Hi, thanks for your reply. Yep, judder through pedal and handbrake. I thought that would suggest a rear problem too but I havent touched the rear so I cant make sense of it. I'll change disks and pads on the rear on the weekend and update.

Thanks for replying. Haven't tried the old pads back in. I'll try that this weekend. Thought it must've been the calipers at first so inspected pistons and regreased the sliders and all good. Even replaced the clips that hold the pads in and no joy. I'll post again after I've tried the old pads.

I suspect the pads are binding in the calipers. Did you use HMP grease on all contact points?

How did you push back the calipers? Did you release the caliper bleed valves when doing it?

If the pads are binding the front brakes will be far less efficient , forcing the rears to do more work.. and if the roads are wet,maybe losing traction ,, hence triggering the ABS..

Did you replace all shims etc correctly?

Lastly, if the discs have an appreciable wear ridge then the new pads being flat faced may only be in contact with 10 - 25% of the disc until they wear to the shape of the disc, hence very poor braking and overheating of the contact points, gentle braking only until worn in, this is why unless my discs are perfect they get renewed when i fit new pads.

Discs have been changed too, GB - see OP's original

Thanks for all replies. Yeah, the disks have been done to. I didn't open the bleed nipple when pushing pistons back in. I used a piston tool to do it. I've also had the pistons out and they're moving freely. No rust. I might try adding some red grease to them cause I didn't do that. The pads and shims were fitted correctly with new shims. In terms of how the pads fit in, all poi ts here greased but I wouldn't say they glide in. Maybe a little stiff to get in. Used Pagid pads.

I'll swap with old pads and if that solves I'll buy better quality pads. Any recommendations? I'll update on weekend.

I've used Pagid pads and had judder problems. The anti squeal pads they used to fit were terrible. So poor in fact that Pagid started to sell metal shims.

I solved mine by removing the pads, cleaning and re-greasing a couple of times, and it just stopped.

Well its now sorted. The problem was one of the rear disks was ruined. Just the back side of it tho so didn't notice. No idea how just doing the front caused the judder.

No, I don't see how changing just the front pads could trigger the problem either. There must be some explanation ....

Well its now sorted. The problem was one of the rear disks was ruined. Just the back side of it tho so didn't notice. No idea how just doing the front caused the judder but it's now fixed and I'm happy. f*** knows how it passed the last MOT though. I guess they didn't look.

Thanks for all your replies. Much appreciated.

When you first changed pads you kept the old discs on, so due to wear ridges on the old discs front braking effort was reduced, hence more pedal pressure to stop which maybe caused a slightly sticking rear pad (the ruined disc surface?) to unstick and make contact...well that's my theory anyway :-)

Many thanks for bringing the thread up to date, too many don't bother sadly.