Mack R series

Mack R Model
Overview
Manufacturer	Mack Trucks
Model years	1966-2005
Assembly	Allentown, Pennsylvania Hayward, California Iran, Tehran Saipa Diesel[1] (Was known as Iran Kaveh)
Body and chassis
Class	Class 8 truck
Body style	Truck (bonneted cab)
Layout	4x2, 4x4, 6x4, 6x6, 8x6
Related	Mack U Series Mack DM Series Mack Super-Liner
Powertrain
Engine	Turbocharged diesel 200–440 hp (150–330 kW)
Transmission	Mack / Fuller (manual) Allison (automatic)
Chronology
Predecessor	Mack B Model
Successor	Mack Granite

The Mack R series (also known as the Mack Model R) is a series of trucks that was manufactured by Mack Trucks from 1966 to 2005. The successor of the Mack B series,^[2] the R was a heavy-duty truck (Class 8) with a conventional (bonneted) cab configuration. With the exception of the Kenworth W900, the Mack R is the longest-produced commercial truck in history.

As with its predecessor, the R was offered in a wide variety of configurations for a comprehensive array of vocational and transportation applications. In addition, multiple Mack truck lines have shared components with the R, including the SuperLiner and CH/CL conventionals and the F, WR, and MH cabover trucks. Though not the first truck to adopt a forward-tilting hood, the Mack R introduced several innovations, including an air-ride cab, an integral engine compression brake, and a drivetrain that reduced the need for an auxiliary transmission.^[3]

The R was produced by Mack in Allentown, Pennsylvania (Lower Macungie Township, Pennsylvania after 1975); several versions (including the SuperLiner) were produced in Hayward, California until Mack closed its assembly facility there in 1980.^[4] The series was also produced locally by Mack Australia and in Iran (the latter, license-built, prior to 1979). During the 1990s, Mack began to phase out highway variants of the R in favor of the updated CH/CL, with severe-duty/construction variants lasting through 2005, with the Mack Granite series for those applications.