Having some problems diagnosing a problem with my 1200 Coupe.
At highway speeds it seems to tramline over bumps and i have to counter steer to correct it and back off speed.
I adjusted the steering box, replaced sway bar rubbers, replaced castor rods and halved them to give more castor and also checked the wheel alignment (drive way job)

I cant find any movement in ball joint bearings or any steering linkages.
only movement i can find is when on jacks i can move the wheel up and down on the strut and 1/2 inch with out resistance.





What does the bound bumper do? Could this be the cause?