P2764 on 2019-2022 Ram ProMaster: TCC Solenoid and Torque Converter Guide

What's Unique About the 2019-2022 Ram PROMASTER

On the Ram ProMaster with the 62TE transmission (2019-2021 models), code P2764 is a well-documented issue. Manufacturer Technical Service Bulletins (TSBs) directly state that while the code points to the TCC solenoid circuit, the root cause is often a failing torque converter. This is a critical distinction, as mechanics might otherwise replace only the solenoid, failing to fix the underlying and more severe problem. The 62TE transmission, originally designed for minivans, is known to be a weak point when used in the heavier ProMaster cargo vans, leading to premature failures of components like the torque converter. For the 2022 model year, the ProMaster switched to a completely different 9-speed automatic transmission, making this specific guidance inapplicable.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light is on.
• Vehicle jerking or slipping, especially during acceleration.
• Shuddering or vibrations, particularly when accelerating from a stop.
• Engine stalling when coming to a stop because the torque converter fails to unlock.
• Harsh or delayed gear shifts.
• Transmission may enter 'limp mode', getting stuck in one gear (e.g., 2nd or 3rd) and limiting vehicle speed.
• Decreased fuel economy due to the TCC not locking up.
• Engine RPMs are higher than usual at cruising speeds.
🎬 Watch: 9 common symptoms of a failing torque converter

Most Likely Causes

1. Torque Converter Failure 🔴 High Probability Manufacturer TSBs #9004206 and #9003453 explicitly state that if the TCC solenoid is functioning correctly, this code indicates torque converter failure on 62TE-equipped vehicles. The transmission is considered by some to be under-specified for the heavy-duty use of a ProMaster van, leading to increased stress and heat.
   How to confirm: A technician will first test the TCC solenoid's operation and wiring. If no faults are found there, and symptoms like slipping, shuddering, or stalling at stops are present, the torque converter is condemned per the TSBs.
   Typical fix: Replace the torque converter. This requires removing the transmission from the vehicle. 🎬 Watch this step-by-step guide to removing the 62TE transmission The transmission fluid and filter should also be replaced at the same time.
   Est. part cost: $300-$600
2. Faulty Torque Converter Clutch (TCC) Solenoid 🟡 Medium Probability The solenoid is an electronic component within the transmission that can fail over time due to heat and wear. It is often part of the main solenoid pack/block. A recall campaign (V46) was issued for some 2016-2017 ProMaster models for solenoid packs with terminals built out of specification, causing intermittent electrical connections.
   How to confirm: A technician can command the solenoid on and off with a diagnostic scan tool and check for proper voltage and resistance at the solenoid's connector. A failed solenoid will often show an open or shorted circuit (e.g., 0 ohms resistance).
   Typical fix: Replace the TCC solenoid or the entire solenoid pack. This is done by dropping the transmission pan. 🎬 See how to replace the solenoid pack on a ProMaster
   Est. part cost: $150-$300
3. Wiring or Connector Issues ⚪ Low Probability The wiring harness to the transmission can become damaged, corroded, or shorted, causing a low voltage signal. Corrosion or broken pins in the harness can increase resistance and trigger the code.
   How to confirm: Visually inspect the wiring harness leading to the transmission. Perform a continuity and voltage drop test on the TCC solenoid circuit from the TCM to the transmission connector.
   Typical fix: Repair or replace the damaged section of the wiring harness or the connector itself.
   Est. part cost: $20-$100

Rare But Worth Checking

• Faulty Transmission Control Module (TCM): While rare, the TCM itself can fail, causing it to send an incorrect signal or falsely report a circuit low condition. This should only be considered after all other possibilities, including the torque converter, have been ruled out.
• Low or Contaminated Transmission Fluid: Very low or dirty fluid can cause erratic solenoid operation, overheating, and shifting problems. A clogged transmission filter can starve the pump for fluid, causing a loss of line pressure and triggering various codes. This is a simple and important first check.

Diagnosis Steps

1. Check the transmission fluid level and condition. Ensure it is full and not burnt or contaminated. Use only the specified ATF+4 fluid.
2. Connect a professional scan tool to read the codes and view live data for the TCC solenoid operation and transmission slip speed.
3. Follow the guidance in TSB #9004206 and #9003453: Test the TCC solenoid's electrical circuit for opens, shorts to ground, or shorts to voltage. Check the solenoid's resistance to see if it is within specification (a good solenoid should have resistance, not 0 ohms).
4. If the solenoid and its circuit test correctly, the TSBs indicate the problem is a failed torque converter.
5. Inspect the transmission wiring harness and connectors for any visible damage, corrosion, or loose connections.
6. If the torque converter is replaced, the transmission fluid and filter must also be replaced, and it is recommended to perform a transmission Quick Learn procedure with a scan tool.
7. If a new solenoid pack is installed, a transmission Quick Learn procedure may also be required to ensure proper shift quality.

Parts You'll Likely Need

• Torque Converter (OEM #RL070538AB) — Per manufacturer TSBs, this is the most likely cause of the code if the TCC solenoid itself tests good.
  Trusted brands: Mopar, ATP, Transtar, Roadmaster
  OEM price range: $400-$600
  Aftermarket price range: $250-$500
• Transmission Solenoid Pack (including TCC Solenoid) (OEM #68371508AB (supersedes 5169313AA, 5078709AB, 68376696AA)) — This is the second most likely cause, where the solenoid itself has failed electrically or mechanically. It is often replaced as a complete pack.
  Trusted brands: Mopar, Sonnax, Rostra, Dorman (Remanufactured)
  OEM price range: $250-$400
  Aftermarket price range: $150-$300
• Mopar ATF+4 Transmission Fluid (OEM #68218057AC) — A fluid and filter change is required when replacing internal transmission components. Using the correct fluid type is critical for the 62TE transmission's health.
  Trusted brands: Mopar
  OEM price range: $10-$15 per quart

Related Codes That Often Appear With This One

• P0740 — This code also relates to the Torque Converter Clutch Circuit. The official Ram TSBs (#9004206, #9003453) list P2764 and P0740 together as indicators of potential torque converter failure.
• P0868 — This code indicates low transmission fluid pressure. It can be triggered by a failing torque converter, a clogged filter, or low fluid level, all of which are related to the P2764 diagnostic path.

Technical Service Bulletins (TSBs) & Recalls

• 9004206: Notes that if a vehicle with a 62TE transmission is jerking/slipping with code P2764 or P0740 and the TCC solenoid is ok, the torque converter has failed and must be replaced.
• 9003453: Contains the same diagnostic guidance as TSB 9004206 regarding codes P2764/P0740 pointing towards torque converter failure.
• ATRA Technical Bulletin #1648: Describes the symptom of the engine dying when put into Drive as a result of the TCC being stuck on, which can trigger P2764.

Platform-Specific Known Issues

• TSB #9004206 and #9003453 for the 62TE transmission explicitly link codes P2764 and P0740 to torque converter failure if the TCC solenoid is operating correctly.
• Customer Satisfaction Notification V46 was issued for some 2016-2017 ProMaster models due to solenoid packs with out-of-spec terminals causing intermittent electrical faults.
• The 62TE transmission is shared with many lighter-duty vehicles, and its application in the heavy ProMaster is a common point of discussion for reliability issues among owners and mechanics.

Mechanic-Grade Diagnostic Values

• TCC (EMCC) Solenoid Resistance — expected: Approximately 1.6 - 1.8 Ohms at 70°F. Failure: A reading of 0 ohms (short), infinity (open), or a significantly higher reading (e.g., over 4 ohms) indicates a faulty solenoid coil.
• Line Pressure (VFS) Solenoid Resistance — expected: Approximately 4.9 - 5.2 Ohms at 70°F. Failure: A reading significantly outside this range suggests a problem with the line pressure solenoid, which is part of the solenoid pack.
• TCC Solenoid Circuit Voltage — expected: Approximately 12V (+/- 0.5V) at the connector with key on, engine off.. Failure: Voltage below 9V indicates a low voltage condition in the harness or from the TCM/PCM.
• Transmission Fluid Level (62TE) — expected: 36 mm on a dipstick when fluid temperature is 165°F (74°C). Max level is 48 mm at 180°F (82°C).. Failure: Level is below the specified mark for a given temperature, indicating low fluid.

Scan Tool Commands That Help

• wiTECH or capable aftermarket tool (e.g., AlfaOBD): Quick Learn — This procedure is required after replacing the transmission, solenoid pack, or valve body, or after reprogramming the PCM/TCM. It resets and relearns the clutch adaptive values to ensure proper shift quality.
• Professional Bidirectional Scan Tool: TCC Solenoid Actuation Test — To functionally test the solenoid. The technician commands the solenoid on and off while monitoring voltage and pressure data to see if it responds correctly, helping to isolate a bad solenoid from a wiring issue.

Wiring & Ground Locations

• Transmission Main Connector Pin 3 — On the main 23-way electrical connector that plugs into the front of the 62TE transmission.. This is the specific pin for the TCC VFS (Variable Force Solenoid) control circuit. Technicians test for voltage and continuity at this pin to diagnose the circuit for P2764.
• Transmission Main Connector Pin 10 — On the main 23-way electrical connector for the 62TE transmission.. This pin supplies the 12V power from the transmission control relay to the solenoid pack. It is the positive side for resistance testing several solenoids, including the TCC solenoid.
• Chassis Ground Point — ProMaster owners often report weak grounds. A common factory grounding point is on the frame underneath the under-hood fuse box on the driver's side. Some owners add a supplementary ground wire from the starter motor bolt or engine block to this point.. A poor ground can cause a variety of intermittent and difficult-to-diagnose electrical faults, including low voltage conditions that could trigger a P2764 code.

OEM Part Supersession History

• 5078709AA, 5078709AB, 68371508AA, 68376696AA → 68371508AB — Part has been revised and updated by the manufacturer over several iterations to improve reliability.
  Heads up: Always use the latest part number (68371508AB) when replacing the solenoid pack to ensure you have the most current revision.

Model Year Variations Within This Range

• 2022: The 2022 Ram ProMaster uses a 9-speed automatic transmission (ZF 948TE), not the 6-speed 62TE. All diagnostic information, TSBs, and parts related to the 62TE are not applicable to the 2022 model year. The 9-speed has its own separate TCM.
• 2019-2021: Starting in 2019, the 62TE transmission was revised with a larger parking pawl and other internal updates. A complete transmission assembly from a pre-2019 model is not directly compatible with a 2019-2021 vehicle.