What were you doing when it let go? A 10 second pass, or just putzing around town?
Unless you were stressing the trans heavily, Bison has likey got the answer. (I think you can yank a cooler line to see if the pump is still working, but that is from an aging memory of something read, not experience). The stock pump uses a couple of cast iron rings, which break when they decide it is time. Hardened steel replacements cure that little problem, but chances are you will need a pump at this point.
Check out Bruces sticky- Strengthening the 2004R- for things that go away under stress.
Chris has a good manual out on rebuilds and mods (phone CKPerformance if interested).
HTH