Hi , we hv a xc90 2006.
Since last two weeks when we put the car in reverse , it makes a groaning sound and doesn't budge. This doesn't happen first thing in the morning when car is cold but happens after the car has been driven 15 to 20 minutes.

There are no issues in the forward gear.

We had the car flushed, all fluids but this issue doesn't seem to hv been resolved

Can anyone provide any input. It has 60000 miles on it


Thank u