RTS Transmission Yoke Ford 31 Spline RTS offers superior transmission yokes in heavy-duty cast steel and 1350 Series chromoly to fit the most popular transmissions. Fully heat-treated to achieve optimal tensile strength, RTS chromoly transmission yokes are machined to ensure concentricity and balance for ideal driveshaft operation. Plus, they also offer specially heat-treated (case- hardened) yokes for your roller-bearing extension housings and chromoly Powerglide 2-piece cases that dramatically reduce transmission changes. Features * Forged 4340 Chrome. Moly * Maximum strength for extreme applications * Additional Strenht in critical areas * Black oxide finish for corrosion resistance * RTS Quality * 1350 series u-joint available in solid (non-crossdrilled) Applications C6 T45 T56 Magnum Top Loader FMX Tremec – Including TKX