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Would part of the rear camber issue be from being lowered?

Lowering a vehicle with a multi-link "A" arm type suspension does cause negative camber that can be corrected on some vehicles. The "uneven" arms alleviate some of it, but not all. They even sell "camber" kits for some imports that will correct the camber for lowered vehicles. For us Mark owners, we either have to live with it or do some "customizing". This would probably grinding/modifying the camber adjustment ring to allow for more adjustment.
 
he said the amount my car is lowered is not enough to make the alignment not possible to perform.

Incorrect.

This is why the factory set strict limits on how much the car can be lowered via height sensor; exceed the lowering height by modifying the sensors WILL lead to an out-of-spec camber that can't be fully corrected. But again, the camber would be default to a "sport" setting when the car is lowered.
 
I understand, toe, caster and camber, but what is thrust angle and why would a negative thrust angle be illegal?
 
I understand, toe, caster and camber, but what is thrust angle and why would a negative thrust angle be illegal?

Positive thrust angles are required from the manufacturer as a safety measure. If a driver were to fall asleep (or become otherwise incapacitated) at the wheel, the vehicle would most likely drift off to the side of the road rather than into oncoming traffic. If your alignment is done correctly, your car should drift to the right ever so slightly when you take your hands off the wheel. The slight "crown" in the road's profile also helps to pull cars to the right.
 
Wayne,

Thanks for that info. The last alignment performed on my Mark was done by a reputable FLM guy, but I always wondered why the car drifted to the right ever so slightly even on roads with no crown. If that's true, then it makes perfect sense. Thanks.
 
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