When trying something new (such as putting Spidertrax axles under a new Jeep Wrangler) you may run into a few hiccups. We had to have custom speed sensor tone rings cut and mounted behind the brake rotor. This gave the Jeep a 52-tooth tone ring just like the factory tone ring but with a larger diameter. We had these made by Shamrock and then custom-mounted the speed sensors on the knuckles. It worked, but we still had some odd transmission shifting issues.