Q: What is the purpose of the clutch pilot bearing and how should it be inspected and replaced on Ford Explorer Sport Trac?
A: The clutch pilot bearing is a needle roller type bearing which is pressed into the rear of the crankshaft. It is pre-lubricated and does not require additional lubrication. Its primary purpose is to support the front of the transmission input shaft. The pilot bearing should be inspected whenever the clutch components are removed from the engine. Due to its inaccessibility, if you are in doubt as to its condition, replace it with a new one. If the engine has been removed from the vehicle, disregard the following steps which do not apply. Remove the transmission. Remove the clutch components. Inspect for any excessive wear, scoring, lack of grease, dryness or obvious damage. If any of these conditions are noted, the bearing should be replaced. A flashlight will be helpful to direct light into the recess. Removal requires a special puller with internal jaws. Remove the bearing and clean the crankshaft recess. To install the new bearing, lightly lubricate the outside surface with lithium-based grease, then drive it into the recess with a soft-face hammer. The seal must face out. Install the clutch components, transmission and all other components removed previously, tightening all fasteners properly.