DoZZa

iTrader: (4)

I have just finished installing BC coilovers and a Whiteline Roll Centre adjustment kit, which includes tie rod ends and bottom balljoints to my 97 JDm STi.

Before I did this job I was getting bad vibration on the front drivers wheel, which I knew was a knackered bearing.

I changed the entire hub assembly and driveshaft on that side of the car. These are used items.

I now have extreme vibration throughout the whole of the front of the car. When I say extreme I mean the whole car is shaking violently at the front on both sides!!!!! Its that bad the the door mirrors look like they are about to fall off!!

Brakes look fine, discs are not warped etc.

This vibration will dissapear when the car is going round a fairly tight bend, no vibration, but as soon as the steering wheel hits centre again the vibration is back and still severe.

This vibration starts to occur at any speed above 20 mph. Vibration becomes faster with more speed so its almost certainly a rotational problem.

I have read that wheels could be an issue, these are not standard wheels so I will check them for proper seating. But I would have thought that if the wheels were not seated properly then the vibration would still be apparent when going round tight'ish bends.

Any thoughts on this?

I posted the video below a few weeks ago but got little response.

Both front driveshafts move like this and I am not sure if this is supposed to be happening, maybe this is a contributing factor?

[youtube]cWYY6GxMuNQ[/youtube]

I will post this in the suspension section also as I am not sure if this is a drivetrain or suspension issue! Thanks

DoZZa

iTrader: (4)

Well I have discovered that one of the wheels is buckled so I put a different wheel on. This has not made one ounce of difference. Vibration from the front is still very severe.

I have just ordered brand new driveshafts and wheel bearings for the front.

I am about to go out and check the engine and gearbox mounts for any excessive movements.

If new shafts, bearings and the mounts are OK then I am clueless as to whats causing this.

Like I said above I have just fitted new tie rod ends and ball joints, soits not those, although the white line ball joint was not a tight fit into the hub as the original one but I can see that being the cause.

Just thought that it might have something to do with the steering rack so I will check that and probably order some new bushes for the rack for good measure.

Any other possibilities?

The Pink Ninja

iTrader: (23)

Have you had any sort of alignment done after fitting the coilovers and centre roll kit?

Dirk Diggler 75

Get your front wheels up in the air and check for any movement up and down and side to side as far as i know there should be a very small amount of play in the actual driveshaft, but there should be no up and down movement.

360ste

iTrader: (1)

Deffo get wheel alignment done. Camber and tracking will be out. Even a basic tracking adjustment would be worth doing then once sorted get a full specialist setup.

DoZZa

iTrader: (4)

Thanks for the help chaps.

Do you think alignment could cause such a severe vibration throughout the car? I hope it is that simple but something is telling me its not going to be that.

The drive shafts have no play up, down or side to side. Just back and forth where the end of the shafts meet the gearbox as shown in the video.

I have noticed that the hub nuts on the front like to make themselves fairly loose after a while, no idea why.

My worst fear is something has gone wrong inside the gearbox. If so then I will be taking a large hammer to the car as i really cant be fcuked with messing about with cars anymore!!!!!!!

Anyway, need to get a new wheel before any alignment can be attempted.

Poxy cars!

DoZZa

iTrader: (4)

Just thought that I would add that there is a kind of knocking/tapping noise coming from the front when the car is on full lock and in reverse.

Strange thing with that is that if you start off in full lock and go forward the noise does not occur, but go backwards and the noise occurs, and heres the strange part, go forward after going backwards and the noise will be there. Fcuked up or what?

Did I mention that I am feed up with cars of all descriptions. Im buying a push bike!

scooby-k

"This vibration will dissapear when the car is going round a fairly tight bend, no vibration, but as soon as the steering wheel hits centre again the vibration is back and still severe".

This sounds like a bearing. As you turn the steering wheel you transfer the load onto the other bearing.

DoZZa

iTrader: (4)

It was a drive shaft in the end!

dannycelluk

Im not sure about the vibration but the knocking under full lock and reverse could be centre diff. I have just had this changed on mine, the knocking only happened every now and then on my car, normally after a long drive.