Science and Education Publishing American Journal of Mechanical Engineering 2328-4110 3 6 2015 12 17 Modification of the Centre Differential Gearbox 240 243 EN Silvia Medvecká-Beňová Department of Construction, Automotive and Transport Engineering, Faculty of Mechanical Engineering, Technical University of Košice, Košice, Slovakia František Trebuňa Peter Frankovsky AJME20153617 10.12691/ajme-3-6-17 2015 7 4 2015 10 30 2015 12 15 The paper deals with the optimization of the centre differential heavy truck without a wheel reductions. Under optimization in this case means customizing cabinet differential type designed for easy gear to withstand a heavy load of new gear. Critical structural adjustment of high-voltage areas must be such as to reduce tensions. The basis for this optimization is the results of task solution by finite element method (FEM).