Originally Posted by jlewissystem
Differential leaking is typically the gasket, which will be replaced (in some manor) when changing the fluid (servicing)
As i stated on a WK yes but on the JK there is a drain and fill plug on the housing and cover respectively... there are some that dont even remove the cover on the WK such as spiffy lube, they suck and fill NEVER pop the cover, I am VERY curious how much fluid they actually get out (not that they care).
300 is pretty steep for a front and rear diff service but if they are talking replacing a seal too then it makes sence.
Honestly, I would look at the cover, I work with some guys that list moist looking covers as "leaking"... I am more of a 15k service or accumulating fluid means its leaking.