Do you mean to fit the tranny on the chassis I will have to grind it out? If that's what you are talking about, I've already done that and fitted the tranny. Or do you mean to fit the sliders on, since the output shafts are close to the chassis? Oh, and do the Revo sliders fit on the E-Maxx output shafts? I'm probably just going to get dogbones made, since I'm going to have some big power in there soon.