First, stop posting the same question all over the place. Btw, this would be the correct section, the electric off-road section would not.

Second, just go to Traxxas.com and have a look at the pictures and specs of the different models of TMaxx. I can't tell you exactly what you have without pictures. These trucks have been updated over the years and parts can be mixed and matched, how b@st@rdized yours is can't be determined without pics. I can tell you no TMaxx ever came with a 3.3 and a black trans. You could have a Classic 2.5 with a 3.3 on it (most likely scenario), you could have an older 12in wheelbase 3.3 that someone put a black trans in. The difference between the two examples in the last sentence is the diffs, all the driveshafts, the color of some of the plastics and a few other things. Go to Traxxas.com, look at the pictures/exploded views and compare to your truck, specifically driveshafts, diff cases (2 screw outer case or 4 screw) that'll tell you what you need to know.