We are using the OEM sensors, it's the tone ring that we can't effectively adapt to the 9", so we made our own, just smaller. It's what we've been doing for years on our Ram free spin kits etc. We looked at using the OEM tone ring, but it's too large in diameter to use anywhere I can think of. I'll get with Starr in a bit, Thanks AndyYou need to source some OEM sensors to make it work. You can contact Starr motors in virginia, they have done a straight axle swap also.