Pinpoint Test C: Transmission Overheating

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions
- Bent or crushed transmission fluid heat exchanger tubes
  - Inspect the transmission fluid heat exchanger coolant hoses for kinks, damage, and leaks. INSTALL new components as necessary. REFER to: Transmission Cooling - Component Location .
- Damaged transmission fluid heat exchanger
  - Inspect the transmission fluid heat exchanger for damage and leaks. INSTALL new components as necessary. REFER to: Transmission Fluid Heat Exchanger .
- Excessive vehicle or towing loads, severe vehicle use
  - Refer to the Owner's Literature for more information on vehicle load, GVW and trailer towing.
- Incorrect transmission fluid level
  - Check the transmission fluid level. ADJUST the transmission fluid level as necessary. REFER to: Transmission Fluid Level Check .
- Transmission fluid condition
  - Collect a transmission fluid sample and inspect it for debris or contamination. REFER to: Preliminary Inspection .
- Engine overheating
  - Check the engine cooling system for proper operation. REFER to: Engine Cooling .
- Transmission cooling system clogged or restricted
  - Carry out the Transmission Fluid Cooler Backflushing and Cleaning procedure. If transmission fluid heat exchanger flow is low after backflushing, INSTALL new components as necessary. REFER to: Transmission Fluid Cooler - Backflushing and Cleaning .
- Transmission fluid heater coolant control valve malfunctioning
  - INSTALL a new transmission fluid heater coolant control valve. REFER to: Transmission Fluid Heater Coolant Control Valve .
- Internal transmission concerns
  - Resolve any transmission performance diagnostic trouble codes (DTCs) or symptoms, especially those related to the TCC or clutch applications. REFER to: DTC Chart and Pinpoint Tests - 3.5L V6 PowerBoost (CN) . REFER to: Diagnosis By Symptom .
  - Inspect the internal transmission components for wear or damage. Check all clutches and bearings for signs of overheating. INSTALL new components as necessary. REFER to: Transmission .
Possible Sources
- Damaged or restricted transmission fluid heat exchanger coolant tubes
- Damaged or restricted transmission fluid heat exchanger
- Incorrect transmission fluid level or condition
- Transmission fluid heater coolant control valve
- Internal transmission components
Diagnostic steps are not provided for this symptom or DTC. REFER to: Diagnostic Methods