Due to the poor reliability of 5 bar drive wheels that reduce track lifetimes and lack of reason to have three incompatible gearboxes, use production gearboxes and 6-bar drive wheels.

Other changes to the armoured hull should correspond with the first variant (#4427).

In order to improve the robustness of the front plate, consider using the IS and T-44 type machinegun in the front, instead of a machinegun in a ball mount.

Considering the necessity of increasing the front armour of T-34-85 tanks, in order to supply the army with these tanks more quickly, approve the modernized tank with an increase of front armour from 45 mm to 75 mm immediately.

The side fuel tanks are protected by 45 mm armour at 0 degrees and skirts from sheet metal instead of 45 mm side armour at 45 degrees on the serial tanks. The lower rear plate is increased in height by 400 mm, and thickness reduced from 45 to 30 mm.

Due to the changes to fuel tank layout, the rear of the tank is altered.

The total size of the main fuel tanks remains at 540 L.

Aside from the aforementioned changes, instead of six fuel tanks placed in the fighting and engine compartments, two fuel tanks, 190 L each, are placed behind the gearbox.

Decreasing the thickness of the hull floor, roof, and over-track hull floor to 15 mm from 20 mm and the lower rear plate (connecting the floor and rear armour) from 45 mm to 15 mm.

Decreasing the drive wheel diameter to 530 mm with five bars instead of 634 mm with six bars.

Thickening the driver's hatch to 100 mm from 75 mm and the DT machinegun ball to 90 mm from 60 mm.

Change of the gear ratio of the conical pair to 1.562 from 1.857.

Increase of the upper front plate to 75 mm from 45 mm.

T34 vs tiger serial