Warped discs ? Rx 300.

[Calders]

Borrowed my mums rx 300 (2006) at the weekend , needed to transport some stuff from London to Devon and there was no way it was fitting in my ls 460,  noticed straight away on motorway a real bad brake judder/pulsating as soon as I braked over 50 mph, my first thought was warped disks or disk which I planned on changing this weekend, do you guys think this is the most obvious or maybe something different ie suspension bushes etc, many thanks!!

[sorcerer]

Well I'm no mechanic so take from this what you will, but many moons ago when I used to enjoy working on my cars, warped or worn discs would always be the first thing I thought of if I ever experienced any brake judder, so in the absence of any more knowledgable replies I'd say yes, you're right.

[steve2006]

What happens when braking under 50 MPH?

As above I would be looking at discs 1st but also sticking/seized  callipers could have the same effect.

[ChrisKaye]

If the discs haven't been changed in Donkey's then I'd do that for sure, whilst you've got everything apart, servicing the calipers & slide pins would be massively worth the effort!

When I did mine (and replaced the pads, too) one of the front pads was cheese wedge shaped from uneven wear from a sticking slide pin!

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