I bought my brand new Jeep on March 31, and there is already rust on the rear diff. cover, because the black paint is falling down...

I installed a Rancho cover on the front diff. and I think I will have to do the same thing on the rear one. I could also sand it and repaint it...

 

surface rust on a diff cover is pretty normal - annoying but normal. you can always knock off the loose paint with a scotchbrite pad and then hit it with some rustolium.

 

X's 2 just paint it or throw on a matching rear diff cover.

 

I was very dissappointed with the chassis painting on my JK when purchased new,alot of the components were not even painted.Bought 1/2 dozen cans of semi-gloss chassis paint and try and touch up/repaint every time I am underneath adding mods.makes me feel better

 

That the truth alot of the sheet metal underneath mine was untouched but like you said easy fix.

 

what do you expect we live in a place where there is salt on the roads from dec to april

just keep spraying rust check on it or take it off and sand her down , prime it and use tremclad rust paint

 

whenever you have a jeep, doing touch ups to a lot of components, including steel bumpers, becomes a regular thing. so don't de dissapointed, also you pay more attention to the undercarriage of you jeep.