In the early 1960s, the 75-mm gun with a muzzle velocity of 1,000 m/s was deemed outdated. The vehicle received the new 90-mm F3 gun that used more powerful HEAT shells. This modernization did not require any significant changes to the turret or vehicle design. The first vehicles were manufactured in February, 1967. The existing vehicles underwent the gun modernization as well.
Commander
Radio Operator
Gunner
Loader
AMX 13 Type 2R
Detroit Diesel 6V53T
SCR 508
FL 10 Type D
75 mm CN 75-50
AMX 13 Type 2D
Detroit Diesel 6V53T-S
SCR 528F
90 mm F3M
Characteristics are specified for vehicles with crews trained to 100%.