i need a indestructable rear diff, please help

[blueb8llz]

so i just placed my order for a UE casing and FLM diff cup. ill report back once they arrive.
just to let you guys, for those interested in getting the FLM diff cup, there are two versions. one for the 3906 and the newer version for the 3905. the 3905 is supposely stronger because it allows you to fit the stock 3905 spiders and that CENTER SPIDER GEAR SUPPORT. im not even sure if the 3905 spiders will fit inside the original flm cup.
heres a link that shows both FLM diff cups:
http://www.addicted2rc.com/E-Maxx.html
i purchased mine from rcm though, just be sure to tell Mike which one you need. the one thats on his website is the original version. hopefully he has the 3905 version.

while i wait for my items, can anyone suggest me some good lubes, since i found out that the flm cup is not sealed. for reference, i have 85,000 wt oil in the front diffs. the only lube i got are super lube and gorilla snawt which i dont think is heavy/thick enough to be packing inside a diff cup.
thanks all