checked the wishbone as suggested can see nothing wrong with them so I'm thinking abs rings on the hubs as it only happens when the abs is working If an ABS valve were playing up, you should get (a) the ABS warning light coming on on the dashboard, and (b) a stored fault code. I know this 'cos I to...

checked the wishbone as suggested can see nothing wrong with them so I'm thinking abs rings on the hubs as it only happens when the abs is working

under light braking the car pulls straight & true however under heavy braking my car pulls sharply to the left then right then left then right again until the car stops or I let up on the brake,
Im suspecting its an ABS issue, has anyone experienced similar?

car is a 1992 4.0