Helo all ! Looking @ purchasing a 16 - 17 Challenger RT Plus With the 8 speed xsmn Does anyone know what gear ratio the differential is with the RT Plus with the 8 speed Xsmn ? And is it available with anti spin / LSD ? I also wonder if there's an electronic posi locker available ( factory installed ) like the 2017 Ram 4x4 rear end ? Thanks for any response !