jammy Posted May 23, 2018 Report Share Posted May 23, 2018 So I got round to fitting back on the wheels that came with the signum to hopefully iradicate the left pull..well its cured 80 percent of the pulling and also stopped the cat from being so twitchy over bumps.. Anyway I had the fronts rebalanced as it was shaking around 65 to 75mph.that was done and no more shaking ( infact it was a very smooth drive,but upon braking from such speed there was a violent shake from the front under hard braking.. After this came to light the car started to shake again like before balancing was done,but now no shaking under braking? Never did this at all with the other wheels on during braking or a steady drive at 70 mph, nor did it shake under braking. Replacement wheels are fine with no flat spots or buckles or any defects in the tyres Your thoughts please... Quote Link to comment Share on other sites More sharing options...
Tony Posted May 23, 2018 Report Share Posted May 23, 2018 Do the current wheels need spigot rings? .... On the brake side of things it suggests a binding caliper. Quote Link to comment Share on other sites More sharing options...
jammy Posted May 24, 2018 Author Report Share Posted May 24, 2018 Yes they do and yes the have them fitted..I'll take a look and see if any weights have come off.. Sticky caliper is possible I guess due to being parked up for a couple of weeks.just being parked up over night in my road can make the brakes stick on as it is. Joys of a seaside town 😅 Quote Link to comment Share on other sites More sharing options...
Tony Posted May 24, 2018 Report Share Posted May 24, 2018 The problem has been isolated since it's only under braking.. So you are looking for seized caliper/ slider/ pad in the carrier or bushing under load like control arm/ wishbone. Point to note there no point checking cold brakes because once cooled there probably isn't a bind.. Do some mileage and then test. Quote Link to comment Share on other sites More sharing options...
NickT Posted May 25, 2018 Report Share Posted May 25, 2018 If it helps, I've just done Mr front discs and pads on my vectra and the breaking vibration problem was caliper corrosion under the rubber sliders. Pop the sliders out carefully with blunt end so not to damage then, use a fennel or ruled up coarse sandpaper and clean out the corrosion so the hole is circular again. The sliders should go straight back in and once settled in place the slider pin should move smoothly in and out of it. Also consider measuring the disc runout and flange runout too. Good luck Quote Link to comment Share on other sites More sharing options...
jammy Posted May 25, 2018 Author Report Share Posted May 25, 2018 Cheers mate..I went back to have the balancing checked and a weight had fallen off....I do have a sticky rear caliper that much I do know..handbrake related, Quote Link to comment Share on other sites More sharing options...
NickT Posted May 25, 2018 Report Share Posted May 25, 2018 I meant to put braking, not breaking. Stupid phone auto correct ball locks. . Quote Link to comment Share on other sites More sharing options...
Tony Posted May 25, 2018 Report Share Posted May 25, 2018 I meant to put braking, not breaking. Stupid phone auto correct ball locks. . .......Yo Nick whereya been Quote Link to comment Share on other sites More sharing options...
NickT Posted May 25, 2018 Report Share Posted May 25, 2018 Hello Tony, I got a new job last October and this last 3 months I've been working at various places not getting home till late. Also trying to catch up on jobs on my cars and house Quote Link to comment Share on other sites More sharing options...
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