The suspension must support the tub and control its movement. Before blaming shock absorbers or rods, rule out external support and load issues; then identify the exact system.
Which assembly the model uses
There may be springs and shock absorbers, rods in vertical designs, and counterweights with their own fasteners. Not all parts serve the same function or are replaced through the same access point.
The overall vibration and the dropped drum provide context. Manual pressure on the tub does not provide a valid bounce test for every design.
What the inspection should check
Assembly position, fasteners, spring and rod integrity, and signs of poorly controlled oscillation. A cracked counterweight or damaged mount requires evaluating the support, not just tightening it more.
The Electrolux spring procedure shows that positions and supports must be preserved. The spring energy and suspended weight make that intervention one that requires proper equipment and skill.
Selection and installation
The assembly must be compatible with the product. Replacing all units, replacing only one, or using a kit depends on the documentation; there is no universal rule.
Do not invent counterweight pairs or use lubricants to alter damping. After installation, position, freedom of movement, and response under the intended test conditions must be checked. The function of the suspension helps explain what is being validated.
If a fastener or the material supporting it is damaged, tightening alone will not restore the hold.