Analysis of Leakage
WARNING: This page is about a different car, the 2011 Mercury Milan and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
There are 2 different PTU configurations used depending on the transaxle. The repairs made for leakage on these 2 different PTUs may vary depending upon the type and location of the leakage. The specified tools called out in this service information will allow seal replacement without causing damage to the PTU case and drive gear.
NOTE:
Inspection of the seal's mating journal should be performed every time a seal is replaced. The mating part/journal should be replaced if it has any of the following conditions: Radial wear groove that can be felt by running a finger nail across it where seal lip runs. Scratches, pitting, galling, nicks or other shaft damage under or near where the seal lip runs. Discoloration or coked oil on the shaft where the seal lip runs. Shaft corrosion under or near where the seal lip runs. Sharp edges or burrs on the shaft lead in chamfer. NEVER use emery cloth on journal finishes, replace the part.
The PTU may leak different color fluids, red ATF or tan/brown/black gear lube. The PTU and transaxle seals prevent these types of fluids from leaking. It is important to note which color of fluid is leaking to determine the most appropriate service procedure. The residue of red ATF should be cleaned from the PTU to prevent a inaccurate diagnosis of a red ATF leak following the repair.