Akebono + RDA discs - shudder

**DiscoJeffster** · 3rd August 2023, 08:57 PM

I was about to write about how disappointed I am that my Akebono now shudder on my RDA discs, which I am, but interestingly it was 50,000km and 2 1/2 years since I fitted them. I’m confident it’s the discs not arms as the arms are near new.

Anyhow, I’m going to skim the discs and see how it goes from there.

**BradC** · 3rd August 2023, 09:42 PM

Before you skim them, why not put a dial indicator on them to see if there is any measurable runout?

**DiscoJeffster** · 4th August 2023, 05:45 AM

Originally Posted by BradC

Before you skim them, why not put a dial indicator on them to see if there is any measurable runout?

Because I don’t have one anymore so I’ll take the easy route

**DiscoJeffster** · 5th August 2023, 12:24 PM

Decided I’d just buy a new pair of discs as they’re 25% off at Sparesbox at the moment, will swap them over and then get this pair skimmed for future needs.

josh.huber · 5th August 2023, 05:32 PM

Then call me and say I told you so. It'll happen again.

Genuine all the way.

Mine got a shudder. I rebuilt the whole car.. No change. Changed the Pads fixed. I'd rather clean my wheels then my bank account out

**veebs** · 5th August 2023, 05:47 PM

Originally Posted by josh.huber

Then call me and say I told you so. It'll happen again.

Genuine all the way.

Mine got a shudder. I rebuilt the whole car.. No change. Changed the Pads fixed. I'd rather clean my wheels then my bank account out

My Genuines were shuddering all over the place, changed the pads out to Akebono, shudder gone.

Put a wild thought out there - are the brakes over specced for the weight of the car, and so don't get hot enough to burn off impurities?

**DiscoJeffster** · 5th August 2023, 06:15 PM

Now I have a second set of discs I’ll just swap discs each year when I do my oil change. That’ll sort it Josh

**Eric SDV6SE** · 5th August 2023, 11:28 PM

Have you checked calipers and brake pistons? A sticky piston will wear rotors un evenly When I did mine I put new rotors, pads and lines plus a full seal kit through the calipers. Genuine rotors are too soft imho.

josh.huber · 6th August 2023, 06:10 AM

Originally Posted by josh.huber

Then call me and say I told you so. It'll happen again.

Genuine all the way.

Mine got a shudder. I rebuilt the whole car.. No change. Changed the Pads fixed. I'd rather clean my wheels then my bank account out

This post is connected to a chat we had prior to this thread.

josh.huber · 6th August 2023, 06:16 AM

Originally Posted by veebs

My Genuines were shuddering all over the place, changed the pads out to Akebono, shudder gone.

Put a wild thought out there - are the brakes over specced for the weight of the car, and so don't get hot enough to burn off impurities?

My Little theory is that it's the inner pad that causes it. Because it would get better after washing the wheels.. Can't wash the inside of the disc because of the backing plate.

I reckon the ceremic leave some sort of residue which builds up on the rotor, affecting the friction during the braking events. I swapped out for Bosch ceremic and had the same issue.. Zero mechanical work done. Genuine pads back on.. Problem solved..

I got great wear from the akebono, didn't have much else go wrong but a shudder, the new pads feel better, but that could be the placebo effect too.

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