Good to read thanks!
I have vibration when gaining speed in 4 and 5 gear. The right disc is warped, but suspect the caliper to be seized as the vibration does not occur when discs are cold.
But makes you wonder...if the previous owner had replaced the bearing but not deadsquare, and that is the origin of warped disc..
Also tempted to mount everything on the new hub even if it aint broken; have new SKF bearings also laying around. Did that on my Touran; all 4 bearings and discs/pads even if just one bearing and front discs were finito. But the Touran was 11 years/110kmiles with factory bearings/brakes, so just replaced everything in one go to avoid doing the job again in short time. The Touran was transformed with 4 new bearings and brakes; now I can easily push it with one finger only, and brakes are instant. The A2 is like sirup in comparison, and brakes a joke.
I fitted FAG bearings all round, along with brand new calipers, discs, disc guards, pads, braided hoses, inner and outer CV joints, JDD gearbox (second-hand), dogbone, Dieselgeek bushes/sliders throughout, ABS sensors, brake pad wear sensor wiring, springs, dampers, top mounts/turntables, droplinks, ARB bushes, wishbones, bushes, nuts, bolts & tyres. In other words, pretty much everything. Reading several of the threads about repeated warped disc problems, I think a lot of it is caused by badly-seated wheel bearings, so just replacing the discs is doomed to failure from the moment they are fitted. I was apprehensive about the Bugiad uprights because they were (still are?) a bargain from Autodoc, but from running my verniers over them and comparing the measurements to the old uprights, they are a very good match. They also carry the VAG part number as part of the forging (it's not even ground off) so that boded well as soon as I took them out of the box. The main reason I replaced them was that the threads for the brake slider pins on the old ones were completely shot - someone had obviously cross-threaded them in the past. I took some video of the built-up uprights on the bench with a dial indicator to show run-out, but I can't work out how to upload video on here.
Subjectively, rolling resistance feels very low now. Getting a 'tow' off HGV's on the motorway is easy
. This year is ear-marked for engine maintenance jobs. If only I knew how to give the A2 a ride quality worthy of the name rather than something from a horse cart. It ruins the car. Our Citigo runs on what is notionally a very similar set-up and its ride quality is in a different league. As a result, it's a much, much nicer car to drive. I suspect it to be the dampers, as the spring specs for the two cars are very similar.