Should have a dipstick, on the drivers side of the engine compartment near the firewall. Yellow handle, it's mounted kind of low. A drain and fill on a typical 4EAT is about 4 quarts, is there any fluid registering on the stick? You could have lost a quart or 7 quarts if the cooler line let go completely. If nothing registers on the stick with the engine off, add a quart at a time until it reads somewhere between the full cold and full hot marks. Then start the engine, shift it through the ranges a couple times, and check the fluid again with the engine idling and up to temp. Adjust fluid level as necessary.