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Thread: ATF: Bighorn - Suspension upgrade?

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    ATF: Bighorn - Suspension upgrade?

    I have a 2007 BH 3055RL and at that time they didn't have shocks. I have had a couple of spring failure incidents that have me thinking about a suspension upgrade to 7000 lb axles with shocks and the newer brakes. I would like to know if this is possible with the frame I have without having to be engineered. Thank you.
    Brad

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    Icantre Member
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    Re: ATF: Bighorn - Suspension upgrade?

    No engineering calculations required. Any competent service facility can do the job.
    Bob & Joyce Krull
    Forest Grove, OR
    2009 Bighorn 3385

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    karykatz
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    Re: ATF: Bighorn - Suspension upgrade?

    bradforx,

    All of this can be changed with some minor frame modifications. You will have to have the Shock mounts added and the spring spacing may need changed.

    I hope this helps.

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    Doug S
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    Re: ATF: Bighorn - Suspension upgrade?

    bradforx,
    I am by far not an expert on suspension, but while I was having axle work done at different locations, I was told the shocks really did not do much on an RV, especially at the angle they are on. I would do more research about shocks on RV's before I invested in them. With that said, my model has them on the unit.
    DougS

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    Re: ATF: Bighorn - Suspension upgrade?

    bradforx,

    We upgraded from Lippert 6K to Dexter 7K axles/brakes/springs, and upgraded to a beefier version of the EquaFlex Trail-air suspension. The repair shop did have some issues finding the correct axle dimensions, but overall we are very happy with the end result. We upgraded because our springs were flattening, one axle was possibly bent, and the suspension "was not quite right" in the words of the repair shop. We do not know for sure what caused all this (could be a number of reasons), but I consider our use of the trailer, "normal use". After the upgrade, the peace of mind is priceless!

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    Re: ATF: Bighorn - Suspension upgrade?

    There was a post earlier today wanting to sell 7K axles and large brakes. 2k-4k light weight springs such as on your coach are all 26 inches eye to eye so they are interchangable.
    2009 Augusta
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    Re: ATF: Bighorn - Suspension upgrade?

    HERE is a link to the axles and suspension that Lwmcguir is talking about.
    You may have to use some parts of your existing setup. The problem may come into play with the Equiflex from Lippert. I think your 07 has Dexter parts. A little measuring will tell.

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    Re: ATF: Bighorn - Suspension upgrade?

    You might be interested in these improved equalizers with about 4 inches of vertical travel. A lot less expensive than the MorRyde IS or Trailaire Centerpoint systems. Here is the link (watch the video) :
    http://www.morryde.com/aftermarket/s...system-38.html
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    Re: ATF: Bighorn - Suspension upgrade?

    Bradforx, are you trying to prevent spring failure in the future or dampen the jarring the trailer is taking traveling down the road? Shocks or dampers are designed to control the rate of travel of the springs; they are not designed as extra support for the springs. I would first investigate why the springs failed prior to installing shocks because if the springs are failing because of poor quality springs, mounts, design or overloading adding shocks will do nothing to resolve those possible problems.

    Think of it this way, I know you have seen an older car going down the road with one tire bouncing as the car drives down the road. That's what rubber tires do when they are suppended from the car on springs with bad/failed shocks. No dampening, just lots of boing. The car is still held above the road by the spring but as the tire hits cracks and bumps in the road it starts it bouncing which will not stop until the brakes are applied shifting weight to that tire (front). Because the tires are not being forced/dampened down against the road, grip/traction is lowered and stopping distances are increased without locking the brakes. Trailer shocks will mostly remove the bounce of the trailer and not the tires/axles.
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    Re: ATF: Bighorn - Suspension upgrade?

    My thought is that if the tires are bouncing that means the springs are getting quite a workout in addition to the tires.It seems shocks are designed to dampen the spring return so that should make it easier on everything. The last spring failure I had was due to twin potholes in Antigonish, Nova Scotia. It seems that the locals even had names for them. I don't know if fatigue had played a major part or not. I was thinking heavier springs would have helped since the trucks kept rolling through. Thanks for your reply. Brad
    Quote Originally Posted by Speedy View Post
    Bradforx, are you trying to prevent spring failure in the future or dampen the jarring the trailer is taking traveling down the road? Shocks or dampers are designed to control the rate of travel of the springs; they are not designed as extra support for the springs. I would first investigate why the springs failed prior to installing shocks because if the springs are failing because of poor quality springs, mounts, design or overloading adding shocks will do nothing to resolve those possible problems.

    Think of it this way, I know you have seen an older car going down the road with one tire bouncing as the car drives down the road. That's what rubber tires do when they are suppended from the car on springs with bad/failed shocks. No dampening, just lots of boing. The car is still held above the road by the spring but as the tire hits cracks and bumps in the road it starts it bouncing which will not stop until the brakes are applied shifting weight to that tire (front). Because the tires are not being forced/dampened down against the road, grip/traction is lowered and stopping distances are increased without locking the brakes. Trailer shocks will mostly remove the bounce of the trailer and not the tires/axles.
    Brad & Lisa, Pixie & Twinkle (the rest of the pack)
    Eugene, OR
    07 Bighorn 3055RL, Dexter AirFlex with disc brakes, Tri-Glide Pinbox,
    07 Chevy Silverado 2500HD Crew 4x4 D/A, Super Springs, Banks Brake, 30gal Transfer Flow aux fuel tank/toolbox, Tire Minder TPMS

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