Leaking pumpkin

[mic_1011]

I LOOKED UNDERNEATH MY EXPEDITION AND NOTICED THAT THAT BIG ROUND THING THAT'S IN BETWEEN THE REAR AXLES ((I CALL IT THE PUMPKIN) WHAT IS THAT THE REAR DIFF?) IS COVERED IN WET GREASE OR OIL. MAINLY THE BOTTOM HALF. IS THIS A MAJOR PROBLEM, SHOULD I JUST DRAIN IT AND REFILL IT? ANY SUGGESTIONS ARE APPRECIATED.

 

[Stoned06]

Sounds like your diff cover is leaking. One other possible explanation is the vent tube may have spit a little diff oil out and it ran down and is dripping off. I would try to find out where it is coming from by cleaning it off and determining the source when it start leaking again.
If it is the cover, I would drain the diff and remove the cover. Use a liquid gasket material like an RTV sealant as the gasket and reinstall the cover and you should be good to go.

 

[KWT2000]

also could be the rear pinion seal is leaking

 

[Spoon-Man]

Same thing happend to me. Drained it and put a new gasket on and mine was fixed.

 

[mic_1011]

thanks. i will give it a shot