Ntty1

I have a 2015 Ford edge 3.5 L SEL my wife was driving it she had a smell in the car the Awd light lit up she bring it home. I replaced the PUC gearbox still doing the same thing. Feels like the car is in four-wheel-drive. When you turn left or right the back wheel feel like its skidding along the ground. Feels like the car is holding back like the wheels ain’t in sync with each other. can somebody help? Feels like somethings holding back. Brakes are free. I put the car up on a lift will spin freely. I’m wondering if it’s the gearbox in the rear car