If I'm guessing right, your drill is a 3/8th incher. They typically lack the torque of a 1/2 inch. I've been watching this thread with great interest. Last summer I had occasion to use my trailer to haul home my Town & Country mini-van because the starter wouldn't engage (corroded terminal as it turned out). I'd lost the crank for the winch so I ended up using an open-end wrench a quarter turn at a time to load that heavy beast! A 1/2 inch cordless drill may not have been enough muscle even on the geared down drive I used the wrench on. I'm wondering how a heavy duty impact wrench might serve.