1999 Blazer, 4.3 auto. 2wd/4x4 , dropped ? inches.

I got this truck for the cost of getting it out of the pound.

It has a strange shaking mostly noticeable on the passenger side. At first it has a strange sound on and it turned out to be that it had a bad cat. So I removed it at took out what was inside for the time being before I get a new one. So the sound goes away but now there is a different one. I know there is an exhaust leak I don't know if it is that. The passanger side floor and seat shake sorta bad. I don't know if these blazers have springs in the front or not, but mine dose not. I did lift it on stands and ran it to see what the noise was, I now bad bad me, but there was a sound coming from the read passenger side wheel, brakes or maybe wheel bearing. The engine runs smooth and trans shifts good. what can it be?

Also it looks like the CV shafts are leaking but it can also might be resedue from the leaking oilpan. Can the CV shafts make it shake? I need help maybe someone here has had this prob? THANKS IN ADVANCED IF YOU CAN HELP!

I have not ran it on the highway or any higher than 40 and it still shakes then.

 

First thing I would do is check the hubs. Jack it up, grab the tire and check for excessive play going east to west. Next thing would be to rotate the tire that is nearest to the vibration. If the vibration follows the tire, then you have a bad tire. Cv joints ususally click when turning when they are bad and the wheel well will be coated in heavy grease if the boot is torn.

 

I thought about the tires too, they are terribly bad. SO what I did was use the ones off my S-10 and it still shook. Will check for some play but doubt there is any. Could it be that the exhaust is what makes this happen? It does have a leak and the truck has been driven with a messed up cat. conv. that made it shake worse before and it even made the engine run harder.

Also can a sticky caliper be the case? Truck has wired sound coming from the rear passenger side wheel.

 

Are the wheels getting very hot, after only driving for a short time? The rear calipers do go bad frequently, anytime I replace pads on the rear I always put in new calipers.

 

Ok so I put back on stands and checked out weather it made a sound on the front wheels, turns out the 4x4 don't work! I had it lifted up quite high so I could look under and what I saw was that the front drive shaft was moving but the CV shaft would not, even when accelerating. The problem is either the CV shafts are bad or the front pumpkin is. Well I guess I will have to take it appart to see what is wrong.

 

https://blazerforum.com/forum/tech-articles-diy-29/4x4-no-worky-maybe-will-help-7180/
This will help you diagnose your 4x4 issue

 

On my 96 blazer, the hub on the rear axle where the wheel studs are was machined off center over 1/8 inch. Might check them. Feels like a tire is out of balance.