Install notes and evidence

Synergy Manufacturing source wording says: Our Synergy Jeep TJ / LJ / ZJ / XJ / MJ / YJ Heavy Duty Ball Joint Kits replace your Jeep's factory ball joints with heavy duty ball joints.. Verify JK/JL/JT application, axle/trim, tie-rod or drag-link setup, stabilizer/mount path, alignment, and any required brackets before checkout.

Product-specific install PDFs or videos are not captured for this record yet. Treat this as a source gap before quote, checkout, or labor planning.

SteeringNeeds vehicle setup checkProduct image available

Synergy Manufacturing

Synergy Jeep TJ / LJ / ZJ / XJ / MJ / YJ Heavy Duty Ball Joint Kits

Vendor fitment: 1987-2017 JK Wrangler, LJ Wrangler Unlimited, MJ Comanche, TJ Wrangler. Steering fitment from the vendor source. Confirm final options and fitment on the vendor page before purchase.

Our Synergy Jeep TJ / LJ / ZJ / XJ / MJ / YJ Heavy Duty Ball Joint Kits replace your Jeep's factory ball joints with heavy duty ball joints. After over 5 years of development and over 500,000 test miles of research and development and serious abuse, these ball joints are the highest quality ball joints on the market. Our fully greaseable metal on metal design improves durability and performance. The extra large ball joint bearing surface eliminates the inner nylon liner, creating a longer lasting, more reliable joint. If you have a lifted jeep, then you need heavy duty ball joints to put up to the abuse of bigger tires and offroad riding. Fitment: Part # Description Fitment 4120-04 (1) Kn...

SKU

SYN-D3044BJ

Price

$150

Role

review candidate

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Fitment and build notes

Vendor catalog record promoted for browsing. Final fitment, install dependencies, and shopper selection still require review before checkout.

A source-backed fitment match is enough to shortlist the part. Before purchase, still confirm the exact vehicle setup, variant, install parts, and whether the customer is buying for DIY install or a shop quote.

Readiness

Fitment statusUseful for a shortlist, but exact vehicle setup, dependencies, or purchase path still need review.Needs vehicle setup check

Evidence levelNeeds source collection and claim-level review before it should be treated as recommendation-ready.Evidence review needed

Install docsNo product-specific install PDF, install support link, or official video is captured for this record yet.Source needed

Product imageProduct image available

Purchase pathUse for build planning or a shop quote

Visual prioritymedium

Source-backed facts

Fact summary

Models: JK Wrangler, LJ Wrangler Unlimited, MJ Comanche, TJ Wrangler, XJ Cherokee, YJ Wrangler, ZJ Grand Cherokee; Years: 1987-2017; Source: xcart_html; Captured: 2026-05-12