Which mechanic is good for my jetta 3 1.8 1995. I took it to different service centres and mechanics but stil the front suspension stil make noise.I replacing front disks peds, cv joints, tyrod ends,

What kind of noise you are hearing exactly?

problem most likely not in the diff but in the diff mounting and suspension points
a noise on acceleration or deceleration indicates that the diff housing is free to react to the load being applied and that is mounting bushes , broken mounting plates or other suspension problems
consider this to see if it fits
when you accelerate the reaction of the diff is to roll upwards as the wheels have traction but when under brakes ( deceleration ) the diff rolls forward
hence the bangs in both directions
suggest that you change mechanics and take it to a specialist shop that deals in your make of vehicle for a proper under body inspection of mounts , rubbers, pins and chassis mounting points
another issue her and that si the engine reacts the same way so check engine mounts and reaction rod bushes

Take it back to the mechanic that did the work and complain of this to him. That person is liable for his repair work.

your left brake caliper might be suck in the closed position like you brake is on. jack the car up and see if you can spin the tire if it spins freely then you good you might just need an alignement

YOUR MECHANIC IS RIGHT. THE BUSHINGS MAY NEED TO BE CHANGED. ALSO CHECK TO SEE IF THE GREASE FITTINGS ARE GOOD. SERVICING YOUR SUSPENSION CAN MAKE A BIG DIFFERENCE.

Okay, I had a problem like this with my 1990 Jetta, except there was no thumping noise. My steering wheel started to shake, that also make the whole front end wobble back and forth (side to side) - I took to a mechanic and had both whell bearing replaced. I must tell you that wheel bearing aren't something a mechanic can just check to see if they're good; once they get in there, it's a matter of just putting new ones in. Now, while different makes and models vary as far as cost of repair, (as well as mechanics prices) I paid a mere $400 dollars for my Jetta, which is a foreign made care, which also tend to cost more to fix than American made cars. Regardless, this is what it sounds like may be the problem with your vehicle. You may want to take it to a shop that specializes in alignments and brakes. It could be a loose brake caliper in the front. My brother had a car that was doing that same things, so we took the (front right) tire of, and he was missing both bolts that hold the brake caliper in place. Notice if the car brakes normally or not and if the shake increases, decreases or stays the same. If and when you take it to a mechanic, be sure to give them as much full detail as to what the car is doing so they can diagnose the issue as best as they can. This will save you from spending money on any unecessary parts and labor.

bad strut mounts are a common problem with the aura

If it's a loud bang then I had the same problem with mine after I took it in for some new front tyres. the mechanic said I needed a new steering rack...he was so wrong it makes me sick to think he gets payed for it.

had the camera handy so I put a quick video together for ya. Hope that's it.

http://files.filefront.com/004MOV/;12410360;/fileinfo.html

you should have rear struts with a leveling system and also strut mounts most likey its your strut mounts

can u replace the bearing in the hub? will that fix your problem?