zm2389

Hi all

I'm very new to the forum and have a big annoying problem

i recently purchased a 2006 Hawkeye sti

now to my problem

when the diff control is on auto or any other position apart from the very bottom it makes a very bad knock/judder worse than the normal expectable one

any ideas on what it could be ... I'm sure its been covered before but i have spent hours searching online and not found a proper answer

help please

**jay**

iTrader: (1)

Are all your tyres nearlly the same depth ie have you got a single newish tyre on an axle, this can play havoc with the diffs hence why tyres are best replaced all together on these cars.
You will get a little noise though in tight corners i used to pull the hand brake up one notch in tight parking situation(this puts the diff into open mode)
Check your tyres mate and change the diff and gearbox oils to rule out incorrect oils.
Jay

zm2389

thanks .. i think i may have to try the oil change first and check to see if i have any metal bits coming out with the diff oil ...

what are the recommended / best oil to put int the diff and gearbox

i got good knowledge of cars but I'm such a noob with scoobys just come over from the german side

**jay**

iTrader: (1)

Could be the wrong grade of oil.
I use a 90pa oil in the rear diff and motul 300 in the gearbox and always had no issues

http://www.opieoils.co.uk/p-899-motu...-diff-oil.aspx Need about 4l dont use that in the rear diff though as its a plated diff
And rear diff 800mil
http://www.opieoils.co.uk/p-888-motu...-pressure.aspx

zm2389

thanks a lot

will be changing all oils and tyres on monday see how it goes...