1973-1991 C20/C30 3 inch Front / 4 inch Rear Complete Lowering Kit (Shocks Included)

$1,140.62

Drop Front 3″ | Rear Lowered by 4″ | Includes Premium Shocks

This complete Chevy C20 and Chevy C30 lowering kit delivers both style and comfort with easy installation, premium components, and superior durability for a smooth ride and enhanced handling.

Transform your 1973-1991 C20/C30 into a sleek, lowered machine with this 3-inch front and 4-inch rear lowering kit. Complete with high-quality shocks, this kit provides superior handling and a smoother ride.

1973 – 1991 C20 / C30 Front 3″ lower control arms (8 lug trucks only)

$648.53

1973–1991 C20/C30 (8 LUG) 4 inch Rear Lowering Leaf Spring Hanger and Shackle Kit

$272.29

14.5″ Loop / Loop SuperShock (1409) × 2

$54.95 each

Available on backorder

18.5″ Loop / Loop SuperShock (1800) × 2

$54.95 each
SKU: DJM2655-3/4 Categories: , , ,

Description

Why Buy from DJM Suspension

High-Quality Components

Our lowering kits are crafted with precision and built to last, ensuring your vehicle gets the best performance with minimal maintenance.

Easy Installation

Designed for a hassle-free installation with included instructions, you can enjoy the improved ride and appearance without professional help.

Improved Ride Comfort

The included shocks improve handling, providing a smooth and controlled driving experience while maintaining the lowered look.

About DJM Suspension

DJM Suspension, a family-owned and operated American manufacturer, has been leading the lowering industry since the early 1970s. With a passion for aftermarket automotive products, including this 1985 C20 lowering kit, we provide top-tier performance and style for your vehicle.

Frequently Asked Questions

What vehicles are compatible with this kit?

Does this Chevy C20 and Chevy C30 lowering kit come with everything needed for installation?

Will this kit affect my truck's handling?

Can I install this kit myself?

Upgrade Your Truck’s Suspension

Get your truck the look and ride it deserves with DJM Suspension’s 1985 C20 lowering kit, which fits perfectly to any C20/C30 model between 1973 and 1991. You’ll enjoy a smooth ride, better handling, and a more aggressive stance. Shop now and take your ride to the next level!

Additional information

1973 – 1991 C20 / C30 Front 3″ lower control arms (8 lug trucks only)

Weight 50 lbs

1973–1991 C20/C30 (8 LUG) 4 inch Rear Lowering Leaf Spring Hanger and Shackle Kit

Weight 20 lbs

14.5″ Loop / Loop SuperShock (1409)

Weight 3 lbs

18.5″ Loop / Loop SuperShock (1800)

Weight 3 lbs

Download Lower Control Arms Instructions (PDF)

 

Part # CA2655L-3D & CA2655L-3P

1973–1991 Chevy C30 Pickup
Lower Control Arms

Installation Instructions
DJM Suspension www.DJMSuspension.com Tech Line: (310) 538-1583Rev. #07-02

Important — Read Before Installing

⚠️
Never work under a truck supported by a jack only. Use quality jack stands with a weight rating adequate for your truck.
🚫
Clearance check required: Installer must verify there are absolutely no clearance problems between the wheels, spindle, caliper, lower control arms, and any other component before driving the vehicle.
🔧
DJM parts should be installed by qualified mechanics. If you are not familiar with automotive repair, have the parts installed by someone with experience.
📋
Please read the warranty information (blue page enclosed). Complete your Product Warranty Card and mail it to DJM Suspension. Take accurate measurements before beginning installation and record them on the installation helper (back of warranty card).
⚙️
Factory coil springs only. This kit is designed to be used with the factory coil springs. Modifying for air bags will void DJM's warranty.
💡
New front shocks #TS1409 are recommended, but not required.

Hardware Parts List

CA2655L-3D — Left Arm
  • 1 Left Lower Control Arm
  • 4 Pivot Bushings (Installed)
  • 2 Sleeves (Installed)
  • 1 Ball Joint (Installed, #6129)
  • 1 DJM Cross Shaft (Installed)
  • 1 Tube Loctite
  • 2 Grease Fitting & Cotter Pin Bags
  • 4 Grease Fittings (pivot bushings)
CA2655L-3P — Right Arm
  • 1 Right Lower Control Arm
  • 4 Pivot Bushings (Installed)
  • 2 Sleeves (Installed)
  • 1 Ball Joint (Installed, #6129)
  • 1 DJM Cross Shaft (Installed)

Installation Procedure

 
Grease Fitting Prep

On the bottom of the pivot tubes are threaded holes for the grease fitting. Using a 1/8" drill bit, drill through the bushing and sleeve to create a path for grease. Remove any burrs on the inner sleeves, then carefully thread in the grease fitting.

 
Cross Shaft & Spring Installation

Line up the pins for the cross shaft and install using the factory u-bolts. Install with the factory coil spring only.

 
Sway Bar Bracket

Before installing the sway bar bracket to the control arm, loosen the bolts that hold the D-bushings to the frame under the bumper. Raise the lower control arm to ride height, install the sway bar brackets, then tighten.

 
Grease All Fittings

Apply grease to all grease fittings on both arms. Review all procedures and confirm that all parts are tight and correctly installed.

 
Wheels & Clearance Verification

Replace wheels and torque lug nuts. Verify the tires rotate in both directions without making contact with any component.

Critical: Installer must verify absolutely no clearance problems exist between the wheels and tires, the spindle, the caliper, the control arms, or any other component before driving the vehicle.
 
Toe Adjustment

Turn the steering wheel to center. By sighting down the tires and truck you can get the toe fairly close. Adjustment is made with the tie rod ends — loosen the nuts at the rack and turn the tie rod ends until the tires are in a straight line from front to rear. Your alignment shop will finalize this. Do not forget to tighten the nuts.

 
Measure & Record Ride Height

With the vehicle on the ground, measure the front ride height and record it on the installation helper. Your measurements should be approximately 3" less than the before-installation measurement.

After Test Drive

🏁
After test driving, inspect the installation and double-check that all hardware is tight.
📐
Take your truck to a qualified alignment shop for a professional alignment. Align to factory specifications.

Download Lower Control Arms Instructions (PDF)

 

Download Rear Hanger & Shackle Instructions (PDF)

 

Part # HS1119-4

1973–1991 Chevy C30
Rear Hangers & Shackles

Installation Instructions
DJM Suspension www.DJMSuspension.com Tech Line: (310) 538-1583Rev. #1-04

Important — Read Before Installing

⚠️
Never work under a truck supported by a jack only. Use quality jack stands with a weight rating adequate for your truck.
🌿
Leaf spring tension hazard. Leaf springs are under considerable tension. Use good judgment when removing shackle bolts. The rear spring may move and cause a pinch point between the spring and rear shackle.
⚙️
Overload spring removal required. This kit requires the removal of upper overload springs and striker pads, which may require additional load carrying devices to retain load capacity.
🔩
New rear shocks required. DJM Part #1800 rear shocks are required for this installation.
🔧
DJM parts should be installed by qualified mechanics. If you are not familiar with automotive repair, have the parts installed by someone with experience.
📋
Please read the warranty information (blue page enclosed). Complete your Product Warranty Card and mail it to DJM Suspension. Take accurate measurements before beginning installation and record them on the installation helper (back of warranty card).

Hardware Parts List

HS1119-4 — Included Hardware
  • 2 Spring Eye Hangers
  • 2 Shackles w/ Bushings (SH1012-2)
  • 8 7/16" x 14 Nylock Nuts
  • 8 7/16" x 14 x 1-1/4" Bolts
  • 16 7/16" Flat Washers

Installation Procedure

 
Remove U-Bolts & Overload Spring

Working one side at a time, remove the u-bolts holding the springs to the axle. To keep the spring pack together while removing the overload, use two large C-clamps placed close to the center bolt on the leaf spring and tighten. Remove the center bolt nut. Slowly loosen the C-clamps and remove the upper overload spring. Clamp springs back together, reinstall the center bolt and tighten. Remove C-clamps.

 
Reinstall U-Bolts

The spring center bolt must be seated in the hole on top of the axle — verify this before tightening u-bolts. When the center bolt is in place, install the u-bolts, bottom plate, and nuts. Tighten u-bolts.

 
Remove Striker Pad Brackets

Remove the two striker pad brackets attached to the frame.

 
Remove Stock Shackle

Loosen and remove the two shackle bolts and remove the stock shackle. Test fit the new shackle and check for interference on the bottom of the bed. On some trucks a square bed brace will be in the way of the shackle — cut a notch in the brace wide enough for the bolts.

 
Remove Front Spring Hanger

Remove the bolt holding the front of the leaf spring to the front spring hanger. Remove the rivets holding the spring hanger to the frame using an air chisel or by drilling out the rivets.

 
Mount New DJM Spring Hanger

Mount the new DJM spring hanger in the original holes on the frame using the hardware provided. The gas tank may need to be moved to gain access to bolts on the driver side. Raise the axle so the front of the springs can be located in the new hanger. With factory bolts, attach the spring to the hanger and install nuts — do not tighten yet. (Some may find it easier to attach the spring to the hanger before bolting the hanger to the frame.) See Fig. #1 for typical hanger installation.

 
Install New Shackle

Apply grease to the bushings and inside sleeves. Attach the new shackle on the frame mount and bolt in place with factory bolts (Fig. #2). Shackle installs with bushings down and open side forward. The hole farthest from the bushing will lower the truck more than the closer hole. Raise the rear axle high enough to align the spring eye and shackle. Insert the remaining bolt and install nuts.

 
Install Wheels & Check Height

Install rear wheels and torque lug nuts. Remove the jack stand and floor jack. Check the height of the rear — you can adjust the height by moving the spring to the other hole in the shackle. When satisfied with the height, install new shocks (DJM #1800) and tighten all bolts.

After Test Drive

🏁
Take the truck for a test drive. Double check all hardware is tight. Record the complete ride height on the installation helper.
📐
Take your truck to a qualified alignment shop for a professional alignment. Align to factory specifications.

Download Rear Hanger & Shackle Instructions (PDF)

 

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  • 14.5″ Loop / Loop SuperShock (1409)

    14.5″ Loop / Loop SuperShock (1409)

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