The Differential Lock won't release [NOT A BUG]

[phaines05]

The Differential Lock won't release when pressing the V key. Can still drive truck but takes a while to pick up speed, more so when going up hill, it also does damage to the truck over time.

[Loutis]

I tried it, works fine, there are no restrictions as to when you can unlock the differential lock, there is a speed restriction when you try to lock it, that is.. you can't go above certain speed in order to lock the differential.

Make sure you have everything set correctly (keybindings, etc) and try again