[NiftySVX]

Usually, Higher strength manual transmissions are just simply bigger than the others. Synchronizers are bigger and there are more of them, etc. A major difference in a weak transmission and a stronger one is in how the gears are made and what the exact metallurgy of them is and how they are made. Most manual transmissions don't fail because the gears fail (Like the engine had so much power that it stripped the teeth off the gear) but because they can't handle the surges in the torque and because the shifting isn't smooth, because of driver error or because something is worn out of spec.