Hello and welcome to Just Answer. My name is James.
I would recommend testing the shift solenoid and replacing it if necessary first, then clear the trouble codes, see if the trans will operate properly at that point and then address the speed sensor code if it returns. The speed sensor issue cannot cause the vehicle not to move, but could cause shift timing, or speedometer problems.
Shift solenoid C is the same as SS3, you are correct there. If you have an ohmmeter, the resistance of the solenoid should be 22-48 ohms. If you find otherwise, replace the solenoid. Here is a diagram of the internal transmission harness, should you need to verify continuity through it.
|Pin Number ||Circuit ||Circuit Function|
|1 ||Black ||TCC Power|
|2 ||Red ||Turbine Shaft Speed Sensor Signal|
|3 ||White ||Sensor Signal Return (TSS-)|
|4 ||Red ||Transmission Fluid Temperature Sensor|
|5 ||Purple ||Torque Converter Clutch Solenoid|
|6 ||— ||NOT USED|
|7 ||Yellow ||Shift Solenoid No. 3|
|8 ||Red ||Sensor Signal Return (TFT-)|
|9 ||Orange ||Coast Clutch Solenoid|
|10 ||White ||Shift Solenoid Power|
|11 ||Green ||EPC Power|
|12 ||Blue ||Electronic Pressure Control Solenoid|
|13 ||— ||NOT USED|
|14 ||Brown ||Shift Solenoid No. 2|
|15 ||— ||NOT USED|
|16 ||Gray ||Shift Solenoid No. 1|
Here is the location of the solenoids in the valve body. With the fluid pan removed, simply locate shift solenoid C, and unbolt the bracket that holds it on. To replace, lubricate the solenoid seal with some trans fluid, push it into the valve body firmly and carefully, then install the bracket and torque the bolts to 89 lb/in
|Item ||Part Number ||Description |
|1 ||7F037 ||Torque Converter Clutch Solenoid Assembly |
|2 ||7G484 ||Coast Clutch Solenoid Assembly |
|3 ||7G484 ||Shift Solenoid 2 Assembly |
|4 ||7H144 ||EPC Solenoid Assembly |
|5 ||7G484 ||Shift Solenoid 1 Assembly |
|6 ||7G484 ||Shift Solenoid 3 Assembly |
CAUTION: SS3 may pop out of its bore. This may damage the solenoid.
Use a 10mm socket to remove the SS1 and SS3 solenoid clamp screws. Remove the solenoid clamp and the solenoids.