Several types of variable wheelbase tractors are available in Uzbekistan. In this article, the mechanism for changing the wheelbase of a variable base tractor using a pendulum mechanism has been theoretically improved, and its stability and maneuverability have been enhanced. The structural strength of the modified tractor's wheelbase was tested. The magnitudes and directions of the loads occurring during soil cultivation were determined, and the impact of these loads on the structure of the variable wheelbase tractor was simulated using the Finite Element Method (FEM).