How to Adjust Rancho® RS9000®XL Shocks

How to Adjust Rancho® RS9000®XL Shocks

Nine Levels of Performance

Recognized as the first nine-position manually adjustable ride control series in the off-road market, Rancho® RS9000®XL shocks give you customized damping control and firmness for on-road and off-road flexibility.

Ideal for on- and off-road use, towing and more, the adjustable damping enhances ride characteristics by counteracting the additional unsprung mass inherent in larger tire and wheel combinations. Read on to learn how to set the shock to one of the nine available positions.

Adjusting the RS9000XL Shock

Adjusting the shock is as easy as turning the knob on the shock’s body just below the mount. Start by turning the knob counterclockwise to 1, and then start to fine-tune to achieve the ride you want.

To keep the knob in proper working order, follow these tips:

  • Rotate the knob at the base once a quarter or season to keep all parts moving.
  • Another option is to pack the knob with a silicone-based grease.
  • If you need to replace the knob, lightly tap your hex key socket (1/8") to make sure the hex key is set in the bolt. This makes removing the shock knob easier. NOTE – Take care when removing the knob; if there is internal damage or excessive corrosion, it could cause gas and pressurized oil to leak past the valve pin assembly.


Nine Levels of Adjustment

1-3 – Similar to OE ride

4-6 – Slightly firmer than OE ride; similar to Rancho RS5000®X ride

7-9 – Maximum control; great for towing and heavy loads


Finding your perfect setting depends on what you’re doing. If you’re towing something heavy, you’ll want to adjust up, while if you don’t have a load, turn it down. This flexibility is the big advantage of the RS9000XL shock – you can adjust the setting as often as you need to. Hauling a boat or trailer on the weekend? Adjust the shock between 7 and 9. Then when you get back home and are commuting back-and-forth to work, dial it down to between 1 and 3 for optimum performance.

RS9000XL Shock Features

  • Industry First -- Recognized as the first nine-position manually adjustable shock series in the off-road market
  • Designed For Hardworking Vehicles -- Ideal for stock or lifted trucks, SUVs and Jeeps that tow, haul, or go off-road
  • Reduces Fade -- Nitrogen gas pressurized to 120 PSI to minimize air-to-oil mixture and reduce damping performance fade and foaming
  • Strong And Durable -- Features an application-specific 18mm nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops at stress areas, and 1.25-in. sintered iron piston for enhanced structural integrity
  • Handles Extreme Temperature Changes -- Up to 2.75-in. tri-tube body (application-specific) filled with all-weather fluid allows for cooler operation, increased vehicle control, and ability to withstand internal temperatures of -40 to 248°

Rancho RS9000XL Shocks



Part Number - Location


Jeep Wrangler JL

RS999063 - Front

RS999064 - Rear


Jeep Gladiator JT

RS999063 - Front

RS999069 - Rear


Jeep Wrangler JK

RS999326 - Front

RS999328 - Rear


Chevrolet Silverado/GMC Sierra 1500

RS999830 - Front

RS999198 - Rear


Chevrolet Silverado/GMC Sierra 2500/3500

RS999377 - Front

RS999379 - Rear


RAM 2500/3500

RS999197 - Front

RS999044 - Rear


Ford F-150

RS999836 - Front

RS999316 - Rear


Ford F-250/F-350

RS999042 - Front

RS999047A - Rear

Learn more about performance shocks, find your performance suspension part, or find where to buy your shock or suspension part today.

The content in this article is for informational purposes only. You should consult with a certified technician or mechanic if you have questions relating to any of the topics covered herein. Tenneco will not be liable for any loss or damage caused by your reliance on any content.