The BA-64 consisted of the chassis of a GAZ-64 or GAZ-67 jeep modified to accept an armoured hull.[1] The jeep chassis required some alterations to accept the hull; for example, the cooling, fuel, and electrical systems had to be relocated while the rear suspension was braced to accommodate the additional weight.[2] Suspension consists of semi-elliptical springs front and rear, and steering is restricted to the front wheels.[3] A BA-64's gearbox initially had one reverse and three forward gears on a two-speed transfer case, although a few models appear to have one reverse and four forward gears and no transfer case.[3]