lockings hubs making noise

hi im new to this forum thing so i thought i would give it a try. i have a 99 taco and i love it. but i have a problem. about a month ago when i lock in my hubs my truck starts vibrating at about 40 mph not too bad though just enough to be annoying. when i put them in free there isnt any vibration. ive been told it could possibly be the bearings in the hub are bad and the vibrations are coming from the right front. and it happens only when i lock the hubs i dont even engage 4x4 and it virbrates what do yall think?

 

why do you have the hubs locked but 4 wheel is not engaged? hubs should only be locked if 4 wheel drive in engaged. Some designs i have seen are crappie.

Besides the above here. hub are bad or cv joint going bad. i would rule out something wrong in your dif but i dont think thats the case.

Have you checked the oil in the front dif to make sure it full?

 

I've checked the dif fluid and it's fine I normally don't drive with hubs locked in but I forgot to disengage the hubs after wheeling one day and that's when I noticed the vibration.

 

Take your hubs apart and make sure everything's fine. It's really easy, plus they may need a good greasing.

Here's a nice link about that. http://forum.ih8mud.com/79-95-toyota...b-rebuild.html