Are you leaking at the by tube there on theside of the block near the turbo? Lots of trucks leak right there during the cold weather. My truck was the same as yours, nary a drop in summer, but come winter the tank level is just dropping. What happens is the hose and clamps expand with heat and stay that way through the hot summer. Then when it gets cold the lines and fittings contract much more than in the summer time. The hose and clamps don't contract as much and then the truck leaks. You'll get a puddle right under the bellhousing. It'll get all over and make you think your tranny seal is the culprit, but it isn't. It is the antifreeze leaking down the block to the housing then the ground. Worth a look.

The other trouble spot is the little overflow tube at the top of the radiator. I put a clamp there and that took care of that little leak.

 

Guess i`ll fill the bottle and keep an eye on it now.

 

Good stuff!!!!! thanks guys!!!