Ginger Ale Roast Beef

Sounds weird, I know. But it was delicious, I promise. It made it's own really yummy gravy too. I served it with mashed potatoes.

1 3 pound beef roast
1/2 C flour
1 envelope dry onion soup mix
1 envelope dry brown gravy mix
2 C ginger ale

Coat the roast with flour. Reserve any flour that doesn't stick to the roast. Place roast in crock pot. Combine dry soup mix, gravy mix, remaining flour and ginger ale. Mix well. Pour sauce over roast. Cook on Low for 8-10 hours or until roast is tender.