TH400, 4L80-E, Also fits BorgWarner T-10 & Muncie Sonnax performance forged slip yoke T3-3-2431CBHP for 1350 series u-joints is designed specifically for transmission output shafts which are threaded on the output end. The Sonnax yoke features a 1/2″ counter bore to convert these shafts from a bolt-on style to a slip-style yoke. It’s an ideal upgrade for superior strength and durability in high horsepower and high torque capacity applications, from street car, to street rod, drag strip, to dirt oval track. Talk with a transmission builder or driveline shop to verify your vehicle’s output shaft style. .