Knocking on rear

[MrsSTAN]

X3 2.0d msport 2007
Just to say what I’ve done first - brand new Star rated Dunlop approved tyres x 4 matching , tracked 3D wheel alignment.camber angle done , prop shaft bushings , new coil springs, shaft , new Luk clutch including dual mass full kit. Exhaust mounts .

Issue only happens in 1st & 2nd and reverse very slow speed .example slowing to pull onto a kerb when car is still in gear and then u get like a clunk can be felt even more sat in rear seat . Can only describe it as if there’s slack in rear wheels hard to describe.no vibration on high speed or gear stick or under hard acceleration from standstill

Thanks any advise would be great