hi everyone I'm a newbie. I have a 2009 bx 25 and im noticing my front axle leaking. appears to be drivers side where it goes from horizontal to vertical. it is definitely low on oil and when I take the cap off there seems to be air trapped in. I've noticed this has been ongoing for the last few years. sometimes I would see a leak and other times there isn't. so if its a seal, is it a big job to repair?