Problem with steering help!!

[btsclan]

I replaced my worn out rack and pinion today which fixed 80% of my wobbly and non accurate steering wheel but theres another problem, when ever I drive over a bump at speeds over 40mph the car tends to get loose by way of listing right and left until I counter steer, At speeds with no bumps it flys as straight as an arrow but once a bump comes along it feels like the car doesnt want to keep going straight?? Could it be worn out stabilizer bar links or something loose in the suspension? I know my ball joint isnts too good, could it be the ball joint? Any help would be great, thanks

 

[slow5poh]

I think what you are describing may be 'bumpsteer". I have heard when you lower your car you have to get new special balljoints or tie rod ends to fix that problem. I am not sure but maybe this is your problem as well. I don't know if you have lowered your mustang.

 

[slow5poh]

you might check out Steeda's website i think it talks about it on there.