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Which way do rear shocks mount??

Discussion in 'Lifted & Offroad Suspension' started by jsbaker, Nov 15, 2007.

  1. jsbaker

    jsbaker New Member

    I recently purchased a 99 Suburban LT to replace our 99 Z71 that was having many issues even though it has only had 5000 miles put on it in the 10 months we've owned it.

    Suburban today and I am thinking the rear shocks are mounted upside down. The rear shocks are mounted with the moving shaft pointed down. So which way do they go?? All of the vehicles I have ever messed with rear shocks on they have been mounted with the shaft pointing up. If the shocks are mounted upside down would that make any kind of difference in ride quality?
  2. tbplus10

    tbplus10 Epic Member Staff Member 5+ Years 5000 Posts Platinum Contributor

    Doesnt matter the ride wont change. On Off-road trucks this is sometimes done to gain more clearance around the springs.
  3. Sooner

    Sooner Rockstar

    Provided the shock is not directional, I think you're better off. By mounting the shock with the body connected to the frame and the shaft connected to the axle, you reduce "unsprung weight" allowing the suspension to perform better. It makes a noticeable difference on sprint cars. But, we're talking about a 7,000 lb truck.
  4. collinsperformance

    collinsperformance Epic Member 5+ Years 500 Posts

    correct. you need to know the manufacture of the shock and see if they can be mounted upside down. some can some can not......mike
  5. GM_Guy

    GM_Guy Epic Member 5+ Years 500 Posts ROTM Winner

    the ones on my 89 suburban are with the moving shaft facing up
  6. jsbaker

    jsbaker New Member

    The shocks are bilstein's and I have no idea how old they are but we have determined they are definately bad.
  7. tbplus10

    tbplus10 Epic Member Staff Member 5+ Years 5000 Posts Platinum Contributor

    This is an answer I recieved after a similiar question I sent to Billstein a few months ago:


    Sir:

    Thank you for your inquiry on Bilstein shock placement and use.
    Almost all Bilstein shocks are designed to be universal and fit a variety of different applications. Bilstein uses high performance valving and seals in the manufacturing of every model shock we make to provide the best performance for any situations your vehicle may be used for. Unless specifically noted as "Directional" on the shock housing Bilstein shocks may be mounted with the shock body in the up or down position.
    Exceptions to this are Bilstein Liquid Filled shocks and Bilstein Resevoir shocks which are designed as specific vehicle fit shocks intended for High Performance use and should be mounted as specified.
    Hopefully this will answer any questions you have on mounting and use of your Bilstein shocks.

    James Aderson
    ThyssenKrupp Bilstein of America

    I recieved similar answers from Rough Country and Rancho.

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