I have a Mastercraft (Canadian Tire Brand), small torque wrench measuring in inch-lbs. It's been in storage in my garage for over 10 years. I wanted to use it for my drain plug in my aluminum transfer case. It has a plastic lock ring to unlock it, but the ring seems seized into position and I can't unlock the tool to change the torque setting. Any ideas on how to get the ring to move, such as soaking the tool etc?
Thanks
SF