P2764 on 2005-2012 Chrysler 300: TCC Solenoid and Torque Converter Guide

What's Unique About the 2005-2012 Chrysler 300

The 2005-2012 Chrysler 300 used several different automatic transmissions, which changes the diagnosis for P2764. V8 models and some early V6s used the 5-speed NAG1 (W5A580) transmission, where this code often points to a failure of the conductor plate which houses the solenoids and speed sensors. A common contributing factor is a leak from the 13-pin electrical connector, which can wick fluid up the harness to the control module. Later V6 models (2011-2012) used the 62TE transmission. For these vehicles, Chrysler issued a Technical Service Bulletin (TSB #9004009) stating that if the TCC solenoid tests okay, the P2764 code indicates a complete torque converter failure. This makes it critical to identify the correct transmission before attempting a repair.

Diagnostic Flowchart

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

Generation note: This range covers the first generation (2005-2010) and the start of the second generation (2011-2012). First-gen models used the 4-speed 42RLE (early V6), 5-speed NAG1 (V8 and some V6 AWD), while second-gen models introduced the 62TE and 8-speed transmissions for V6 engines but kept the NAG1 for V8s initially. The cause and fix for P2764 are highly dependent on which transmission the car has.

Symptoms You May Notice

• Check Engine Light is on
• Vehicle enters "limp mode," often getting stuck in second gear.
• Harsh, erratic, or slipping shifts.
• Shuddering or vibration, sometimes described as driving over a rumble strip.
• Engine stalling when coming to a stop, particularly when shifting into Drive but not Reverse.
• Increased fuel consumption.
• Delayed gear engagement, felt as a pause after shifting from Park.

Most Likely Causes

1. Failed TCC Solenoid / Conductor Plate (NAG1 Transmission) 🔴 High Probability On the Mercedes-designed 5-speed NAG1 transmission used in V8 models, the solenoids and speed sensors are integrated into a single 'conductor plate' that sits atop the valve body. This part is a very common failure item due to heat and age causing the fine internal wires and sensors to break. A leaking 13-pin electrical connector sleeve is also a frequent cause, as fluid wicks up the harness and can damage the TCM.
   How to confirm: A technician can test the solenoid's resistance from the TCM connector to verify an open or shorted circuit. For the TCC lock-up solenoid, the resistance between pins 17 and 38 on the TCM connector should be approximately 2.7 ohms. Visual inspection of the main transmission connector for fluid contamination is also a key step.
   Typical fix: Replace the transmission conductor plate, along with the filter, fluid, pan gasket, and the electrical connector sleeve, which is prone to leaking.
   Est. part cost: $100-$250
2. Failed Torque Converter (62TE Transmission) 🔴 High Probability As documented in Chrysler TSB #9004009, the 62TE transmission (found in 2011-2012 V6 models) has a known issue where an internal torque converter failure will set code P2764. This happens when the lock-up clutch lining burns out or the piston cracks.
   How to confirm: Follow the diagnostic path outlined in the TSB: first, test the TCC solenoid and its wiring. If the electrical circuit and solenoid are functioning correctly, the torque converter is condemned.
   Typical fix: Replace the torque converter. This is a major repair that requires removing the entire transmission.
   Est. part cost: $300-$800
3. Failed TCC Solenoid / Solenoid Pack (42RLE or 62TE Transmission) 🟡 Medium Probability The TCC solenoid itself can fail electrically or become mechanically stuck. On these transmissions, it's often part of a larger solenoid block or pack.
   How to confirm: An ATRA bulletin (#1648) notes that on the 62TE, stalling in Drive but not Reverse is a key symptom of a stuck TCC solenoid. A scan tool can command the solenoid on and off to check its function, and its electrical resistance can be measured.
   Typical fix: Replace the transmission solenoid pack. This requires dropping the transmission pan and, on the 62TE, the front transmission cover. 🎬 Watch: How to replace the 62TE solenoid pack and check fluid. A 'Quick Learn' procedure is required after replacement.
   Est. part cost: $200-$500
4. Low or Dirty Transmission Fluid ⚪ Low Probability Incorrect fluid level or fluid that is old and contaminated with clutch material can cause erratic solenoid operation and pressure issues.
   How to confirm: Check the transmission fluid level and condition. Note that many of these transmissions do not have a traditional dipstick and require a special tool and procedure. Fluid should be red/pink and not smell burnt.
   Typical fix: Perform a transmission fluid and filter change using the correct type of fluid (e.g., ATF+4 for 42RLE/62TE, specific fluid for NAG1).
   Est. part cost: $100-$200
5. Damaged Wiring or Connectors ⚪ Low Probability
   How to confirm: Visually inspect the transmission wiring harness for any signs of damage, corrosion, or loose connections, particularly at the main 13-pin connector on the NAG1 transmission, which is a known leak point.
   Typical fix: Repair or replace the damaged section of the wiring harness. Replace the 13-pin connector sleeve if it is leaking.
   Est. part cost: $20-$150

Rare But Worth Checking

• Faulty Transmission Control Module (TCM): While rare, the TCM itself can fail, causing it to incorrectly report a solenoid circuit fault. This is sometimes caused by transmission fluid wicking up the wiring harness from a leaking connector on the NAG1 transmission. This should only be considered after all other possibilities (solenoid, wiring, torque converter) have been exhaustively ruled out.

Diagnosis Steps

1. Check and verify the transmission fluid level and condition. Note that a special dipstick tool may be required.
2. Scan the TCM for any other transmission-related trouble codes, such as P0700 or P0740.
3. Identify the specific transmission in the vehicle (42RLE, NAG1, 62TE). This is critical.
4. Inspect the transmission wiring harness and main electrical connector for damage, corrosion, or fluid intrusion. On NAG1 transmissions, this connector is a known leak point.
5. For NAG1, test the resistance of the TCC solenoid circuit from the TCM connector (pins 17 & 38) to check for an open or short; the reading should be around 2.7 ohms.
6. If possible with a capable scan tool, command the TCC solenoid on and off to verify its mechanical operation.
7. If the vehicle has a 62TE transmission and the solenoid/circuit test good, follow TSB #9004009 and diagnose a failed torque converter.
8. If the vehicle has a NAG1 transmission and the circuit tests bad or is intermittent, the conductor plate is the most likely cause.
9. If the solenoid is confirmed to be faulty, drop the transmission pan and replace the solenoid pack (62TE/42RLE) or conductor plate (NAG1).

Parts You'll Likely Need

• Transmission Conductor Plate (OEM #52108308AC) — This is the most common fix for V8 models with the 5-speed NAG1 transmission, as it contains the failure-prone solenoids and speed sensors. Part number 52108308AC is a common replacement.
  Trusted brands: Mopar, Dorman, SKP, Vaico
  OEM price range: $200-$300
  Aftermarket price range: $100-$180
• Torque Converter — Per TSB #9004009, this is the required repair for 2011-2012 V6 models with the 62TE transmission if the TCC solenoid is not faulty.
  Trusted brands: Mopar, Luk, Transtar
  OEM price range: $500-$800
  Aftermarket price range: $300-$500
• Transmission Solenoid Pack (OEM #68376696AA) — For 42RLE and 62TE transmissions, a faulty TCC solenoid often requi

Related Codes That Often Appear With This One

• P0740 — This code also relates to 'Torque Converter Clutch Circuit Malfunction'. TSB #9004009 explicitly groups P0740 and P2764 together with the same diagnostic procedure for the 62TE transmission.
• P0700 — This is a generic transmission fault code indicating that the TCM has stored a specific fault, such as P2764. It acts as a general alert for a transmission issue.

Technical Service Bulletins (TSBs) & Recalls

• Chrysler TSB #9004009 / #9004206
• ATRA Technical Bulletin #1648

Platform-Specific Known Issues

• NAG1 Conductor Plate vs. 62TE Torque Converter: The most critical vehicle-specific issue is correctly identifying the transmission. For V8 models with the NAG1, the problem is almost always the conductor plate and/or the leaking 13-pin connector. For later V6 models with the 62TE, the diagnostic path from TSB #9004009 is paramount: if the solenoid and wiring are good, the torque converter has failed.
• Stalling in Drive, but not Reverse (62TE): A specific symptom pattern for the 62TE transmission, noted in ATRA bulletin #1648, is the engine stalling when shifted into Drive but operating normally in Reverse. This strongly points to a TCC solenoid that is mechanically stuck in the 'on' position, keeping the torque converter locked at a stop.

Mechanic-Grade Diagnostic Values

• 62TE Transmission TCC Solenoid Resistance — expected: ~5.0-5.3 Ohms. Failure: A reading that is significantly higher, lower, or open (infinite resistance).
• 62TE Transmission Shift Solenoid Resistance (Low/Reverse, Underdrive, etc.) — expected: 1.6 - 1.8 Ohms. Failure: An open circuit or a reading significantly outside the expected range, such as 4.1 or 7.2 Ohms, indicates a failed solenoid within the pack.
• TCC Solenoid Circuit Voltage (Key On) — expected: Approximately 12V (+/- 0.5V). Failure: Voltage below 9V indicates a low-voltage condition consistent with the P2764 code.

Scan Tool Commands That Help

• Professional Scan Tool (e.g., wiTECH, JScan, Autel): Reset Learned Adaptives (NAG1) / Quick Learn (62TE) — This procedure is required after replacing major transmission components like the valve body, conductor plate (NAG1), solenoid pack (62TE), or the entire transmission. It erases old shift data and allows the TCM to relearn shift points and clutch fill volumes with the new parts.
• Professional Scan Tool (e.g., wiTECH, JScan, Autel): Store Learned Adaptives (NAG1) — After performing the NAG1 adaptation drive cycle, this command can be used to manually force the TCM to store the new values immediately, rather than waiting for the automatic 10-minute interval.
• Professional Scan Tool with bidirectional control: TCC Solenoid Activation Test — This command manually cycles the TCC solenoid on and off while the engine is running to verify its mechanical function. A technician can feel or hear the solenoid click, confirming it is not mechanically stuck.

Wiring & Ground Locations

• TCM Fuses (2nd Gen, 2011+) — In the front fuse box (engine bay), fuses F29 and F37. In the rear fuse box (trunk), fuse F26 may also be involved depending on the vehicle's configuration.. A blown fuse will cut power to the Transmission Control Module (TCM), which can cause various transmission codes, including circuit faults like P2764.
• G100 — On the left side of the transmission case.. This is a primary ground point for the transmission itself. A loose or corroded G100 can create a poor ground path for the solenoids, leading to intermittent low voltage readings and codes like P2764.
• NAG1 TCM Ground Circuits — At the Transmission Control Module C1 harness connector. The circuits are designated (Z910) or (Z912).. An open in the TCM's primary ground circuit can cause a complete loss of communication or erratic behavior, leading to false trouble codes. A service manual procedure involves checking for a good ground at this connector.

Real Owner Repair Stories

• Owner report on a Chrysler Town & Country (shared platform with 62TE) (2010-2014 Chrysler Town & Country with 62TE transmission) — Check engine light with codes P2764 and P0740, engine stalling, and shuddering.
  ❌ Tried (didn't work) Replaced the transmission solenoid pack and performed the 'Quick Learn' procedure.
  ✅ What actually fixed it Following the Chrysler TSB, the shop removed the transmission and replaced the torque converter. This resolved all symptoms and codes. The failure was mechanical within the converter, not electrical in the solenoid.

OEM Part Supersession History

• 52108308AB → 52108308AC — Revision and improvement of the NAG1 conductor plate to address common failure modes.
  Heads up: 52108308AC is the correct replacement for earlier versions like ...AB.

Model Year Variations Within This Range

• 2011-2012 (V6 Models): These years predominantly feature the 6-speed 62TE transmission. For P2764, this makes the torque converter a high-probability cause per TSB #9004009, a diagnostic path not applicable to the NAG1 transmission found in V8 models.
• 2005-2010 (V8 and some V6 models): These models primarily use the 5-speed NAG1 (W5A580) transmission. For P2764, the most common failure is the conductor plate (part #52108308AC) and the associated 13-pin connector sleeve leak, which is a distinct issue from the 62TE transmission.