I have a small grinding noise comming from the front of the truck( 95 4runner v6). I really sounds like bearings grinding in the wheels. It only makes the noise when the truck is in motion. So I replaced the bearings and the bushings on both front wheels, and the sound is still there. It is obviously a moving part because it only happens when the truck is moving. Is there something I need to grease or lube under the truck? Axle? Drive shaft? Diff? Please help, its driving me crazy!

 

Depending on the vehicle there are multiple grease points on your drive shafts. You may have a sticker under the sunshade showing all the lube points. To help isolate the noise you should put the truck on jack stands (usual precautions) or lift (better) and rotate the wheels and see if you can isolate the noise from under the vehicle.
Good luck

 

anything in the axle that could be grinding? Lube points?

 

what about front diff, or transfer case. If they are low on fluid, could thay make a grinding noise?

 

Relax, yes there are lots of things that could grind some expensive some cheap. Jack the truck up, put it on jack stands and turn the wheels and listen for the noise. You can also check the level and quality of the fluid in the front diffs (is it full of shinny metal particles-bad). Low fluid will make more of a whine unless you are completely dry. It could be the constant velocity joints, but that is more of a low speed clunk, how do the cv-boots look? More info is needed to isolate the problem.
Does the noise change when you apply the brakes?
Does the noise change when you turn the steering wheel?
Does the noise change when you select 4 wheel drive?
Answering these question will help isolate the problem and where to look when you put the truck on stands and spin the wheels.

 

the boots look okay. no tears. I lubed the driveshaft with all the points I could find. Its definitlynot a clunk. It sounds like if you took a bunch of marbles and put them in your hand and rolled them around. Could i have missed one of the grease points? Some of the zurks took a lot of grease it seemed.

 

I know this is the newbie tech section but you still have to methodically go through the diagnostic steps. It is very difficult to give sage advice if you don't answer the question or follow the advice given especially since we can't examine or hear the truck. And the reason why you didn't do a check.
More info is always good: this a manual or auto, millage?

Yes you may have missed a grease point but that wouldn't produce "you took a bunch of marbles and put them in your hand and rolled them around". This sound like a bearing in your transmission.
Important:- This noise goes with road speed or engine speed?
To rule out the box while driving take the vehicle out of gear and press the clutch, what happens to the noise?
AND
Does the noise change when you apply the brakes?
Does the noise change when you turn the steering wheel?
Does the noise change when you select 4 wheel drive?
AND when checking the boots did you spin the wheels and hear the noise?
DO the checks and people will be more able to help!

 

could be your bottom end going out. I have seen many v6 bottom ends go out.

 

This is dumb, but the brakes were just done on this rig and the tech that did the work didn't but the shim kit in behind the brake pads, and the brake pads were rattling inside the calipers. How dumb is that. Put the shim kit in , and no more rattle...

 

Yea and there was much rejoicing!