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.