Stewart and Stevenson.
Stewart and Stevenson Services Tactical Vehicle Systems Division is delivering 2.5-ton 4x4 and 5-ton 6x6 trucks from the Family of Medium Tactical Vehicles (FMTV) to the US army as of mid 1996.
Perry Engineering (Aus) with Stewart & Stevenson are bidding for the Australian Army's Project Bushranger Infantry Mobility Vehicle (IMV) with the Bushmaster 4x4.
Stewart and Stevenson also produce the SS300 high mobility 8x8 truck having a 2.5 ton payload.
From a company brochure:
The company was founded in 1902 by blacksmith
4WD Vehicles A-Z
4WD Toys & Models
History of 4WDs