Hi,
So far I have changed the 2 front wheel bearings, and some other stuff and although it tightened up the steering it never solved the issue.
The other day i had a 4 wheel alignment done, the 2 rear wheels where pointing to the right, so the car was been pushed to the side instead of straight forward.
I also refurnished the rear callipers and for the first time in 4-5 weeks i have had no issues what so ever!
Let me know how you get on though, points to check first are your wheels, jack them up and give them a spin, check the callipers and shake the wheel to ensure there is no play what-so-ever. then get your 4 point tracking done. the front will never be inline if the rear are out.
Good luck and keep us posted!