John Deere 000735.05 – Transmission Control Unit (EPC or PTP): Reverse Clutch Solenoid Amps Are Low Main Control Module

The transmission control unit has detected low amperage in the Direct Drive Reverse Clutch Solenoid (also known as the Clutch C2 Solenoid) circuit. The .05 suffix indicates that the electrical current is below the normal operating range, which suggests an open circuit, a high-resistance connection, or a faulty solenoid coil. This fault may affect the proper operation of the Range Module Direct Drive (PTD).

• 8130
• 8230
• 8230T
• 8330
• 8330T
• 8430
• 8430T
• 8530
• 6930 Premium
• 5085E
• 5090E
• 5100E

1. 1

   Visually inspect the wiring harness leading to the reverse clutch solenoid for any signs of damage, chafing, corrosion, or loose connections. Ensure the connector at the solenoid is clean and securely seated.

2. 2

   With the tractor's key on (engine not running), check for 12 volts at the solenoid's electrical connector when reverse is commanded to verify the control module is sending power.

3. 3

   Disconnect the solenoid and use a multimeter set to Ohms to measure the resistance across the solenoid's terminals. A typical reading is 5 to 30 ohms (or 40 ± 5 ohms depending on the model). Infinite resistance indicates an open circuit or broken coil.

1. 1

   Ensure Safety

   Park the tractor on a level surface, engage the park brake, and turn off the engine. Disconnect the battery before starting any electrical work.

2. 2

   Locate the Solenoid

   The reverse clutch solenoid (Y36) is located on the transmission housing. On PowrQuad transmissions, the forward and reverse solenoids are often found on the front of the transmission.

3. 3

   Perform Diagnostic Checks

   Conduct the voltage and resistance tests as described above to confirm if the solenoid is faulty or if the issue lies in the wiring.

4. 4

   Replace the Solenoid

   If the solenoid is confirmed to be faulty, it must be replaced. Be aware that removing the solenoid may result in some transmission fluid loss. Disconnect the electrical connector, carefully unscrew and remove the solenoid from the transmission valve body. Install the new solenoid, ensuring any seals or O-rings are correctly in place. Torque the new solenoid to the manufacturer's specification (over-torquing can damage the valve), and reconnect the electrical connector.

5. 5

   Final Steps

   Reconnect the battery and check the transmission oil level, topping up as necessary. Start the tractor and test the operation of the reverse gear. Clear any stored fault codes using a diagnostic tool or through the tractor's onboard display.