3 options most likley
1. pinion seal (not hard but time consuming usualy have to reset the pinion preload)
2. cover gasket (very easy)
3. drain or fill plug leaking (very easy)
should just pick up a floor jack and jack stands. costco had these low profile ones with ruber pad for like $89 I used this on on my Z06 and now ZL1 just becasue of the ride height.
it is basically this jack at costco price.
http://www.northerntool.com/shop/too...5429_200345429