Yeah and the 3.3 centershaft is a lil longer but you can cut the shaft shorter at the splines and splined case in the center so youll be ok...I have the 3.3 driveshafts , a-arms , knuckles , diffs and drive axles from the 4908 model in my classic maxx but I left the older black case transmission because I like the stall speed action the newer transmissions dont have and I also love the way it rolls freely both ways....You have more control of the truck with it too.It gives the 3.3 engine power a different -better attitude than my 4909 model T Maxx before I converted it to twin 3.3's...I thought mine was gonna wheelie and flip all over....well all it wants to do is rip the wheels,,,whether its dirt,gravel,grass or asphalt;- the little classic Maxx tires just dont have any traction from even a 3/4 throttle takeoff with this 3.3 engine and trans combined to its ultra lightness..Its real fun doing donuts because it does them so easily.....I'm gonna swap on the 4908 rims and tires on it later to see if theyll make the truck stick better...