Let me preface this with an "I don't know your exact truck but I've dealt with many..." sort of disclaimer...
Essentially, what Ray is saying is, put the truck in 4H (not the 4HCL selection) and lift both tires off the ground (preferably on jack stands) and give the wheels a spin (as if its traveling down the road). If the opposite tire/wheel/axle spins (it should spin in the opposite direction) you know everything is good. If it doesn't, grab the CV axle shafts on each side of the diff and turn it by hand. If you're able to turn the axle, and the tire/wheel do not turn with it, I'd recommend inspecting the hubs. With the front wheels off the ground, and in 4H, you should also be able to turn the drive shaft, but it might/should give some resistance, the front wheels should turn. That will let you know if CAD is functioning or not....
Well... not exactly. I'm saying that in 4WD and the front end up off the ground he should not be able to turn the front wheels at all since he's in 4WD and the rear tires aren't turning... but upon further reflection, I'm wrong on that point. (oops... sorry)
I now realize the wheels will turn regardless. He really needs to get all 4 tires up in the air safely (jack stands on level ground minimum but commercial vehicle lift preferred) & run in 4WD to check what's happening. If may be prudent to have someone in the vehicle with their foot on the brake to control how much the speed at which drivetrain moves (which will help minimize any further grinding that may be occurring
)
Then while it's safely raised, inspect underneath and confirm where the grinding noises are coming from.
As for the latter point, good luck finding anything on wire.
I know some seem to have difficulty finding things on the wire while plenty of others are fine. Many who have difficulty have admitted they've simply been too lazy to learn the forum's search syntax (even after it's been explained to them). Additionally the forum also has a built in Google search engine for those who prefer that search medium.
Also if the person posting things doesn't use the right terminology that future readers can use to search for their post, there's no amount of search engine massaging that will correct that.
All that said, I've found both 4x4wire and Expo suffer from the same issues when it comes to ease of searching.
Last but not least I should fully disclosed that I am a long time Moderator on 4x4wire's Mitsu tech section and have a plethora of experience helping others navigate that forum and while I do agree with some criticism's (picture posting ease, etc.) search hasn't been a true forum issue. It's usually been a operator error / user issue. :ylsmoke:
