I've been suffering from brake judder on my 2003 Monaro CV6 (Chevrolet Lumina Coupe S as it's known here in the Middle East) and searching on here I've seen all sorts of conflicting advice on what causes it. I've seen discs, pads, bushes and even "not tightening the wheel nuts in the correct order" as causes.

I've changed the pads, checked the bushes, cleaned the rust off the discs and hubs and so on but to no avail. So I decided to try replacing the discs and had myself braced for a hefty bill.

I found a decent looking GM specialist in the local industrial area and asked how much new discs would cost - and given that they are AUD150 (£100) each in the UK, I was ready for bad news. Imagine my surprise when the chap told me that they were 130 Dirhams each - about AUD35 (less than £23 each). So I bought them - along with an oil filter, a set of 6 Holden branded Denso spark plugs, and 5 litres of oil and the whole lot came in at £64! I later bought an auxiliary drive belt for about AUD30, too. All the parts are genuine GM/Holden apart from the discs themselves.

So I changed the discs a couple of weeks back and the judder has completely gone. I did the spark plugs, too, but left the oil, filter and belt change for another day (it was too warm outside at 38C). The old discs didn't look too bad but one or both must have had some sort of flaw in it - and they were GM branded ones, too. The replacements are "Raybestos" brand which is obviously a well known American brand so I'm happy with what I fitted.

There's something rather pleasing about the look of new discs.





So there it was, the old classic problem of warped/distorted/non-parallel discs.

I also replaced the boot and bonnet struts with upgraded GM branded items - now I can get my toolbox out of the boot without suffering brain damage!