Abstract: An improved cab suspension member to replace an existing factory suspension providing a terminal tractor with an improved rear suspension to improve the ride and performance of a terminal tractor, the improved rear suspension installed after market or provided as an original factory installation, the improved rear suspension members applied under the rear cab portion of the terminal tractor, increasing the suspension support and also redistributing the load upon the terminal tractor cab.

Abstract: A modular suspension system for short distance repositioning tractors, often referenced as terminal tractors, isolating the shock and impact of a retractable fifth wheel and rear axle from the frame of the terminal tractor by the arrangement of a rear axle and fifth wheel boom having lift cylinders between them and joining the rear axle, a lift arm assembly and a trailing arm assembly as a singular modular unit, isolated from the frame of the terminal tractor by elastomeric bushings at a forward location and pivot point on the terminal tractor frame, with a secondary suspension located at the rear of the singular modular unit.

Abstract: The invention is a mechanical suspension system for cab-over tractors, specifically those used in terminal transport having two front cushion dual suspension components on the front pivot area of the cab to tractor frame connection and a single rear cushion dual suspension component on the rear of the tractor frame at the cab-over latch area, the three point dual suspension system providing a more stable suspension package than the four point and other single suspension systems.