Loud thunk from parked to reverse only in freezing temps
I have seen other threads about clanking, clunking or thunking when changing gears but I haven't seen what's happening to my Ranger - when it is cold (like freezing) and I am leaving for work in the morning (for example), when I put it in reverse (it is an automatic), it will not move. When I give it a little bit of gas (and more until it moves) it will make a LOUD thunk/clunk noise and go in reverse.
It "feels" like it is stuck or bound up (or literally frozen?) It's a really loud sound - I don't know how bad the problem is, but it sure sounds bad.
It will not make any more noise as I go from then on. I have not ever experienced this when it was warm out. I do not experience this at all as it later is changing gears, nor later in the day when I am leaving work. It has only happened when starting out on a very cold morning.