2013 Hyundai Santa Fe Sport is losing gas milage due to constant acceleration

What is your question?

My 2013 Hyundai Santa Fe Sport recently had a visit to the shop. It needed the 4wd coupler replaced. At the time it was jumping when accelerating but it would act like a normal vehicle when you got up to a certain speed (60mph). Now that I got my car out of the shop, I have to constantly push the accelerator to move the vehicle. And what I mean is that even on the interstate going about 70mph, when I come to a steep hill and let off the gas, instead of the normal coasting, my car starts to slow way down. The hill assist is not turned on, but that is what it feels like. What can be the issue?

What makes this problem better or worse?

Nothing seems to make it better or worse. It is just an on going issue.

How long has your 2013 Hyundai Santa Fe had this problem?

I've had this problem about 2 months since getting it out of the shop at the dealership.