RAM Fault Code

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P0744

TCC Shudder / High Operating Temperature

System

Torque Converter

Symptom

TCC Shudder / High Operating Temperature

Diagnosis & fix steps

LOGIC: TCC Enable Solenoid Circuit Intermittent / Slip Detected. ACTION: Check the 8-pin and 12-pin transmission case connectors for fluid wicking or pin fretting. Measure resistance of the linear lockup solenoid SL (spec: ~5.0–5.6Ω). If electrical passes, drop the valve body to check for a sticking lockup control valve.

Red Seal field insights

Bore Wear: Heavy cyclic lockup actuation in urban medium-duty stop-and-go service wears the lockup control valve sleeve, venting torque converter apply fluid and generating severe TCC slip heat.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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