***Emaxx...newbie needs help with setup...just bought some stuff***

[Serum]

Yeah, it would be the best thing to do IMO, wait with replacement untill it needs to be replaced.

Sooner or later diffs will fail, and there are a lot of upgrade options available.

For a good and fast setup, for a relative low price, a mamba-maxx, Wanderer 8XL and 4S lipo's would be a nice combination. With that mamba controller you need an external receiver pack or a UBEC.

read the sticky in the brushless section about some BL basics, it would be good start.

the power comes from the batteries. if you have got 12-14 good cells you can get a fair speed/runtime. the price for a BL setup would be about 225dollars if you have got the batteries.

with Lipo's you need a special charger, and the price of lipo's is higher.