A 2006-07 GM vehicle equipped with a 4T65E transmission may store any of the following codes:
- P0742 “TCC Stuck On”;
- P2761 “TCC Pressure Control Solenoid Circuit Open”;
- P2764 “TCC Pressure Control Solenoid Circuit Low.”
The transmission internal wire harness was routed incorrectly so that the Tan TCC solenoid wire was positioned within the internal harness retaining clip. This would result in the metal clip either chafing through the wire insulation creating a grounded circuit or to sever the wire completely creating an open circuit (Figure 1).
Position the TCC solenoid and the new internal wire harness Tan TCC solenoid wire away from the internal harness metal retaining clip (Figure 2).
Internal Wire Harness Part Number: 24229643
After overhaul, Chrysler and Dodge vehicles equipped with the 62TE may exhibit gear-ratio error in third gear, P0733, then a neutral condition when coming to a stop. Clearing the code or recycling the ignition would get the same condition to happen again during the 2-3 upshift.
The cause may be that during overhaul the 2-4 piston retainer was swapped with that of a 41TE. Refer to Figure 4 and see that these piston retainers are identical in every way but the feed hole location. If the 41TE piston retainer is used on a 62TE, there will be no feed to the 2-4 clutch, which will also cause the neutral condition when it goes into limp mode. See the component application chart in Figure 3 and note the information at the bottom of the chart indicating that 3rd gear is failsafe.
To correct this condition use the 62TE 2-4 piston retainer.
A Ford truck equipped with a 6R140W transmission may come into the shop with a complaint of a transmission fluid leak. Upon inspection it appears as if the transmission is leaking out the front.
Based on these findings the transmission is removed and the pump is removed and resealed. Because the pan gasket is the reusable type it is reinstalled. When the transmission is installed back into the vehicle and filled with fluid, the leak reappears from the same area.
The “reusable” pan gasket is causing the leak. The illustration in Figure 5 shows that the rubber coating on the pan gasket has eroded away.
Because the two front pan bolt holes are drilled through into the bell housing area and when the fluid is at the full level, this area is submerged allowing the fluid to leak around the threaded bolt holes and into the bell housing area as shown in Figure 6.
Replace the pan gasket using the part number under “Service Information.”
Molded Rubber Pan Gasket: 6L2Z-7A191-BA
At the start of production for the 2007 model year the Chevrolet Equinox has had the transmission control module relocated to the top of the transmission (Figure 7).
Less wiring and connectors, which results in fewer wire- and connector-related electrical faults.
- All external transmission electrical component wiring has been eliminated.
- The transmission range sensor is now part of the TCM.
- The case has been changed to accommodate a newly designed 22-pin case connector that the TCM will plug directly into.
Interchangeability: There is no interchangeability with the previous designed components mentioned above.
The X1 TCM 16-pin connector can be serviced with available terminal ends (Figure 8).
The X2 TCM 4-pin connector is not serviceable; it is only replaceable (Figure 9).
The X3 TCM 22-pin connector (case connector) is not serviceable; it is only replaceable (Figure 10).
August 2017 Issue
Volume 34, No. 8
- GM 4T65E: TCC solenoid circuit codes stored
- Chrysler 62TE: P0733 third gear ratio/neutral condition
- Ford 6R140W: Transmission fluid leak
- GM AF23/33-5 (AW55-50SN): TCM relocation