Inspection and Verification
When fluid leakage is found in the fluid cooler, install a new fluid cooler.
When there is evidence of transmission assembly or fluid contamination due to the following transmission failure modes, install a new fluid cooler.
- Major metallic failure
- Multiple clutches or clutch plate failure
- Sufficient component wear which results in metallic contamination
Symptom Chart
| Condition | Possible Sources | Action |
|---|---|---|
| Transmission overheating | Damaged radiator | REPAIR or INSTALL a new radiator. REFER to ENGINE COOLING . |
| Plugged auxiliary fluid cooler | INSPECT auxiliary fluid cooler for blockage. INSTALL new if required. REFER to Auxiliary Transmission Fluid Cooler . | |
| System leaks | INSPECT transmission fluid cooler and tubes for leaks. REPAIR as required. | |
| Incorrect fluid level | ADJUST to correct level. | |
| Fluid condition | INSPECT according to instructions under Check Fluid Level and Condition. REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - 5R55S for 5R55S or AUTOMATIC TRANSAXLE/TRANSMISSION - 6R60 for 6R60. | |
| Damaged, blocked, reversed, leaking or restricted cooler lines or cooler tubes | INSPECT cooler lines and tubes. REPAIR or FLUSH as necessary. | |
| Engine concerns causing transmission to overheat | INSPECT engine cooling system. REFER to ENGINE COOLING . | |
| Excessive towing loads | CHECK gross vehicle weight. | |
| Incorrect engine idle or driveability concerns | REFER to the Introduction - Gasoline Engines . |
Symptom Chart
Transmission Fluid Cooler Flow Test - 5R55S
- Refer to «AUTOMATIC TRANSAXLE/TRANSMISSION - 5R55S»(ref-270891) .