I changed a stock steering arm tonight to install a raised steering arm. I did not use any WD-40, or any penetrating sprays. The arm and axle were off a 79 3/4 ton and I just took the nuts off and used a BFH and gave it three good, hard hits. The arm and cones broke loose and then used Channel Locks to get the cones out. Then installed the new raised arm and torqued it down to specs. Total time: 15 minutes. Now is this a record or what? The stock steering arm has never been messed with because the axle came off a farm truck.