I had a shop replace the rear ring and pinion, also the left half shaft upfront they also replaced front wheel bearings an disk brakes.....when they test drive it the said they had to reverse I to get it out of 4x4 and claimed that was " normal". I said I had never needed to do that. When I tested it it feels like the front axles are not working together and get a strong pull in the steering. When I lifted the front and roll the front wheel there is a significant uneven "hard spot"...right front wheel rolled smooth and easy. Could anything they did mess up my front diff? Also when I roll the front left wheel I can see the entire front diff move up and down a whopping 4 to 5 inches. HELP! #shouldnevertakestinkytoashop