RE: Help ID this tmaxx
gen 3.
original had a .15 narrow suspension small drive shafts
gen 2 had a 2.5, wider suspension stronger bulheads
gen 3 had 2.5r and 3.3, new optidrive transmission, updated driveshafts, different tires and shock towers.
gen 4 3.3 has reverse removed.
yours has upgraded driveshafts from what I can see.