Repair ZIL-5301
When determining the condition of the rear axle by noise, you should make sure that the sound is coming from the axle

Adjusting the ZIL-5301 Parking Brake
The ZIL-5301 vehicles and AMO ZIL buses are equipped with a parking brake system driven by a spring energy accumulator (Fig. 1)

The cylinder head is a cast iron casting, in the internal cavities of which there are intake and exhaust channels closed by valves

Assembly and installation of the ZIL-5301 gearbox
Assembly and installation of the intermediate shaft
Install key 8 in the shaft grooves and sequentially press the second gear pinion (0.005-0.055 mm interference), reverse gear (fit from 0.04 mm interference to 0.01 mm clearance), third and fourth gear pinions (0.015-0.065 mm interference), pre-selected by journals, onto the shaft.