Unfortunately I think you will run into this issue redskull, as did I. The RRP gears seem like they are a must-have for this to be reliable. I don't think the t-maxx trannys can handle the instant torque of a brushless. I'd imagine the BL emaxx trans should hold up just fine, considering that is what it is made for. The issue there is that the 2 transmissions mount to the chassis differently.
There is hope though, I may be looking to sell my 3.3 trans with full RRP gears inside. I gotta see if I can make it work on an emaxx chassis first, if not you guys will be the first to know.
Progress update on my stuff. I now have a set of HCR towers and arms, a set of UE supermaxx wide maxx arms, a set of FLM towers and skids, and half of a Gorillamaxx G2 chassis. Going to be ordering an FLM chassis this week. And I am debating between FLM bulks or ACNCM bulks. Yeah the FLMs are nice and all name-brandy, but the ACNCM are much cheaper @ $40 for all 4 bulks, and they seem plenty strong.
In case you're curious