A friends truck is messing up on his and from what I can gather, its the "tone ring". Id never even heard of it so I figuured Id turn to the pro's. The truck is a 93 F150, 5.0 with the E4OD transmission that is shifting wierd and the speedo is jumping around all crazy. From what Ive gathered from google, its either the VSS or the tone ring. He just replaced the VSS so Im guessing the tone ring needs replaced. My question is, how? I cant seem to find anything on it. Thanks guys.