The Dana 300 is largely considered one of the best transfer cases offered by Jeep. It comes of no surprise that people will want to use it outside of its original application. #52-6309 is a 27 spline input shaft to replace the original 23 spline input shaft on the Jeep Dana 300. Customers who typically purchase this input shaft are planning on utilizing the Dana 300 up against one of the following transmissions: TH350, 700R4, 4l60E. Powerglide. It should be noted that this input shaft is normally sold in the following kits: PN50-6309, PN50-0432, PN50-9205. These kits include an adapter as is required for most applications. In the past, we received several requests for purchasing this input shaft separately.