Road Hog

Also check where the rod from the handle goes to the valve--sometimes the rod at the valve has the retaining pin-then the rod and knob will unscrew from the valve

I am in the process of removing my pump panel aceess panel on my 85LS to get inside the pump. I have everything removed but for the life of me I can't remove the knob for the transfer valve. It is oval shaped and looks like it is threaded on. Any suggestions would be appreciated.

It sounds as if the interaxle differential may be making the noise-it can be caused by numerous things-make sure all tire are the same size and properly inflated-if everything at the wheels is good, the interaxle buttons or cams oould be worn which csn cause the driveshaft to slip almost a gear slipping-if that is the problem the noise will almost be a ringing sound (resonating through the driveshaft-it also could be a broken spider gear in one of the rears but that usually only will make a noise when cornering or if one of the wheels are spining-the easier check is the interaxle differential which if it is a Mack rear, is right in the front section of the front rear-