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What to look for when buying shocks

Discussion in 'Suspension' started by toyo freak, May 31, 2010.

  1. May 31, 2010 at 8:41 AM
    toyo freak

    toyo freak [OP] Another Toyota Enthusiast

    Mar 7, 2010
    First Name:
    Mobile, Alabama
    2010 V6 D-Cab 4x4
    5100s at 2.5, Wheeler 3 leaf progressive AAL, Weathertech liners, yellow wire mod, toyota OEM bed mat, cup holder mod, afe pro dry s air filter, UWS low pro toolbox, Escort radar detector
    So I found this in an old jeep catalog and thought I would share.
    Yes it is a long post
    Shock types explained: The two basic types of shock absorbers
    are gas charged and hydraulic. Both contain hydraulic oil but
    gas charged shocks are also filled with nitrogen that ranges
    from anywhere from 80-360 psi or more. Gas pressure is what
    keeps the shock oil from “foaming up” w/ bubbles. Nitrogen
    gas forces the oil molecules to stay together preventing
    foaming. “Shock fade” from foaming reduces performance.
    Gas shocks tend to be more responsive and better suited for
    High performance demands but cost more. Hydraulic shocks
    are very similar to gas charged units in construction but do
    not feature pressurized gas and are more economical. Hydraulics
    tend to be less prone to failure and are well suited for slow off-
    road use. Highway performance may lack in hydraulic shocks
    but they do handle ruts and pot holes better than some gas
    Piston Rod and Piston Diameter: The simple rule of thumb
    is that bigger is better. Big pistons have more shock
    dampening capabilities while larger diameter rods are
    simply stronger. Both features usually add cost to the
    shocks price.
    Shock body construction: Twin tube shocks feature the basic
    shock body design and are the most economical. Twin
    tube designs are commonly used for hydraulic, cellular and low
    pressure gas applications. Twin tube shocks can still function
    if the outer tube gets dented. Mono tube shocks use a thick
    single-wall shock tube to enclose the piston, oil and pressurized
    gas. Mono tube shocks can be more precise at dampening since
    they can be made to more precise specs and tend to be stronger
    than twin-tube shocks. Mono tubes are usually more resilient
    to shock fade and have better heat dissipation and typically use
    larger diameter pistons. Mono tubes tend to be more expensive
    than dual tube. Contrary to popular belief, external reservoir
    shocks do not have reservoirs to hold extra oil. The design
    actually allows extra air space during the compression
    cycle. Remote reservoir shocks tend to be the most expensive.

    Two most common shocks- OME and Bilstein 5100s
    OME -18mm piston rod diameter, 35mm piston diameter
    twin, tube gas charged
    5100s-, 14mm piston rod diameter, 46 mm piston diameter
    gas charged mono tube

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