Together with three-wheeled agricultural trucks Terra-Gator 1603 / 1703 / 1803 / 1903 four-wheeled versions Terra-Gator 1604 / 1664 / 1804 / 1844 were produced. Terra-Gator 1604 was equipped with a Caterpillar 3208 engine and Terra-Gator 1664 with a Cummins VT555 engine and automatic transmission Allison. There was a turbocharged version Terra-Gator 1664T.
Terra-Gator 1804 was equipped with the Cummins 6CTA engine with an output of 275 hp and mechanical 18-speed or automatic transmission Allison. Later (in the mid-90s) Terra-Gator 1844 has been presented. It can be offered with Caterpillar 3208 (295 hp), Cummins 8.3L or John Deere 60 814 8.1L (325 hp) engine. In the early 2000s the trucks have been updated.
Ag-Chem Terra-Gator 1603 / 1703 / 1803 / 1903