In a large bowl, combine the beef broth, beefy onion soup mix, cream of mushroom soup, and garlic cloves. Set aside.
Place the roast in a 5-quart (or larger) slow cooker. Add the soup mixture. Cover and cook for 8 hours or overnight on LOW, or until the beef shreds easily.
In the morning, break beef apart and add 6 -8 cups of beef broth or water. Cover and continue to cook an additional 8 hours on LOW.
An hour before you eat, add egg noodles, salt and pepper. Cover and cook for an additional hour on HIGH or until noodles are tender.
