Differential leak maybe

[zomotropin]

i recently changed the rear differential fluid in my truck. now i am noticing a little build up of oil at the base. i have never changed the fluid before so i am not sure if this is normal. any thoughts would be appreciated. thanks!

[joe]

Leaks aren't normal. Clean it up and you should be able to see if it's leaking from the plugs, gasket or pinion seal.