Diff Oil Leak - Culprits?

[Andy JB]

So my GKN diff appears to have an oil leak - not a serious one but potentially one to leak enough between oil change services to drop the level - most noticeable after run when oil is warmn rather than dripping when cold.

So what are the likley culprits for the diff and what sort of costs would you expect - have check fill/drain tightness & not obvious where is coming from.

[rigga]

Pinion seal, drive shaft seals, end cover gasket ..... think that covers it

Blocked breather might be the root cause though.

[JPW231]

As stated, if you've recently changed the oil it could be the breather just finding its level.