Hey guys!

I have a 98 Burb, K1500. Fron diff is leaking from what appears to be the front driver's side.

Quoted 4 hours labour and $30 for a seal.

Can't afford the down time or the bill at the moment. I assume the diff is dry as I'm getting a groaning noise from the front. (even with 4x4 off)

First off, any tips to do this myself??

Second, to keep from killing the diff, can I top off more gear oil from the breather tube?? Getting under there to add oil every time can be a pain!