Commonly referred to as "Bouncy seats," are front seats that travel vertically and are hydraulically dampened. Mine have a large circular adjustment for firm or soft, a latch to lock the seat down, and a small shock absorber. However, this appears to be quite different from what you describe, to what many refer to "Bouncy seats." Good luck.
-------------------- 92 Montero LS, Rancho Shocks, Hellas, AirLift bags,
99 Superduty 7.3, Rancho 9000s, Superchip, Banks Billet Torque Converter, AirRaid, BFG's, Pillar Guages, 4.5" Exhaust
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