I have a Slash 4x4 and i want a Stampede 4x4. So i bought a Pede 4x4 chasis, Middle drive shaft, And an 11T pinion gear. My slash 4x4 already has a 54T spur. But I just want to make sure before i install everything that the fron and rear of the truck is the same. I know the front and rear bolt on the same way, But are the Diff's and everything the same on both 4x4 trucks?