Brake judder

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Robster

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Hello, I've just joined and would like to ask for help with a braking problem on my 2008 Nissan Navara D40. So I've had this brake judder problem for ages now and have put on new discs, pads and calliper sliders. I cleaned the stainless steel clips in the calliper that the pads rest in. When I did the pads the pistons in both callipers were moving in and out so they seem ok but the problem, vibration you can feel through the steering wheel on braking is still there! I'm sort of at the stage where I'm thinking about buying new discs & pads again to see if it cures it!! Maybe I've missed something! I'm going to visually check all the suspension joints but it went through the MOT last June and nothing was wrong then. Any help would be greatly appreciated, thanks Rob
 
The MOT (assuming the UK here) may not inspect enough of the suspension to reveal a problem, but the problem may not be in the suspension.

I would suggest getting in touch with someone that can accurately measure any deflection in the disc while it is on the car. There's a chance that the disc isn't sitting perfectly against the hub (debris?) and under significant loads (moderate+ braking) the deflection is making itself known.

I was reading some posts (on a motorcycling forum, but their disc brakes work just the same as ours) and a few guys had disassembled their calipers and completely cleaned them, polished the pistons and the guides, used a dry lubricant (I don't recall any difference between Silicone Lube or Graphite powder) on the pistons and reinstalled. The result was much better responsiveness and braking performance.

It's something I'll be doing on my car (and bike) in the near future.
 
Thanks Tony, I'll jack it up again and have a look at all the joints then the discs. Bloomin' annoying I can tell you! When I did the pads the other day it was a bit better but still there, so the investigation continues!
 
i had same prob with a falcon i owned , on dissmantling the pads i found one to be more worn than the other , that piston wasnt retreating enough , had to fit new rubber rings around the pistons they are supposed to be square section the old ones showed sign of rounding off and were fouled up they werent doing there job of pulling the piston back far enough causing contact all the time
 
the rubber piston rings is what actually pulls the piston back. be careful with lubing the cylinder, the rubber rings need to grab the cylinder.
 

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