How do I know if a sub frame is bent? Lower control arm bushing is cracked.

get a four wheel alighnment it should say if its off and by how much and then you should then know what to do

Hard to see with by eye. Usally if something is bent it will show up on a alignment rack. Some of the angles that are not adjustable like set back, toe out on turns, thrust angles, and center line will be out of wack. If a alignment specilist cannot get your caster, camber setting in a acceptable range it may indicate something is bent. We commonly run into a bent steering knuckle in a case like you discribe. Not nessasarly a bent sub frame.

Have a 2000 Ford Taurus and replaced both ball joints, control arms, axles and struts. Also, added Moog K8909 camber plates and set them to +1.4 on each side. Now the RH camber is -1.5 and the LH camber is -1.3. Why is the camber so negative after replacing all these parts and adding the camber plates? Before adding the camber plates the RH was -2.8 and the LH was -2.0.