The aircraft's performance has been upgraded with the E-2B, and E-2C versions, where most of the changes were made to the radar and radio communications due to advances in electronic integrated circuits and other electronics.
E-2 bol doplnený variantmi E-2B a E-2C, ktorých zmeny predstavovali hlavne radarovú a rádiovú komunikáciu hlavne kvôli zlepšeniam v elektronikcých integrovaných obvodoch a v ostatnej eletronike.