It CAN do it! On the right car…
Surprisingly this car (2002 Oldsmobile Aurora) had a very low torque spec spindle nut. I think it was ~134ft/lbs. It was taking forever but it DID it. Eventually though I gave it a rest and finished with a breaker bar. While it was CAPABLE, it was really slow and shaking like crazy!
The deal at Home Depot for it is still ongoing! Grab it with a free M12 ratchet:
http://www.homedepot.com/p/Milwaukee-M12-FUEL-12-Volt-Lithium-Ion-Brushless-3-8-in-Cordless-Impact-Wrench-Kit-with-M12-3-8-in-Ratchet-Tool-Only-2454-22-2457-20/205044520
I think I may be creating some pages in the future with repair information on this car as I couldn’t really find anything when I was searching. Maybe I can save someone else some grief in the future.