View 1 Photo View 0 Videos Allison AT540 Transmission for a 1979 Gm/Chev (Hd) TOPKICK Newly Listed Contact for price (Used) 1978 ALLISON (AT), TRANSMISSION ASSEMBLY- Model: AT540, Serial Number: 104644, Engine: GM/Chev 350 Gas, Reference images for condition For more information about this item, give us... ConditionUsedEngine Model350 GASFits To Make(s)GM/Chev (HD)Fits To Model(s)TOPKICKWill Fit Year(s)1979Stock NumberP-495072 MLS Number14107050CategoryTransmissions Last Updated1/23/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info