JY PERFORMANCE 5" Rear Axle Flip Kit for 1973–1987 Chevrolet/GMC Half-Ton — Bolt-On 5" Drop, Keeps Factory Leaf Springs

JY PERFORMANCE's 5" rear axle flip kit is a bolt-on solution that drops the rear of 1973–1987 Chevrolet and GMC half-ton trucks five inches using supplied mounting plates and hardware.

Upgrade your classic C10 or C15 stance without cutting the frame: this kit repositions the rear axle with an under-axle flip and includes axle locators, mounting plates, u-bolts, lock nuts, and washers to complete the change. Designed for bolt-on installation, it preserves factory suspension components while achieving a significant rear drop for a lowered, more aggressive look. The package is aimed at builders who want a straightforward mechanical modification to alter ride height and rear rake.

How does the kit lower my truck and what does "5 inches" mean in practice?

The axle flip relocates the axle tube above the leaf springs instead of below them, effectively lowering the rear ride height by approximately five inches. That measurement reflects the change in axle centerline relative to the springs and translates into a noticeable squat without altering spring packs or cutting the frame. Ride quality will depend on your springs, shocks, and load.

• Achieves roughly 5" rear drop by flipping axle position.
• Maintains original leaf springs—no spring modification required.
• Works with standard axle and wheel offsets for these model years.

What parts are included and will I need anything else?

The kit ships with the key mechanical pieces needed for the flip: axle locators, axle mounting plates, u-bolts, lock nuts, and washers. There are no printed instructions, so basic shop experience and standard tools are expected. Depending on your current setup you may want to reuse factory shocks or upgrade to shortened shocks to suit the new geometry.

• Included: axle locators, mounting plates, u-bolts, lock nuts, washers.
• No printed instructions — professional or experienced DIY recommended.
• Consider shorter shocks or adjustable shocks for optimal travel.

Will this fit my 1973–1987 Chevrolet/GMC half-ton pick-up?

This flip kit is engineered to fit 1973–1987 model-year Chevrolet and GMC half-ton trucks (C10, C15 and equivalent chassis). Confirm your axle type and wheel/tire clearance before purchase; some combinations of wide-offset wheels or oversized tires may require additional trimming or wheel choice adjustments. It’s built with OE-style mounting dimensions for these model years.

• Compatible with 1973–1987 Chevy and GMC 1/2-ton trucks (C10/C15).
• Check axle style and wheel/tire clearance before installation.
• Works with standard axle geometry for those years—verify as needed.

How complex is installation and how long does it take?

Installation is a straightforward mechanical job for a home mechanic or professional shop with jack stands and basic hand tools. Plan on several hours for disassembly, positioning the flip plates, and torquing hardware to spec; having a lift or floor jack makes the process safer and faster. Because instructions are not included, refer to experienced guides or a shop for torque values and alignment checks.

• Typical install time: a few hours for a competent DIY mechanic or less in a shop.
• Basic tools and safe lifting/staging equipment required.
• No included instructions—follow shop procedures or trusted guides.

Who this is for: The JY PERFORMANCE rear axle flip kit is intended for owners and builders of 1973–1987 Chevrolet and GMC half-ton trucks who want a clean, reversible way to lower the rear by approximately five inches. It's suited to experienced DIYers, custom restoration shops, and enthusiasts seeking a bolt-on approach to achieve classic lowered proportions without permanent frame cutting. If you prefer a simple mechanical change with supplied hardware and can handle or arrange professional installation, this kit delivers a dramatic visual drop while retaining serviceable suspension components.