Mack R Model – specifications
Series: Other models
Build year not documented · Data origin: Reference work (Wikipedia/Wikibooks) · sources
Successor: Granite →
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The Mack R Model is a heavy Class 8 truck with a bonneted cab and one of the longest-lived American road and construction vehicles. The R series was built from 1966 to 2005. It replaced the Mack B Model, and its successor was the Mack Granite.
The R Model was assembled in Allentown, Pennsylvania, and in Hayward, California; Saipa Diesel in Iran built it as well. Diesel engines provided the drive, paired with automatic or manual transmissions. Among the series' innovations were an air-ride cab and an integral engine brake. Ownership changed during its production life: Mack belonged to The Signal Companies, Inc., later to Renault Véhicules Industriels and finally to AB Volvo.
The R Model stayed in service mainly on construction sites and in quarries, and it is still regarded as a symbol of the American vocational heavy truck.
Mack – further truck models: collective page for the US brand outside the named series, from the B and R models through CH and Granite to TerraPro, five- to eight-cylinder engines, gross weights up to 28.5 tonnes
This page gathers trucks from the US brand Mack that the register could not assign to a named series – from 1950s-to-1970s classics such as the B-61 and LTL, through the R and CH series, to newer models like Granite, Pinnacle and TerraPro. Mack was founded in 1900 in Brooklyn, later moved production to Allentown, Pennsylvania, and has belonged to the Volvo Group since AB Volvo's 2001 acquisition; the bulldog hood ornament has been the brand's mark since the 1930s. The model codes usually denote series and axle configuration, with R and CH covering long-haul tractor units and Granite and TerraPro covering construction and waste-collection vehicles.
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The register lists 81 versions here with five- to eight-cylinder engines, displacements up to 17.0 litres, kerb weights up to around 19.5 t at gross vehicle weights of 4,804 to 28,500 kg, lengths of 5,530 to 12,000 mm and widths of 2,240 to 2,900 mm.
Mack has been a fixture in North American long-haul transport, construction and waste management for over a century, competing there chiefly with Kenworth, Peterbilt, Freightliner and International; outside North America the brand is far less common, which affects parts sourcing and workshop availability.
On classic B, R and LTL models, check frame corrosion, the condition of leaf springs and drum brakes, and the originality of engine and gearbox; on the newer CH, Granite and TerraPro model years, check the turbocharger, exhaust after-treatment and wear on the automated manual gearboxes. Parts for current series run through the Mack dealer network, while historic models are sourced through specialist American classic-truck dealers.
Sources: SpecCodex register, model data: Mack (weitere Modelle), Mack Trucks (manufacturer)
Technical data
Engine
| Engine | diesel; petrolcorrect |
|---|
Drivetrain and chassis
| Gearbox | Mack / Fuller (manual gearbox); Allison (automatic gearbox)correct |
|---|
Origin and approval
| Assembly plants | Allentown, Pennsylvania; Hayward, Californiacorrect |
|---|---|
| Body | Truck (bonneted cab)correct |
| Vehicle class | Class 8 truckcorrect |
| Parent company | The Signal Companies, Inc.; Renault Véhicules Industriels; AB Volvocorrect |
Other data
| Predecessor | Mack B Modelcorrect |
|---|---|
| Successor | Mack Granitecorrect |
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 13 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: Tractor & Construction Plant Wiki (CC BY-SA 3.0) (retrieved August 2026) · Wikipedia (CC BY-SA 4.0) (retrieved October 2026) · Values adopted and presented in our own form; changes from the source are possible. · Data sources and cross-checks
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