Polaris Ranger XP 800 ball joints fail at the snap ring, not the joint itself. That thin clip is the only thing holding a factory joint in the A-arm, and a work machine that tows, plows and carries a loaded bed finds it quickly. Keller ball joints remove it entirely — the two-piece housing threads into the arm like a nut and bolt. Hardened 4340 chromoly, greaseable, adjustable and rebuildable.
Todd Keller's original threaded design, covering the Ranger XP 800, the XP 800 Crew and the six-wheel Ranger 800 6x6. On these machines the same joint serves both positions, so you simply choose how many you need.
Key Features
- Two-piece threaded housing eliminates the OEM snap ring
- 4340 hardened chromoly steel housings and studs
- Adjustable and greaseable for correct stud articulation over years of service
- Rebuildable — a worn joint is serviced, not replaced
- One joint fits both upper and lower positions on this platform
- Covers the XP 800, XP 800 Crew and Ranger 800 6x6
- Limited lifetime warranty against manufacturing defects
- Made in USA
Built To Solve: Ranger XP 800 Ball Joint Pull-Out and Snap Ring Failure
- Snap ring shearing and letting the joint separate from the A-arm
- Clunking or knocking from the front end on rutted two-track and job sites
- Play in the wheel when rocked top-to-bottom on a jack
- Original joints that have simply reached the end of their life on a machine this age
- Torn boots admitting water, mud and grit so the joint wears from the inside
- Repeat failures on a Ranger that tows, plows or runs a loaded bed
Best For: Working Polaris Ranger XP 800 and 6x6 Machines
- Ranger XP 800 owners who tow, plow or haul rather than trail ride
- XP 800 Crew owners carrying passengers and more weight through the front end
- Ranger 800 6x6 owners working the machine in mud, snow and standing water
- Owners keeping a well-used machine in service rather than replacing it
- Anyone who wants a serviceable joint rather than another disposable one
Because these machines are long out of production, most buyers here are doing a front-end refresh rather than chasing a single failure.
Specifications
- Material: 4340 hardened chromoly steel, stud and housing
- Design: two-piece threaded housing, no snap ring
- Serviceability: adjustable, greaseable and rebuildable
- A-arm modification: not required
- Positions: one joint serves both upper and lower on this platform
- Warranty: limited lifetime against manufacturing defects, original purchaser
- Manufacturer Part Number: BJK-P-RG#AK (one joint), BJK-P-RG-K-2#AK (two joints)
Fitment
- Polaris Ranger XP 800: 2010-2014
- Polaris Ranger XP 800 Crew: 2010-2014
- Polaris Ranger 800 6x6: 2010-2016
The 6x6 runs two model years longer than the two other body styles, so check your own year against the list. Fitment is not guaranteed on applications not listed above.
FAQ
Why do Ranger XP 800 ball joints pull out of the A-arm?
The factory joint is retained by a snap ring seated in a groove. Towing, plowing and a loaded bed all push load through that clip, and once it deforms or shears the joint has nothing holding it. Keller joints thread into the A-arm instead, so there is no clip to fail.
Do these fit the Crew and the 6x6?
Yes. The XP 800 and XP 800 Crew are covered 2010-2014 and the Ranger 800 6x6 through 2016. The Crew and the 6x6 both carry more weight, which is usually why their joints wear first.
Do I need different joints for the upper and lower positions?
No. On the 800 Ranger the same Keller joint serves both positions, which is why this product is sold by quantity rather than by upper and lower.
Are these worth fitting to a machine this old?
That is the usual reason people buy them. A Keller joint is rebuildable, so on a working machine you intend to keep running it is the last set of joints you should need to buy.
Do Keller ball joints require A-arm modification?
Standard Keller joints do not — they thread into the factory arm as supplied. The Mega version uses an oversized housing and does require machined A-arms, which is the main reason to pick one over the other.
Can these be rebuilt instead of replaced?
Yes. They grease and adjust, and the Keller ball joint rebuild kit for Polaris services them with a new cup, boot and pin when the internals eventually wear.
Why Keller
Todd Keller designed the two-piece threaded ball joint to fix the one part of a stock front end that keeps failing, and SuperATV now builds and backs the line. The design has barely changed because it does not need to: thread the housing in like a nut and bolt, use a chromoly stud, and make the whole assembly serviceable so a worn joint gets rebuilt rather than binned.
Complete Your Ranger XP 800 Front End Rebuild
Before ordering, confirm which 800 body style you have and its model year, then decide whether you are replacing a single failure or doing all four corners. If the boots are torn but the joints are sound, the Keller boot replacement kit is the cheaper fix. If the joints are worn but the housings are good, the Keller rebuild kit for Polaris services them. On a working machine, tie rods and A-arm bushings are worth inspecting while everything is apart.
Installation Video
Official SuperATV installation walkthrough with Todd Keller: How To Install Keller Ball Joints
