the stain on the tissue for evidence of particles (specks of any kind). Examine the transmission fluid level indicator for signs of antifreeze (gum or varnish). If particles are present in the transmission fluid, a new torque converter must be installed.
5. If there are no particles or contamination present, drain the remainder of the transmission fluid from the torque converter.
6. Add 1.9L (2 qt) of clean transmission fluid into the converter and agitate by hand.
7. Thoroughly drain the transmission fluid.