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7929 Lincoln Ave.  Riverside, CA 92504

Phone: 951.689.ICON    Fax: 951.689.1016

PART #

DESCRIPTION

37701P

99-UP FSD 4WD 3-6” REAR 2.5 VS PB PAIR

37701P INSTALLATION INSTRUCTIONS

WARNING!

** READ ALL INSTRUCTIONS THOROUGHLY FROM START TO FINISH 

BEFORE BEGINNING INSTALLATION! IF THESE INSTRUCTIONS ARE 

NOT PROPERLY FOLLOWED SEVERE FRAME, SUSPENSION AND TIRE 

DAMAGE MAY RESULT TO THE VEHICLE!

** ICON VEHICLE DYNAMICS RECOMMENDS THAT YOU EXERCISE 

EXTREME CAUTION WHEN WORKING UNDER A VEHICLE THAT IS 

SUPPORTED WITH JACK STANDS.

** ICON VEHICLE DYNAMICS RECOMMENDS ALL INSTALLTION TO 

BE PERFORMED BY A PROFESSIONAL SHOP/SERVICE TECHNICIAN. 

PRODUCT FAILURE CAUSED BY IMPROPER INSTALLATION WILL NOT BE 

COVERED UNDER ICON’S WARRANTY POLICY.

1.

 Using a properly rated jack, raise the rear of the vehicle and support the frame rails with jack stands. Ensure the jack stands are 

secure and set properly before lowering the jack. NEVER WORK UNDER AN UNSUPPORTED VEHICLE.

2

. Remove the factory shocks using 18mm and 21mm socket/wrench.

3

. Slide the wider spacer onto the stud on the upper shock mount. Slide the shock into the shock mount with the reservoir facing 

away from the axle. The driver side reservoir may need to be clocked (toward the spare tire) away from a wiring harness. Slide the 

narrow spacer onto the stud. [Torque to factory spec] [FIGURE 1 & 2]

COMPONENTS INCLUDED

(2) 134941PB 99-UP FSD 4WD 3-6” REAR 2.5 PB

HARDWARE INCLUDED

N/A

TOOLS REQUIRED

JACK

JACK STANDS

TORQUE WRENCH

18MM SOCKET / WRENCH

21MM SOCKET / WRENCH

TECH NOTES

1. YOUR ICON SHOCK ASSEMBLIES COME FACTORY CHARGED TO 250 PSI. RELEASING NITROGEN 

PRESSURE MAY LEAD TO SHOCK MALFUNCTION AND REDUCED RIDE QUALITY. FAILURE CAUSED BY 

LOW NITROGEN PRESSURE IS NOT COVERED UNDER ICON’S WARRANTY POLICY.

2. THE LOWER HEIM SPACERS FOR 99-16 AND 17-UP ARE INCLUDED. USE THE 14MM SPACERS FOR 

17-UP APPLICATIONS.

8-28-2017 REV.A

 INSTALLATION

FIG.2

FIG.1

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