In the year of 1952 we begun the building process of Dry Vans and cattle cages vans

In the year of 1955 we begun our design and built of the buses brand Sultana.

In the year of 1959 we begun building the first truck brand Ramírez the R-12 model, designed under the automotive norms of that time.

Later in 1960 and after the acceptance of R-12, it was bound to throw to the market other two similar models, R-15 and R-18 that were differing from the first one because its more powerfully engines for major capacities. 

It was in the year of 1963 when model's change was effected in its tractors, with a design in which from time behind, the engineering departments had come working, turning out to be the models R-18A and for the first time in our history a unit with two differential, R-18-2D.

In 1970 there was given to know the model R-22, of luxurious and wide cabin of aero dynamical lines, only in its type that provide the maximum comfort to the operator with reclinables and adjustable seats with pneumatic system and intermediate complement to form a bed, hood basculante that was offering free access to the engine and cooling system for a rapid maintenance, hydraulic direction and double power axle, Etc.  

For proper needs of the market it was necessary to develop another truck's model, this for more light loads named R-20.

Through the following years it is continued with the sale of this type of units, being in the year of 1981 when the company decides to incorporate the technology of the company The Budd Co., in the manufacturing process of Dry vans. 

The branch of products of were diversified from Dry vans to made Dumps, tanks, cattle cages, refrigerated Dry vans. 

In 1988 we begun to build Drop Deck chassis.

In 1992 begun association with Volvo Truck to manufacture Heavy trucks.

In 1995 It Initiates the exportation of Aluminum Dry Vans towards USA.

In 1996 association Initiates with Navistar International for the manufacture of medium trucks 4700, 4900 and 9200 class 8.