You may have oil as a result of a bad head gasket. You may also really have a problem with a leaking transmission cooler tank. Sometimes oil and Dexron look similar when mixed with coolant.

Tranny fluid is cooled inside a tank with the radiator. If there's a failure, the tranny fluid mixes with the coolant in the radiator.

Something else to consider.



Mike Murrell
'95 Rodeo - 3.2 liter - 2WD - Automatic
'04 Tacoma - 4 banger - Automatic