Hi, My name is Paul & I will try to assist you.
If you are 100% sure that the brake discs are ok then I would be checking both lower arm ball joints & bushes for wear & movement
Worn shock absorbers are also a possibility
By far the biggest problem we see is with the brake discs & it may not be that obvious on initial inspection - check for any pad shadows on both faces of the disc & inspect with a DTI for runout on both faces of the disc.
We replace many discs for this problem so unless you have already fitted new discs I would not rule the discs out at this stage
Best regards, Paul
I have replaced discs
ok - as said I would next look at the lower suspension arm joints & bushes
the joints can wear giving excess movement & the bushes are prone to splitting or separating - give them a good lever with a pry bar to check
thanks for your reply will check all joints
no problem, let me know how you get on
best regards, Paul