During the final assembly of powertrain and chassis systems, grease guns pre-filled with molybdenum-disulphide grease are clipped directly onto the operator’s tool belt or suspended from overhead balancers. On the engine line, the gun is used to apply a precise bead of high-pressure grease to the splines of drive-shafts and CV joints before the boot is crimped; the molybdenum additive prevents fretting corrosion under oscillating loads and extends the joint’s service life beyond the vehicle’s warranty period. In the axle assembly area, the same gun lubricates king-pin bushings and ball-joints on front and rear suspension sub-frames, ensuring smooth articulation during wheel-endurance tests and quiet operation on the road. Operators work in timed stations, so the pre-filled cartridge eliminates downtime for refilling or mixing; a single trigger pull delivers the exact volume needed, reducing waste and keeping the line free of excess grease that could contaminate adjacent sensors or brake components. The gun’s compact size allows access to tight spaces beneath the vehicle, such as steering racks and differential mounts, where larger equipment cannot reach.