91 Locking Hubs

Group;
I've got a 91 Toyota 4x4 PU, and after having a brake job and replacement of wheel bearings done a few weeks ago, I discovered the truck now has a loud pulsing roar at ~47mph.. I don't hear it below 45 or above 50mph. I took the truck back and and went round and round with the shop (Goodyear Gemini) where the manager swore there was nothing wrong. I took the lead mech for a ride, showed him the noise, he agreed there -was- noise as I reported. The mech told the mgr he heard the noise, the mgr said that was normal..?!?!?!? The mech convinced the mgr to let him recheck/repack the bearings. No change..
I got suspicious when I got the truck back, and upon trying to turn the
right hub lock, it was frozen. I took the truck back, they did -something-
which freed the lock knob, but the noise was still there. Thinking this might be a tire issue, I went to my tire store, and got the tires rotated, no change. Today, I had a bit of spare time, so I jacked the truck up and spun the wheels.. Guess what? The right hub indicates it's free, but
is actually not.. You can rotate the lever freely between lock-free and
in both positions, the hub is locked. The left hub works normally. Apparently our competent people at Goodyear Gemini don't do hubs well.. Now to my question: From what I've described, is it likely that this might be fixable OR am I looking at replacing one or both hubs? Suggestions that I go back to the shop that did this on a rework will be ignored.. Even though the shop is just around the corner, I will stay WELL away from them in the future.. Is this something that I could fix or is it likely to be a can of worms?

Thanks
Dave Frandin
[email protected]

Today, I had a bit of spare time, so I jacked the truck up and spun the wheels.. Guess what? The right hub indicates it's free, but
is actually not.. You can rotate the lever freely between lock-free and
in both positions, the hub is locked. The left hub works normally. Apparently our competent people at Goodyear Gemini don't do hubs well..

That doesn't sound good, I'm sure it isn' good to go driving around in 2WD with one hub locked and the other free. The people at the tire place probably just tried twisting the knob really hard and broke it. They seem to do stupid things at those places. I took my moms Celica down to tire Kingdom to get a nail pulled out of the tire. They pulled the nail and replaces the valve stem, but guess what? The morons forgot to plug/patch the hole! Anyway, I have the same truck and have never had any problems with the hubs. I get a pulsing roar from 0-75, then at 76 it changes to a continous vibration, but mud tires can do that kind of stuff :grinno:

Hehehe... <3 MT's