Transmission Overheats
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
| Condition | Action |
|---|---|
| Aerated fluid - incorrect fluid level |
|
| Air flow to cooler obstructed | Remove the air flow obstruction. |
| Engine overheat | Correct the overheating condition. Refer to Symptoms - Engine Cooling . |
| Inaccurate temperature gauge or sending unit | Replace the gauge and/or sending unit. |
| Inaccurate sump temperature sensor | Replace the pressure switch manifold (PSM) or internal harness. Refer to Pressure Switch Manifold Replacement or Wiring Harness Replacement . |
| Excessive cooler circuit pressure drop | Inspect for plugged cooler, lines too small, collapsed hose, too many elbows in circuit. |
| Transmission cooler lines reversed | Connect the cooler lines properly. Oil and water should flow in opposite directions. |
| Fluid cooler lines restricted | Remove restrictions and clean or replace the lines. Refer to Transmission Fluid Cooler Hose/Pipe Replacement . |
| Torque converter - wrong converter, no torque converter clutch, stuck stator, or slipping stator | Replace or repair the converter assembly. Refer to Torque Converter Replacement
. A stuck stator will not allow cool down in Neutral. |
| Cooler flow loss due to internal transmission leakage | Overhaul the transmission. |