As noted above, your problem is the steering lock, not the tumbler. The grinding referred to doesn't correct the problem, it just gets the lock out. You then have to remove the guts of the lock, which is sort of like undoing one of those trick puzzles. Do not attempt to salvage any part of the lock, just remove the guts and reinstall the housing and you'll be good to go sans steering lock. The pin you have to grind off is recessed and hardened; you will need a Dremel tool and small grinding point. It's tedious but doable. Search for the procedure, it is posted. Good luck