In 1951, a second modernization was made, designated T-54-3 (Ob'yekt 137Sh), which had a new turret without side undercuts, as well as the new TSh-2-22 telescopic gunner's sight instead of the TSh-20.
I 1951 blev der gennemført en anden modernisering, kaldet T-54-3 (Ob'yekt 137Sh), som indeholdt et nyt tårn uden underskæringer i siden og det TSh-2-22 teleskop sigte for kanonereren i stedet for TSh-20.