Cadillac CTS Differential

Today, My Manifold Broke As I Was Driving Down The Highway. The Exhaust Is Extremely Loud And Obviously Needs To Be Replaced Or Fixed. I...

On This Car, If The Differential Is Worn Out.. Will It Create Excessive Tire Wear ??? I Really Need To Know ..... Please ?

I Was Getting My Tires Rotated And When I Removed The Right Rear Tire There Was A Large Bolt That Had Come Unscrewed And Was In The Center...