I did some research on here and mk8 boards, and it seems ball joints are implicated in brake pulls. However, I'm wondering if a ball joint that passes a wiggle test can still cause issues.
Assume the base brake system is ok, new hoses, relatively new calipers, equal heat on both rotors during braking, good bleed and pedal. etc
Don't implicate the ABS or M/C, they were changed recently because of rust and maintenance, didn't make a difference.. THe brake issue existed before and after the brake work.
I understand that the brakes can pull because of bad suspension parts. On my 95 I have new UCAs, but amazingly what i believe are the original ball joints(or ones with at least 130K on them), they seem tight when I wiggle the wheel with the LCA supported or unsupported. I'm thinking though they could be binding or rusting internally, there is no front end noise either.
If i touch the brake pedal at a very slow speed (or even backing up), the steering wheel will turn very quickly to the left, maybe an inch or so, almost like a twitch, and then kind of recover most of the way back.
When I stop at moderate speed, there is (I'll say almost intermittent or speed/effort dependent) left pull, but it seems to even out with a bit more pedal effort. Sometimes it is pretty bad and sometimes it stops arrow straight. I think I have a slight right drift alignment issue, but I had it before with no brake issue.
I'm wondering if anyone else experienced this, I could probably do things like switch rotor and friction material side, but I'm wondering if LCAs that seem ok with testing can still be bad. I hate to change out good parts, and then find its really something else.
Also, it seems advance auto is out of the TRW SC control arms. Someone on another mk8 board recently got a set though
. I should have bought 4 when I did my 91 !