1 0 Allison HT740DR Transmission for a 2000 Mack MR688S $750 USD CORE/ REVERSE VERY SLOW TO ENGAGE. ALL FORWARD GEARS OK, Serial#: GET, Engine Make: Mack, Engine Model: E7, Casting#: GET ConditionUsedEngine ModelMack E7Fits To Make(s)MackFits To Model(s)MR688SWill Fit Year(s)2000Stock Number32316-16 MLS Number9001907CategoryTransmissions Last Updated12/17/2023 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info