funny vibration-4age 20v in ae92 fxgt -holy clutch batman!

[deaf_rattle]

When the speed gets up 4th and 5th gear driving, when i get to about 110kph there is a horrible shudder like a bad wheel balance. but i have just had the fronts replaced and rebalanced and its still doing it.

Interestingly though, if you put your foot on the clutch the vibration goes away.

Its real nasty and you can see the steering wheel shuddering left and right when its doin it.

I am thinking it could be the cv joint which was making alot of noise earlier on, would this likely cause a shuddering?

Anything else i should check?

cheers

[Mr Revhead]

engine mount?
or maybe suspension bush

doubt itll be the c/v

[deaf_rattle]

will have to have a look, its pretty annoying haha.

i wouldve thought a mount wouldve caused vibration at other speeds/revs as well.

i guess it could be and ive forgotten how smooth it used to be.

[Mr Revhead]

hey, internet diagnosis.. im half guessing!

[deaf_rattle]

hey, internet diagnosis.. im half guessing!

fair nuff

a guy on toymods has suggested that too, so might be a good place to start.

might have to get in touch about some mounts if they are poked

[B1NZ]

hey, internet diagnosis.. im half guessing!

fair nuff

a guy on toymods has suggested that too, so might be a good place to start.

might have to get in touch about some mounts if they are poked

Ae92's have crap mounts, Mine were shagged and sounds like the same or similar syptoms

[deaf_rattle]

i just checked the engine, no excessive movement, although that was just me trying to shake the engine.

Might have to look into the bushes.

Havent been underneath yet to check the bottom mount though, but the other ones looked fine.

[sergei]

Does it do it when you accelerate or decelerate?
if it changes with the throttle as well, it is your wheel alignment problem along with worn (soft) bushes. For example torque from engine tries to move struts forward while road tries to push struts backwards, if bushes are worn and this movement allowed it can result in self sustained oscillations, as the toe and camber will change as well amplifying the effect.

Well that is my theory anyway.

Engine mounts only cause problems when you suddenly accelerate/decelerate.

It is similar to when occasionally caster wheel on the shopping trolley going left to right erratically, while pushing the trolley dead straight.

[85AW20v]

I've had the same sort of thing in my 92 Lancer. It was worn inner CV joints. Don't know why it happened as its only done 360,000km....

[Mr Revhead]

hmmm have you had the outer c/vs or boots done recently?

some times if the inners are apart and are put back together out of sync they can make funny noises/vibes

[RedMist]

hmmm have you had the outer c/vs or boots done recently?

some times if the inners are apart and are put back together out of sync they can make funny noises/vibes

Seriously? How do you put a CV in out of sync? Are they keyed in Toyotas?
The Porsche ones I've rebuilt tonnes of times doesnt matter which way you locate them, you just have to ensure they are the correct orentation, ie as they are symmetrical and not attached to the stub you can locate them with the inside to the outside. (they have a grove to one edge of the CV to denate orentation)
You cant exactly do that with a Toyota CV as the stub isnt going to face the axle!

[Mr Revhead]

what i mean is if you pull apart the inner c/v
then reassemble it with the tripods in a different slot than they were previously they can make odd noises as they can wear slight grooves/marks in the case.
sorry, should have been clearer

[pc]

I reckon what sergei said.
Check all the usuals as well though, play in wheel bearings, ball joints, rack ends, and make sure the wheel alignment is correctish and everything is done up tight.
put wheels from a different car on the front just to rule out wheel issues.

[FXGTV]

Replacing the suspension bushes in my ae92 fixed a very similar sounding problem...

[deaf_rattle]

Replacing the suspension bushes in my ae92 fixed a very similar sounding problem...

interesting, will have to get in underneath there this weekend and have a nosey

cheers guys

[deaf_rattle]

well it might be more serious than i though.
I now have no drive to the wheels. Cvs are still in one piece and there is a funny noise when the clutch is engaged.
Gearbox coming off tomorrow night. Doh!

[deaf_rattle]

well i think i found the problem

on saturday the fxgt broke down with no drive going to the wheels.
Funny noise when the clutch pedal was pushed in.

Got the gearbox off today, i figure this was causing the vibration.
Exedy clutch kit about a year old.
Everything else looks ok, so will probably get flywheel machined and a replacement clutch plate.

Should i just get a genuine one or get an upgraded after market clutch plate.

What wouldve caused the clutch to have done this anyways?

Cheers

[Bling]

i'd be asking batman about that one too


unless you've modified the FX heavily i'm sure a factory item will be sweet as replacement

[deaf_rattle]

all thats been done is pod filter and exhaust haha
hardly big power gains.

I havent been too hard on the clutch either. Abit puzzled by this.

Oh well, dems the breaks i guess.

[deaf_rattle]

anyone got any suggestions to what clutch plate i should run this time?