All Balls 8 Ball Extreme Rear Axle AB8-PO-8-404 | Polaris RZR

All Balls 8 Ball Extreme Axle Rear | Part# 531-1590 | AB8-PO-8-404

The All Balls 8 Ball Extreme Duty Rear Axle AB8-PO-8-404 is a heavy-duty replacement axle for select Polaris RZR XP 1000, RZR XP 4 1000, RZR RS1, and RZR XP Turbo models. Built for riders who need more strength than a standard replacement axle, the 8 Ball design is made for demanding trail use, rough terrain, mud, rocks, and aggressive recreational riding.

A worn or damaged axle can cause clicking, vibration, binding, grease loss, torn boots, or drivetrain noise. Replacing it with an All Balls 8 Ball Extreme Duty axle helps restore smooth power transfer and dependable rear-end performance.

Key Features

• Extreme Duty 8 Ball axle design for select Polaris RZR models
• 8 precision ball bearings help provide smoother operation and increased joint strength
• Up to 35% larger cages and races for improved strength and durability
• Enlarged chromoly axle shaft for added strength
• Black oxide coating helps resist rust and corrosion
• Low-profile stainless steel clamps
• High-performance molybdenum grease helps reduce heat and friction
• Precision-machined for proper OEM-style fitment

Condensed Fitment Chart

Fitment Note: This is a simplified fitment chart based on the supplied application list. Fitment can vary by exact year, trim package, axle position, suspension setup, and production model. Always verify your exact year, make, model, submodel, and axle location before ordering.

Product Details

• Brand: All Balls Racing
• Part Number: 531-1590
• Manufacturer / Brand Number: AB8-PO-8-404
• Product Type: 8 Ball Extreme Duty CV Axle
• Position: Rear — verify exact side and fitment before ordering
• Vehicle Type: Polaris RZR UTV / Side-by-Side
• Application: Heavy-duty replacement axle assembly

Common Signs of a Bad CV Axle

• Clicking or popping from the rear axle area
• Vibration under acceleration
• Torn CV boot or grease leaking from the axle
• Binding, clunking, or rough drivetrain feel
• Visible axle shaft or CV joint damage
• Damage after hard trail use, mud riding, rocks, or impact

Important Use Note

This axle is designed as a heavy-duty replacement for compatible stock-style applications. Lift kits, long-travel suspension, oversized tires, extreme axle angles, or other drivetrain modifications may affect fitment, performance, and service life.

Why Choose an All Balls 8 Ball Extreme Duty Axle?

All Balls 8 Ball Extreme Duty axles are designed for riders who want added strength, smoother operation, and improved durability over a standard replacement axle. With larger internal components, chromoly construction, corrosion-resistant coating, and high-performance grease, this axle is built to handle tough Polaris RZR riding conditions.

FAQ

What does the All Balls AB8-PO-8-404 axle fit?

This axle fits select Polaris RZR XP 1000, RZR XP 4 1000, RZR 1000 RS1, RZR XP Turbo, High Lifter, and Trails & Rocks models from the supplied fitment list.

Is this a rear axle?

Yes. This product is supplied as an 8 Ball Extreme Duty rear axle. Always verify exact axle position and side before ordering, as fitment can vary by model and trim.

What is the difference between the 6 Ball and 8 Ball axle?

The 8 Ball axle uses eight precision ball bearings with larger cages and races for increased joint strength and smoother operation compared to a standard-style axle.

Will this fit modified RZR models?

This axle is designed for compatible stock-style applications. Lift kits, long-travel suspension, oversized tires, and other modifications may affect axle angle, fitment, and durability.

When should I replace my rear axle?

Replace the axle if you notice clicking, popping, vibration, torn boots, grease leakage, binding, or visible CV joint or shaft damage.

What is the manufacturer part number?

The manufacturer part number is AB8-PO-8-404.