P2764 on 2014-2021 Ram ProMaster: TCC Solenoid & Torque Converter Guide

What's Unique About the 2014-2021 Ram ProMaster 1500, 2500, 3500

The Ram ProMaster uses the 62TE automatic transmission, which is also found in many Dodge and Chrysler minivans. For this transmission, Ram issued a Technical Service Bulletin (TSB #9004009) that provides a very specific diagnostic path for code P2764. The bulletin states that if the TCC solenoid tests okay, the code is a definitive sign of torque converter failure. This is a widely acknowledged issue, as the 62TE transmission, originally designed for lighter vehicles, is considered a weak point in the heavier ProMaster van, leading to premature torque converter and other component failures.

Diagnostic Flowchart

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

Symptoms You May Notice

• Vehicle jerking or slipping during acceleration.
• Engine stalling or dying when coming to a stop.
• Transmission slipping or failing to shift properly, sometimes feeling like it's hunting for gears.
• Shuddering or vibrations, sometimes described as driving over a rumble strip.
• Decreased fuel economy.
• Transmission overheating.
• Transmission may enter "limp mode," locking it into a single gear (often 2nd or 3rd).
• Engine RPMs are higher than usual at cruising speeds.
• Harsh or delayed gear shifts.

Most Likely Causes

1. Failed Torque Converter 🔴 High Probability A manufacturer TSB (#9004009) for the 62TE transmission explicitly states that if the TCC solenoid is functioning correctly, this code indicates torque converter failure. The transmission is known to be a weak point in this heavier vehicle application, and the torque converter lining is a common failure point.
   How to confirm: After confirming the TCC solenoid and its circuit are functioning correctly via electronic testing (scan tool actuation, resistance check), the torque converter is diagnosed as the failure point per TSB guidance. Physical confirmation requires transmission removal.
   Typical fix: Replace the torque converter. This is a major repair that involves removing the transmission from the vehicle. Many specialists recommend using an upgraded torque converter with a billet cover to prevent future failures.
   Est. part cost: $220-$800
2. Failed Torque Converter Clutch (TCC) Solenoid 🔴 High Probability The solenoid pack in the 62TE transmission is a known failure point due to wear and tear and contamination from degraded transmission fluid. The TCC solenoid is part of this pack and can fail individually or as part of a pack-wide failure.
   How to confirm: A technician can use a professional scan tool to command the solenoid on and off. The solenoid's electrical resistance can also be tested with a multimeter at the transmission connector. A reading that is out of specification indicates failure. ATRA Bulletin #1648 notes that if the engine stalls in Drive but not Reverse, the TCC solenoid may be mechanically stuck on.
   Typical fix: Replace the TCC solenoid, which is part of the larger solenoid pack/block. This is replaced as a single unit. This is located inside the transmission and is accessed by removing the oil pan.
   Est. part cost: $150-$400
3. Low or Contaminated Transmission Fluid 🟡 Medium Probability Dirty or low fluid can cause overheating, pressure loss, and erratic solenoid operation, leading to various fault codes. The 62TE transmission is sensitive to fluid type and condition, and fluid breakdown is accelerated by the heavy loads of the ProMaster.
   How to confirm: Check the transmission fluid level and condition. The ProMaster does not have a traditional dipstick, so a special tool is required to check the level via the capped dipstick tube. The fluid should be at the correct level, red in color, and not have a burnt smell.
   Typical fix: Perform a transmission fluid and filter change using the correct Mopar ATF+4 fluid. If the fluid is heavily contaminated with metal shavings, it often indicates a more severe internal failure like the torque converter.
   Est. part cost: $50-$150
4. Wiring or Connector Issues ⚪ Low Probability
   How to confirm: Visually inspect the wiring harness leading to the transmission for any signs of damage, corrosion, or loose connections, particularly at the main connector on the front of the transmission. Perform a continuity and voltage drop test on the TCC solenoid circuit from the TCM to the transmission connector.
   Typical fix: Repair the damaged section of the wiring harness or replace the faulty connector.
   Est. part cost: $20-$100

Rare But Worth Checking

• Faulty Transmission Control Module (TCM): This is very rare and should only be considered after all other possibilities, including the wiring, solenoid, and torque converter, have been definitively ruled out.

Diagnosis Steps

1. Check the transmission fluid level and condition using the appropriate dipstick tool. Ensure it is full and not burnt or contaminated.
2. Scan the TCM for all stored trouble codes. Note if P0740, P0700, or P0868 are present with P2764.
3. Inspect the transmission wiring harness and connectors for any visible damage, corrosion, or loose pins.
4. Using a bi-directional scan tool, command the TCC solenoid on and off to check for an audible click and response from the solenoid pack.
5. Test the resistance of the TCC solenoid circuit at the transmission connector. Compare the reading to the manufacturer's specification.
6. If the solenoid and wiring test good, follow the guidance of TSB #9004009, which indicates a failed torque converter.
7. If the torque converter is replaced, it is also best practice to replace the solenoid pack and transmission filter to prevent future issues and remove any contamination from the system.

Parts You'll Likely Need

• Torque Converter (OEM #68289064AD) — A manufacturer TSB points to this as the most likely cause if the solenoid and wiring are confirmed to be good. It is a very common failure on the 62TE transmission in this vehicle.
  Trusted brands: Mopar, LuK, Valeo, DACCO, Jasper (Remanufactured with upgrades)
  OEM price range: $250-$400
  Aftermarket price range: $200-$350
• Transmission Solenoid Pack (OEM #68376696AA) — This contains the TCC solenoid. It is the most common electrical component to fail for this code, though the torque converter is a more frequent root cause on this platform.
  Trusted brands: Mopar, Rostra, Dorman
  OEM price range: $250-$400
  Aftermarket price range: $150-$250
• Mopar ATF+4 Automatic Transmission Fluid (OEM #68218057AC) — This specific fluid is required for any service on the 62TE transmission. Using the wrong fluid type can cause damage. A full service can require 6-9 quarts.
  Trusted brands: Mopar, Valvoline, Castrol
  OEM price range: $10-$15 per quart
  Aftermarket price range: $8-$12 per quart
• Transmission Filter (OEM #5078555AA) — Should be replaced any time the transmission pan is removed. A clogged filter can cause fluid starvation and numerous pressure-related codes.
  Trusted brands: Mopar, Wix, ATP
  OEM price range: $20-$40
  Aftermarket price range: $10-$25

Related Codes That Often Appear With This One

• P0740 — This code for 'Torque Converter Clutch Circuit Malfunction' is a more general TCC fault and is often triggered alongside P2764, as noted in TSB #9004009.
• P0700 — This is a generic code indicating that the Transmission Control Module (TCM) has stored a fault. It acts as a 'check engine light' for the transmission, pointing the technician to more specific codes like P2764.
• P0868 — This code for 'Transmission Fluid Pressure Low' can appear if the underlying issue is a failing pump, clogged filter, or major leak, which can also trigger solenoid circuit codes due to low hydraulic pressure.

Technical Service Bulletins (TSBs) & Recalls

• 9004009: Addresses jerking/slipping with codes P0740 or P2764, pointing to torque converter failure if the solenoid tests okay.
• ATRA #1648: Describes engine stalling in Drive as a symptom of a mechanically stuck TCC solenoid.

Platform-Specific Known Issues

• TSB #9004009 states: 'If vehicle is jerking/slipping with MIL code(s) P0740 or P2764, check TCC Solenoid operation. If TCC Solenoid is ok, the codes are indicative of a torque converter failure. Replace the torque converter.'

Mechanic-Grade Diagnostic Values

• TCC (EMCC) VFS Solenoid Resistance — expected: Approximately 4.9 - 5.2 Ohms at 70°F.. Failure: A reading of 0 ohms (short), infinity (open), or a value significantly outside the expected range indicates a faulty solenoid coil.
• TCC Solenoid Circuit Voltage (Key On, Engine Off) — expected: Approximately 12V (+/- 0.5V) at the connector.. Failure: Voltage below 9V points to a low voltage condition in the wiring harness or from the TCM/PCM.
• Other Shift Solenoids Resistance (e.g., L/R, UD, OD, DC, 2/4) — expected: Approximately 1.6 - 1.8 Ohms at 70°F.. Failure: While not the direct cause of P2764, a reading outside this range for other solenoids in the pack can indicate a widespread pack failure, justifying replacement of the entire unit.

Scan Tool Commands That Help

• wiTECH (or other professional bidirectional scanner): TCC PWM Solenoid Actuation / Test — This command is used to manually cycle the TCC solenoid on and off. A technician can listen for an audible click from the transmission pan and monitor voltage/current on the circuit to see if the solenoid is responding to commands from the TCM. This helps differentiate between a failed solenoid, a wiring issue, or a faulty TCM driver.

Wiring & Ground Locations

• 62TE Main Connector (23-way) — On the front side of the transmission case, where the main vehicle harness connects.. This is the primary test point. Pin 3 is the TCC VFS (Variable Force Solenoid) control circuit, and Pin 10 is the 12V power supply from the transmission relay. Technicians test resistance and voltage at these specific pins to diagnose the circuit without removing the transmission pan.
• Main Engine/Transmission Ground Strap — A braided ground strap located on the top of the transmission, often attached to a starter bolt and connecting to the chassis frame near the driver's side headlight or under the fuse box.. This is a known weak point on ProMasters. A corroded or loose ground here can cause intermittent low voltage conditions across the transmission's electrical system, potentially triggering a P2764 'Circuit Low' code even if the solenoid and its specific wiring are intact.

Real Owner Repair Stories

• YouTube user comments and multiple videos (2014 Ram ProMaster 2500) — No crank, no start, clicking sounds, intermittent starting issues.
  ❌ Tried (didn't work) Replacing starter, checking battery.
  ✅ What actually fixed it Adding a supplementary ground cable from a starter motor bolt directly to a solid chassis ground point under the hood fuse box. This bypasses the potentially faulty factory ground strap and provides a consistent ground for the starter and transmission electronics.

OEM Part Supersession History

• 68029389AA, 05078709AB → 68376696AA, which is then superseded by 68371508AB — Internal updates and revisions to the solenoid pack for improved durability and performance.
  Heads up: While the form factor is the same, it is always recommended to use the latest part number (68371508AB) for all 62TE applications from 2006 and up to ensure compatibility with the latest TCM software and improved internal components.

Model Year Variations Within This Range

• 2019-2021: For the 2019 model year, the 62TE transmission in the ProMaster was revised with a larger parking pawl and other internal updates. While this doesn't directly affect the P2764 code's cause, it's important to use a late-model-spec transmission or torque converter if replacing the entire unit on a 2019+ van to ensure correct fitment.