This main shaft bearing fits Mack TRL-107 and TRL-1076/1078 5-speed transmissions, TRXL-107 and TRDXL-107 6-speeds, and TRDL/TRDLG-107/1070 units, keeping the shaft centered in the case so it can turn freely under gear load. It is a Mack-application replacement and is sold individually.Interchanges:581245R91Mack 67AX310Navistar 581189R91GBG-6640FeaturesMain shaft bearingFits Mack TRL-107 and TRL-1076/1078 5-speed transmissionsFits Mack TRXL-107 and TRDXL-107 6-speed transmissionsFits Mack TRDL/TRDLG-107,1070 10-7 speed transmissionsTech SpecsSell Pack: 1 EachAdditional InformationFits Mack TRL-107, TRL-1076/1078, TRXL-107, TRDXL-107, and TRDL/TRDLG-107,1070 transmissions.Used in these Mack modelsTRDL / TRDLG 107 / 1070 TransmissionTRDXL-107 TransmissionTRL-107 TransmissionTRL-1076 / TRL-1078 TransmissionTRTXL-107 / 1070 TransmissionTRXL-107 Transmission