I had a similar problem on my BX2350. The problem for me is that you cannot grease the original ball joints. Then I pulled out the cutter pins and unsrewded the nuts under both tie rod ends :they were really loose. Just pulled out the tie rod by lifting them and found that they were dry and dusty! I cleaned them with air,drilled a hole on top of each,tapped in and installed a small zirt ( make sure to blow out all metal residue before).Reinstalled the tie rods back in place ,tightening the nuts,then loosening them ½ a turn and made sure that everything was moving free,locked with the cutter pin ,and pumped grease in the zirts until I could see it coming out. I know I drive my tractor hard,cleaning snow in driveways and landscaping, but regular greasing and maintenance is important.