This mainshaft cup fits the Mack TRQ-7220 20-speed transmission and is sold individually. It forms the hardened race that supports the roller bearing on the mainshaft, letting the shaft turn smoothly under load. It is built as a replacement for the Mack transmission.Interchanges:Mack 64AX225GCU-6160FeaturesMainshaft cup for Mack TRQ-7220 20-speed transmissionSold pack: 1 eachTransmission partTech SpecsFitment: Mack TRQ-7220 Transmission, 20-SpeedSell Pack: 1 EachUsed in this Mack modelTRQ-7220 Transmission