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If I read correctly, both the Monroe Sensa-tracs and the Rancho 5000's are gas filled.

"Gas" shocks have oil too, but they also have a pressurized charge of nitrogen gas to help keep the oil from foaming. Foaming oil loses it's damping properties, so a gas shock is less likely to fade under heavy use.


Steve Carlson - 95 Trooper LS expo rig
Serenity now!