• In these systems, the front and the rear suspension units or else the units on the two sides of the automobile are connected together.
  • These are also called linked systems. 
  • The major advantage of such a system is that tendency of the vehicle to bounce, pitch or roll is reduced and a constant desirable attitude of the vehicle can be maintained. 
  • The simplest linked system is the air suspension. 
  • The other systems in current use are the Hydrolastic suspension, the Daimler-Benz vehicle suspension and the Hydragas suspension system.