mhussein

I recently bought a jdm sti,there is a clunking sound from the rear,it only happens when moving off at slow speed or on turns, if I rev the engine and move off from a junction it does not clunk

Could it be a faulty rear diff or a aftermarket lsd

Can anyone help or advise what to check

Regards

ZANY

I had the exact same problem after numerous suspension items being changed it was the c.v joint on the rear passenger side in the end

MATT93

Does your car have DCCD? its probably just the diff making the noise. I believe it does it when its on a certain split.

mhussein

It feels as a cv joint to me too

I will check them

mhussein

Yes it's got DCCD,it makes the noise in every setting aswell as auto

MATT93

Honestly think it'll just be the adjustable diff. Find someone local with another STI with DCCD and see if it makes the same noise.


Matt.

jonnyboy82

iTrader: (10)

Mine does this too on my widetrack apparently it's normal. Although to me it seems as though something needs lubing or fluid.

ZANY

You won't be able to tell while the shaft is on the car bro as I tried that before I replaced my top mounts and shocks, I currently own a widetrack and there's no noises whatsoever from the rear so not a normal clunk noise to live with IMO

mhussein

mhussein

I will change the rear oil diff and see if that helps

mhussein

Did the suspension sort your issue out bro

I can feel the clunk in the cabin,will remove the drive shaftshafts and check them too

daz1968

iTrader: (13)

I had incorrect oil in my rear diff and changed it to motul 90PA and it's much better, hardly makes any noise now. But are you sure it's diff as I previously had issues and it was pads loose in calipers, changed to a better pad and used brake grease and it stopped

ZANY

Here's a list before I got to the culprit bro: Rear top mounts, then all struts, arb and drop links, then the diff cradle bushes, then I took both shafts out the passenger hub side was gone pretty expensive do as all parts where bought brand new and genuine apart from the spec c struts and white line arb kit bought after all that it was better on gear changes felt a lot more tight worth it if your keeping the car

mhussein

I will check the pads

mhussein

Is there a guide on here how to remove the shafts,do I check for play in the cv joint to see if they are gone

Thanks

ZANY

Best thing is to check them while your changing your diff oil bro rule out the top mounts and struts first as the rear shocks are notorious for going easily

mhussein

Is it ok to use Millers 75 90 nt ls for the rear diff

just me

iTrader: (3)

I used motul 90 pa and the noise on my car turned out to be rear left strut.

BrownPantsRacing

iTrader: (6)

I'd go with rear strut noise too. Very common.

mhussein

Is it worth replacing them with std ones or better to go for coilovers

BrownPantsRacing

iTrader: (6)

My advice would be to only buy coilovers if you can afford good ones. Most of the average £600-£800 price versions won't last very well and will start knocking themselves after a while, coupled with the fact coilovers could spoil your ride for a road car.


My Impreza has OEM replacement rear shocks with lowering springs all round (and a few other suspension mods) and is a great car to drive on the road. Handles great and you can live with it every day.


My Forester STI had uprated struts, but I've just upgraded these to MeisterR coilovers and so far I'm very pleased indeed.

ZANY

I've just got rid of my tein coilovers bro not good for streets or motorway break your **** and back and the noises don't stop great on tracks and B roads I've gone for the blistein rb320 setup but looking out for some spec c items hopefully a lot smoother and the noises have gone

BrownPantsRacing

iTrader: (6)

Tein coilovers have very harsh spring rates and are known to be too stiff and unforgiving for UK roads.

jonnyboy82

iTrader: (10)

I have upgraded my standard widetrack suspension for the rb320 bilsteins with tein lowering spring and mine still clunks.

ZANY

I don't have any noises at all
SN member 2pot will be able to answer your question in detail mate but why did you replace the springs as they are allready lowered items made by eibach for prodrive when producing the setup for the rb320??

If you ever want rid of the blistein struts give me a shout I'll take them as spares to be refurbed

jonnyboy82

iTrader: (10)

That's how I bought them off Mattyb on here.

ZANY

If they are the silver/grey blisteins Get the original prodrive eibach springs guy sells them on eBay genuine prodrive brand new in the box @£110 delivered you'll be amazed how both springs and struts behave

jonnyboy82

iTrader: (10)

Tbh I have no complaints they were off a low mileage car so I'm very doubtful it's them!

just me

iTrader: (3)

Might be loose driveshaft to hub nuts.

mhussein

All sorted

It was the rear struts

Thanks everyone