Turbo or what

[maki1]

Dealership replaced turbo two weeks ago. The first week back it blew white smoke then heavy black smoke, no power, then as quick as it happened it cleared up. The turbo has a very high pitch wine to it. We were hauling a goose neck with a bobcat home tonight and it did it again, but this time we had to tow it home, Same thing happened, very little boost, and no power. We just did a pm on it everything was fine, we are having to add antifreeze at every pm,it was low tonight.