Just got back from a great biking trip in the Canyonlands of Utah. We used my 87' FJ-60 as a support vehicle for the 100 mile loop of mild 4x4 terrain. We all took turns driving while the rest biked. When it was the "guy I didn't know's" turn, I walked him through how to put it in 4HI, 4Lo etc., with emphasis on locking the hubs. Needless to say he never locked the hubs (either because he was lazy, inconsiderate, or just stupid) and then he drove in 4wd for a large portion of the day. By the end of the day when I saw my truck again it was making crazy grinding noises (which never seemed to alarm him!) while in 4wd. My question is what kind of damage did this likely do to my front axle and hubs? He is going to have to pay for it, and I want to get an idea what to tell him and the rest of the group while I am shopping for a mechanic.

