Reasons for the increased oil level in the automatic transmission:
* Overfilling when changing oil: It is necessary to check the oil level according to the vehicle instructions and be careful not to overfill it.
* Oil pan gasket failure: May cause transmission oil to leak into the engine oil pan, causing the oil level to rise.
*Faulty oil pump: A faulty oil pump can cause system pressure to build up, resulting in overfilling.
* Coolant Leak: Some vehicles have coolant passing through the transmission cooling system. A coolant leak can cause it to enter the transmission oil, raising its level.
* Adding the wrong type of oil: Using oil that does not meet the manufacturer’s recommendations can cause drainage problems and elevated levels.
Consequences of an increased oil level in an automatic transmission:
* Oil Foaming: Excess oil may foam, reducing its lubricity.
* Increased Transmission Pressure: Excess oil increases pressure on various transmission components such as gears, bearings and seals.
* Reduced transmission performance: Oil foaming and increased pressure can cause clutches to slip and reduce transmission performance.
* Increased transmission wear: Increased oil pressure and foaming can cause premature wear of transmission components.
Corrective Action:
* Checking the oil level: Check the oil level using a dial gauge or electronic meter with the engine running and warm.
* Draining excess oil: If the oil level is too high, drain the excess using the drain plug or the dipstick.
* Leak detection: Check for oil leakage from the oil pan gasket, oil pipes, etc.
* Replace the oil pan gasket: If the oil pan gasket is found to be leaking, it must be replaced.
* Oil Pump Check: If other causes have been ruled out, the oil pump may need to be checked for problems.
* Oil and Filter Change: If the oil is contaminated, replace the oil and oil filter according to the manufacturer’s recommendations.