Some 2011-2014 Fiesta and 2012-2014 Focus vehicles equipped with a DPS6 transmission may experience a fluid leak between the engine and transmission. Be aware that the engine oil and DPS6 transmission fluid are similar in color and texture. A transmission fluid leak at the input shaft seal can cause a buildup of fluid in the bell housing; creating the appearance of a rear main seal leak. The rear main seal should only be replaced after a rear main seal failure is confirmed through appropriate diagnostics outlined in the updated online Workshop Manual (WSM) Section 303-00 / Diagnosis and Testing with the use of Fluorescent dye (164-TP33200601).
