Mack R Model
2009-07-05 Deteriorating Mack truck
Manufacturer Mack Trucks
Parent company The Signal Companies, Inc.
Renault Véhicules Industriels
AB Volvo
Production Worldwide
Assembly Allentown, Pennsylvania
Hayward, California
Predecessor Mack B Model
Successor Mack Granite
Class Class 8 truck
Body style(s) Truck (bonneted cab)
Layout 4x2
Engine(s) Diesel
Transmission(s) Mack / Fuller (manual)
Allison (automatic)
Related Mack U Series
Mack Super-Liner

The Mack R Model was a Class 8 heavy-duty truck first introduced in 1966, by Mack Trucks, to replace the very successful Mack B Model.[1] Its production ran for 40 years until the RD model was discontinued in 2002 and the RB and DM models were discontinued in 2005. The first R models introduced were powered by Mack Thermodyne diesel and gasoline engines. In 1973 the R cab was given a makeover to include a deeper rear wall for more room and a new dashboard design.

Model numbers & lettersEdit

  • RB - Axle back (except in New Zealand - see NZ Mack RB)
  • RD - Heavy Duty R
  • RM - 4x4 Municipal/maintenance chassis
  • RMM - 6x6 Municipal/maintenance chassis
  • RS - Western R series, S stands for steel frame
  • RL - Western R series, L stands for Aluminum frame
  • RW - Western series, replaced by the Mack Super-Liner
  • Chassis numbers (GVW Rating):
    • 4xx -
    • 6xx -
    • 7xx -
    • 8xx -

Note: the xx is the place holder for the engine code.

  • Suffix letters:
    • T - Tractor
    • S - Six wheel chassis
    • L - Light weight components
    • X - Extreme duty

Engine codesEdit

95 - ENDT865 V8

See alsoEdit


  1. Corporate History: 1960-1969 - Mack

External linksEdit

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