View 1 Photo View 0 Videos Mack T2180B Transmission for a 1999 Mack RD688S Contact for price MACK 2180B TRANSMISSION ASSY, WILL INSPECT AND DYNO TEST IN OUR GEAR SHOP., Serial#: NA, Engine Make: Mack, Engine Model: E7 ConditionUsedEngine ModelMack E7Fits To Make(s)MackFits To Model(s)RD688SWill Fit Year(s)1999Stock Number91526-6 MLS Number14641971CategoryTransmissions Last Updated10/3/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info