Which neu

[Serum]

Here is what i did to my 14 cell 7XL powered maxx;

UE cvd's (rear only, kept the stockers in the front, and the rear ones are a spare for the front ones (hello, you still there?!)

got 7075 aluminum cups to beef up the diffs, and integy aluminum housings, using the RC-monster center shafts.

another must have upgrade is steel idlers; and modify the input shaft. the gears on the input shaft are held in place by weak pins.. replace them with a massive hardened pin (nail or such) and they hold up better.

Another option is to buy aluminum diffcups and use the new tmaxx3.3/e-maxx housings(don't know how old your maxx is, but the old housings used 2 screws, and the new ones use 4) these new housings along with aluminum cups make your drivetrain a lot stronger. Only problem is the stock tupperware®© drivetrain.. A better product of the tupperware®© drivetrain is found on the new t-maxx 3.3 (it uses the sliders of a revo, which are MUCH stronger..) you could try your luck on ebay and look for a set of those.. One thing.. They also need the new 3.3 arms/knuckles/turnbuckles.. (i had a complete set for about 45 bucks shipped..