'18-23 Jeep JL/JLU Rear Lift Coil Springs Suspension Synergy Manufacturing display

Synergy Manufacturing

'18-23 Jeep JL/JLU Rear Lift Coil Springs

Sale price$260.00
SKU: SYN-8864-10
4 Door or 2 Door Model:

4 Door or 2 Door Model

Lift Height (in.):

Lift Height (in.)

Quantity:

'18-23 Jeep JL/JLU Rear Lift Coil Springs

4-Door / 1"

MCQUEEN

190 South McQueen Road
Suite 109
Gilbert AZ 85233
United States

+14806332929
overview

Synergy MFG Jeep JL Multi-Rate Rear Lift Coil Springs. Synergy MFG has designed these springs from a clean sheet for the new Wrangler platform. All springs are multi-rate and have been designed to make a great platform even better. These springs are unique to the JL and not shared with the JK or other vehicles. Like OEM, our coil springs are unique lengths to account for load differences on each corner of the vehicle. There are right and left specific springs front and rear to guarantee the vehicle will sit level. Multi-rate design has a soft initial rate which prevents the spring from coming loose in the coil tower, even with long travel shocks. The ride rate is slightly stiffer than the OEM springs to account for additional weight from bumpers, winches, skid plates and gear. Springs are proudly manufactured in the United States of the highest quality steel. Springs are designed to be able to set solid (fully collapse) without overstressing the material and are pre-set from the factory meaning the springs will never sag or set.

Benefits:
  • Increased ride quality
  • Increased wheel travel/articulation/traction
  • No spring bowing
  • Lifetime warranty/guarantee against sagging and breakage
Features:
  • Multi-Rate coil springs allow for longer spring lengths and increased travel
  • Spring rates are only 5-10 percent stiffer than stock for superior ride quality
  • Coil spring block heights designed around common bump stop spacings to optimize wheel travel
  • Unique spring lengths for each corner of the vehicle so it will sit level side to side
  • Frequency balanced and tuned spring rates to maximize suspension performance on and off road
  • Abrasion-resistant black powder coat finish for maximum durability and corrosion resistance
  • Sold in pairs
Notes:
  • Coil springs require proper bump stop spacing with Synergy 8057-10 Bump Stop Spacers.
  • Lift heights are based off fully loaded Rubicon models. Other models will see more lift.
  • Coil Springs retain the stock rake of the vehicle.
  • Up to .75 inch of front coil spring spacer can be added to level the vehicle using 8017-075 front coil spring spacers.
  • Min bump stop spacing listed is the minimum amount of bump stop spacing required to prevent the springs from going into coil bind. Do not use less bump stop spacing.
Part # 4-Door Lift Height 2-Door Lift Height Spring Rate (Initial/Ride Rate) Collapsed Length Extended Length
8864-10 1” 2” 115/150 lb/in 5.6” 17.7-17.8”
8864-20 2” 3” 140/175 lb/in 6.0” 17-17.7”
8864-30 3” 4” 140/175 lb/in 6.0” 18-18.7”

 

Additional Information:

The Jeep JL platform required a new approach to coil springs. We could have re-used existing coil springs already in our portfolio, and they would be close, but close wasn't good enough. Instead, we designed our JL coil springs from the ground up, to account for all of the differences in this new platform. We have gone through many iterations of spring rates, lengths and designs. Each of these prototypes was tested on road and off, all the way from the Rubicon to Colorado. These springs were not considered done until we were confident we had a part that is measurably better than anything else on the market.

Like most other high-end long travel coil springs on the market, we take advantage of using multiple spring rates to increase the extended travel of the spring. Gone are the days where coil spring retainers are required to keep your springs from falling out on the trail. From our experience, there is a lot of misunderstanding on how multi-rate coil springs work, and why they would be preferred over linear-rate coil springs and vice-versa. In short, it depends on the application and what constraints we are working with. With the new JL platform we were able to design a dual-rate coil spring with a softer initial rate that is effectively collapsed at ride height. This softer initial rate adds to the effective overall length of the spring without adding more lift to the ride height of the Jeep. This allows us to keep a lower ride height and lots of down travel. At ride height the spring rate is effectively linear, which is desirable for tunability (shock valving), and predictability (driving feel). The springs are designed to maintain as much up travel as stock while adding to the available down travel, which increases traction, stability, and safety off road.

Our spring rates were kept just above stock Rubicon spring rates in order to maximize flex and traction off road. We did increase the spring rate slightly (less than 10%) in order to accommodate for the added weight of the typical accessories and armor (winches, bumpers, skid plates, gear, etc.).

Due to variances between Jeeps and how they are used, we designed these springs to match the stock rake of a fully loaded Rubicon. If you want the vehicle to sit level (without the stock rake) when unloaded, our front coil springs will accommodate up to a .75 inch front coil spacer without requiring additional bump stop spacing (8017-075). This means that the ride height and rake of the Jeep can be fine-tuned in order to get the perfect ride height without compromise.

Synergy MFG Jeep JL rear coil springs have very long free (extended) lengths. Due to this fact, we generally recommend that the end user make sure they are using the correct shocks in order to maximize available wheel travel. Our shortest springs will allow for around 12 inches of wheel travel front and rear. Taller springs will allow for more wheel travel. Generally, aftermarket shocks are spec’d short in order to prevent typical coil springs from falling out. We recommend at least one length longer shock for a given lift height (For example: use a 3.5-4 inch lift Fox shock with our 2 inch springs). Make sure the shock mounts and bump stops are setup to prevent the shock from bottoming out before the bump stops do.

 

Shipping & Returns

SHIPPING POLICY
There is a chance that your cart will display no shipping charges. Certain items populate a standard shipping rate, others are advertised as free shipping to the lower 48, and others (often multiple parts or larger orders) may not show a rate. There is nothing more to do on your end if it is free or flat-rate shipping.

If your order does require a shipping cost/option, our shipping department will determine the shipping charges, and we will email you the cost/options for your order to ship out. Once you receive that email, there will be a link to pay for the charges, or you can cancel the order and be fully refunded.

OFFERS OF FREE SHIPPING:
All free ground shipping offers only apply to shipping addresses in the continental United States. This notification will appear above the product information and on the cart page.

FLAT RATE GROUND SHIPPING:
Some products have a standard ground shipping policy if you require the product faster, please notify us in the notes section during checkout.

If you have special shipping requirements, please contact our sales department. Email us help@sdhqoffroad.com

PROCESSING YOUR ORDER:
If shipping costs need to be calculated/added, you will be emailed with an updated link to your order. Your updated order will include your order's shipping costs and be your original order with the letter "A" at the end. While checking for updates on your order, please add an "A" to the end of your order number, as your order number without the "A" will show canceled since it has been superseded.

FIBERGLASS SHIPPING POLICY:
Our shipping department takes the same time and effort in packaging your products as our engineers do in designing them. However, damage can still occur in shipping. Most of these damaged items can be easily repaired during install and or in paint prep. If this is not the case, the buyer must inspect the packaging and the products carefully upon receiving them, then accept the shipment and if need be, notate any damages and irregularities, such as crushed, torn, punctured, or broken parts on both the packaging and the product, on the freight bill or receipt at the driver’s presence. A signed receipt without any notation releases the carrier as well as SDHQ from any further damage claim. Discovery of damages after a clear delivery becomes the responsibility of the customer. The buyer must notify SDHQ of any damages within 24 hours. In cases of damage with proper notion on receipt, the carrier will determine whether to pay for the repair cost or replacement value of the damaged goods after damage inspection. Replacement value is the amount the buyer paid to SDHQ and is not negotiable. All disputes about the settlement amount shall be addressed with the carrier. SDHQ, under no circumstances, shall be liable for the damaged product or for subsequent settlement of the claim with the carrier.

POWDER COATED ROCK SLIDERS SHIPPING POLICY: While we pack with care, we advise against shipping powder-coated sliders due to the risk of scuffs/scratches during transit. Any shipping-related damage isn't covered by SDHQ.

GOOSE GEAR SHIPPING POLICY: All Goose Gear products are made-to-order. Once your order is placed, it cannot be cancelled or refunded. By checking this box, you acknowledge and agree to these terms. Thank you for understanding the unique nature of our custom manufacturing process.

RETURNS:
Some items may be eligible to be returned if returned as new within 30 days of shipping, with a 20% re-stocking fee. If eligible for return, the return amount will be for store credit. There are NO returns after 30 days from the date of receipt. Freight is nonrefundable. Refunds will be given on parts only and exclude labor or installation charges, shipping, or any other charges. All parts must be returned in the original package, cannot be damaged or installed, and must be in original condition.

For further info on our return policy, please visit the Online order returns page.

Shipping & Returns

SHIPPING POLICY
There is a chance that your cart will display no shipping charges. Certain items populate a standard shipping rate, others are advertised as free shipping to the lower 48, and others (often multiple parts or larger orders) may not show a rate. There is nothing more to do on your end if it is free or flat-rate shipping.

If your order does require a shipping cost/option, our shipping department will determine the shipping charges, and we will email you the cost/options for your order to ship out. Once you receive that email, there will be a link to pay for the charges, or you can cancel the order and be fully refunded.

OFFERS OF FREE SHIPPING:
All free ground shipping offers only apply to shipping addresses in the continental United States. This notification will appear above the product information and on the cart page.

FLAT RATE GROUND SHIPPING:
Some products have a standard ground shipping policy if you require the product faster, please notify us in the notes section during checkout.

If you have special shipping requirements, please contact our sales department. Email us help@sdhqoffroad.com

PROCESSING YOUR ORDER:
If shipping costs need to be calculated/added, you will be emailed with an updated link to your order. Your updated order will include your order's shipping costs and be your original order with the letter "A" at the end. While checking for updates on your order, please add an "A" to the end of your order number, as your order number without the "A" will show canceled since it has been superseded.

FIBERGLASS SHIPPING POLICY:
Our shipping department takes the same time and effort in packaging your products as our engineers do in designing them. However, damage can still occur in shipping. Most of these damaged items can be easily repaired during install and or in paint prep. If this is not the case, the buyer must inspect the packaging and the products carefully upon receiving them, then accept the shipment and if need be, notate any damages and irregularities, such as crushed, torn, punctured, or broken parts on both the packaging and the product, on the freight bill or receipt at the driver’s presence. A signed receipt without any notation releases the carrier as well as SDHQ from any further damage claim. Discovery of damages after a clear delivery becomes the responsibility of the customer. The buyer must notify SDHQ of any damages within 24 hours. In cases of damage with proper notion on receipt, the carrier will determine whether to pay for the repair cost or replacement value of the damaged goods after damage inspection. Replacement value is the amount the buyer paid to SDHQ and is not negotiable. All disputes about the settlement amount shall be addressed with the carrier. SDHQ, under no circumstances, shall be liable for the damaged product or for subsequent settlement of the claim with the carrier.

POWDER COATED ROCK SLIDERS SHIPPING POLICY: While we pack with care, we advise against shipping powder-coated sliders due to the risk of scuffs/scratches during transit. Any shipping-related damage isn't covered by SDHQ.

GOOSE GEAR SHIPPING POLICY: All Goose Gear products are made-to-order. Once your order is placed, it cannot be cancelled or refunded. By checking this box, you acknowledge and agree to these terms. Thank you for understanding the unique nature of our custom manufacturing process.

RETURNS:
Some items may be eligible to be returned if returned as new within 30 days of shipping, with a 20% re-stocking fee. If eligible for return, the return amount will be for store credit. There are NO returns after 30 days from the date of receipt. Freight is nonrefundable. Refunds will be given on parts only and exclude labor or installation charges, shipping, or any other charges. All parts must be returned in the original package, cannot be damaged or installed, and must be in original condition.

For further info on our return policy, please visit the Online order returns page.

Quality

We pride ourselves on offering only top-tier products, handpicked through strategic partnerships with the industry's elite.

When you choose us, you're investing in unparalleled quality and craftsmanship.

Learn more about what 'SDHQ Built' means to us here.

Quality

We pride ourselves on offering only top-tier products, handpicked through strategic partnerships with the industry's elite.

When you choose us, you're investing in unparalleled quality and craftsmanship.

Learn more about what 'SDHQ Built' means to us here.

Secure Payment

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

We accept payments with :
Visa, MasterCard, Shop Pay, PayPal, Apple Pay, Discover and more.

Secure Payment

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

We accept payments with :
Visa, MasterCard, Shop Pay, PayPal, Apple Pay, Discover and more.

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