When is the last time you had it serviced. It could be Time to
replace the seal. Good Luck and Remember.
Change Your Mind, Not Your Oil.
Use the First In Synthetic Motor Oil's.
See My Bio For Information & Contact Details. How many miles on the vehicle? It could be a simple matter of retorquing the pan bolts. Just make sure NOT to overtorque them--find the torque values first. One down-side to trying this is the fact that the possibility of the seal already having had fluid passing by it, in which case it would be back to time to replace the seal...