I recently purchased a 2007 Limited with 100K miles. The front end sits lower than our previous 2007 XLT. I measured the Limited's front wheel opening and found it to be 33 1/2" high. I measured my neighbors Expedition, and his front wheel opening is 35 1/2" high. What could be causing my Limited to sag so much? Also, could anyone tell me if there are any major engine/drivetrain/suspension differences between the Limited model and other models?

