6 Inch Rear Lowering Kit (For Trucks with OEM Two-Piece Driveshaft)

Take your lowered truck build to the next level with the 1999–2006 Chevy Silverado / GMC Sierra – 6 Inch Rear Lowering Kit for Trucks with OEM Two-Piece Driveshaft. Designed specifically for full-size GM trucks equipped with a factory two-piece driveshaft, this professional-grade rear axle flip kit delivers an aggressive six-inch drop while maintaining proper driveline geometry, suspension travel, and long-term ride quality.

Lowering the rear of a truck equipped with a two-piece driveshaft requires more than a standard flip kit. Improper driveline alignment can cause vibration, noise, premature bearing wear, and even driveline failure. That’s why this kit includes not only adjustable pinion angle flip brackets, but also an integrated carrier bearing adjustment system, allowing you to correctly realign both sections of the driveshaft for smooth, vibration-free operation after lowering.

Whether you’re building a slammed street truck, a clean daily driver, or a show-ready custom pickup, this kit provides everything you need to drop the rear of your Silverado or Sierra the right way — safely, correctly, and reliably.

Engineered Specifically for 1999–2006 Silverado & Sierra Trucks with Two-Piece Driveshafts

This rear lowering kit is precision-engineered for:

• 1999–2006 Chevy Silverado 1500

• 1999–2006 GMC Sierra 1500

• Trucks equipped with factory OEM two-piece driveshafts

• Compatible with both 2WD and 4WD configurations

If your truck uses a two-piece driveshaft with a center carrier bearing, this kit is the correct solution. Standard axle flip kits are designed for one-piece driveshafts and do not provide the necessary carrier bearing adjustment to maintain proper driveline alignment.

This system ensures:

• Correct driveshaft angles front and rear

• Proper carrier bearing positioning

• Reduced vibration and driveline noise

• Long-term reliability and smooth power delivery

Why a Specialized Kit Is Required for Two-Piece Driveshaft Applications

GM equipped many 1999–2006 Silverado and Sierra trucks with a two-piece driveshaft to accommodate wheelbase length and chassis design. This system uses:

• Front driveshaft section

• Rear driveshaft section

• Center carrier bearing mounted to the frame

When you lower the rear of the truck six inches, both the pinion angle and the carrier bearing position change dramatically. Without proper correction, this can result in:

• Severe driveline vibration

• Thumping or humming noises at highway speeds

• Premature carrier bearing failure

• U-joint wear and failure

• Transmission and differential stress

This kit solves those problems by combining:

• Fully adjustable pinion angle flip brackets

• Carrier bearing adjustment system

• Proper axle relocation hardware

This allows your drivetrain to remain properly aligned even after a significant suspension drop.

What Is an Axle Flip Kit and Why It’s the Best Way to Achieve a 6-Inch Drop

From the factory, the rear axle on your Silverado or Sierra sits below the leaf springs. A properly designed axle flip kit relocates the axle to sit on top of the leaf springs, instantly creating a drop of approximately six inches.

Compared to lowering shackles, hangers, or blocks, an axle flip provides:

• The largest drop possible with leaf springs

• Stronger axle control and stability

• Cleaner suspension geometry

• Improved traction under acceleration

• Reduced stress on suspension components

This kit delivers a true six-inch drop while preserving ride quality and driveline reliability.

Complete Kit Contents – Everything Required for a Proper Two-Piece Driveshaft Installation

This is a complete rear 6-inch axle flip lowering kit designed specifically for two-piece driveshaft applications.

Included components:

• Heavy-duty rear axle flip brackets with fully adjustable pinion angle

• Integrated carrier bearing adjustment brackets

• Precision-cut C-notch frame brackets

• New high-strength U-bolts

• Reinforced spring plates

• Rear bump stops

• Passenger-side shock extender

• Complete installation hardware kit (grade-8 bolts, washers, locking nuts)

Rear shocks are NOT included

Recommended DJM rear shocks:

• Driver Side Rear Shock: DJM 1800 (sold individually)

• Passenger Side Rear Shock: DJM 1900 (sold individually)

The included shock extender is designed for the passenger side only, due to the factory staggered rear shock mounting layout.

The included passenger-side shock extender ensures proper shock travel and prevents over-extension or premature shock failure.

Fully Adjustable Pinion Angle – Protect Your Drivetrain

Lowering your truck six inches significantly alters the relationship between the driveshaft and rear differential. Improper pinion angle is the number one cause of driveline vibration in lowered trucks.

This kit features fully adjustable pinion angle flip brackets, allowing precise adjustment during installation.

Benefits include:

• Smooth acceleration with no vibration

• Reduced wear on U-joints and carrier bearings

• Improved drivetrain longevity

• Quiet, comfortable highway cruising

When combined with the carrier bearing adjustment system, this kit delivers the most complete driveline correction available for lowered two-piece driveshaft trucks.

Carrier Bearing Adjustment – Essential for Two-Piece Driveshaft Trucks

Unlike one-piece driveshaft trucks, two-piece systems rely on a center carrier bearing to support the driveshaft. After lowering, the carrier bearing position must be repositioned to maintain proper alignment between both driveshaft sections.

This kit includes a carrier bearing adjustment bracket system that:

• Repositions the carrier bearing to the correct height

• Restores proper front and rear driveshaft angles

• Eliminates vibration and noise

• Prevents premature bearing and U-joint failure

This feature is critical and sets this kit apart from standard rear flip kits.

C-Notch Brackets – Restore Suspension Travel and Frame Clearance

A six-inch rear drop significantly reduces axle-to-frame clearance. Without proper frame modification, the axle will contact the frame during suspension compression, causing harsh bottoming and potential damage.

This kit includes heavy-duty C-notch brackets designed to:

• Provide safe axle clearance at full compression

• Prevent metal-to-metal contact

• Maintain usable suspension travel

• Improve ride comfort

• Reinforce the frame for long-term durability

The notch brackets are precision-cut to integrate cleanly into the factory frame rails for a professional-grade installation.

Built for Strength, Ride Quality, and Long-Term Reliability

Every component in this kit is manufactured from thick, laser-cut steel and engineered to withstand real-world driving conditions.

Construction highlights:

• Heavy-gauge steel flip brackets

• Reinforced pinion angle adjustment points

• Precision-cut notch plates

• Grade-8 mounting hardware

• Durable corrosion-resistant finish

This kit is built to handle daily driving, highway cruising, and spirited performance without compromising safety or comfort.

Ideal Applications

This rear lowering kit is perfect for:

• Lowered street trucks

• Custom show builds

• Sport truck projects

• Daily driven lowered pickups

• Performance suspension upgrades

Pair this rear kit with front drop spindles, lowering control arms, or coil-over systems to achieve a balanced, aggressive stance with proper handling.

Installation Overview – Professional Installation Strongly Recommended

Installation requires moderate to advanced mechanical skill and welding.

Typical steps include:

• Supporting and removing rear axle

• Installing flip brackets and relocating axle above leaf springs

• Installing new U-bolts and spring plates

• Cutting and welding C-notch brackets

• Installing carrier bearing adjustment brackets

• Setting pinion angle

• Installing proper rear shocks

Welding required
Final driveline angle adjustment required
Professional installation strongly recommended

Why Buy From Gauge Store

At Gauge Store, we specialize in premium suspension systems for lowered trucks and performance builds. Every kit we carry is selected for real-world performance, proper geometry, and proven fitment.

When you buy from us, you get:

• Authentic DJM Suspension components

• Correct fitment for two-piece driveshaft applications

• Expert suspension support

• Fast shipping and trusted aftermarket quality

Drop It Right. Align It Correctly. Drive It Smooth.

Lowering a truck with a two-piece driveshaft requires precision — and this 6 Inch Rear Lowering Axle Flip Kit with Carrier Bearing Adjustment delivers exactly that.

From adjustable pinion angle correction and carrier bearing repositioning to reinforced C-notch clearance and staggered shock geometry, this kit is engineered to provide the aggressive stance you want with the smooth drivability your truck deserves.

Upgrade your rear suspension today and build your Silverado or Sierra the right way.