Sonnax has released its Smart-Tech big input shaft kit (part no. 22121B-08K), which the company says can prevent input shaft spline-twist and breakage in high-torque Chrysler 47RH, 47RE and 48RE diesel applications.
This kit fits listed converters fitted with a 35-spline turbine hub. The company says that compared to the best 300M 23-spline shafts, the Sonnax input shaft is 35% stronger at both the spline portion and the sealing ring/cross-hole area of the shaft.