Hub removal on the trailer to change s-cam.

What oil did he use?

 

Why is that wrong? Lucas makes 80W-90 and 85W-140 gear oil. They also make a hub oil but that looks more like a stop leak. Or they could have just been using a Lucas container with something else in it besides Lucas.

 

That in and of itself probably didn’t do much damage. Especially if you been running in warmer temperatures. Lucas is like straight 140. I mean I wouldn’t suggest it, but the flat spot is your issue. Good catch

 

it truly boggles my mind how completely incompetent some "mechanics" can be!! How do those people even claim to be mechanics? Using an impact to tighten the nuts on the bearings? that's banana's. Unless he just used the impact to make sure everything was fully seated and then backed it off. I will usually do that with new bearings and races. tighten it really tight then back it off and set it by feel. but never with an impact

 

I use the Lucas hub oil in my steers. Never noticed being hotter. Leaking seals will leak slower. Also use 140 synthetic in rears. Probably lose a small % in mpg’s. So far at 2.5 mil. they haven’t failed yet.