4 0 Allison HT740D Transmission for a 1976 Mack $1,200 USD VERIFICATION PENDING, Serial#: 6687, Engine Make: MACK, Part Make: ALLISON, Engine Model: 673 ConditionUsedEngine ModelMack 673Fits To Make(s)MACKWill Fit Year(s)1976Stock Number3A1E55937 MLS Number13350804CategoryTransmissions Last Updated11/11/2025 LocationSte-Julie, QC, Canada Sold ByCamions Lussier-Lussicam inc. (844) 503-___ SHOWNUMBERCall Seller Email Seller Save More Info