Staff Answer
Nov 04, 2026 - 05:11 AM
Subject: Re: Diff309.01 for 2013 Polaris Scrambler XP 850 HO EPS
Hello,
Thank you for reaching out and for the detailed questions.
Compatibility
Yes, the Diff309.01 is a direct replacement for your original front differential, Polaris part number 1333053. It also replaces OEM #s 1333391, 1333569, 1333693, 1333920, 1334066, 1337106 and 1336982.
Bolt-on, axles and driveshaft
The Diff309.01 is a complete, brand-new assembly (new case and cover plate) built to the same mounting pattern, axle spline and input/driveshaft connection as the OEM unit it replaces. Your original front CV axles and prop shaft carry over with no modifications. You just need to add fluid at install.
Strength
The two most common failure points in this Polaris front drive are upgraded:
- Sprague cage: hardened aluminum, replacing the OEM plastic cage
- Pinion bearing: heavy-duty upgraded bearing
The ring and pinion gears are OE-spec.
AWD
It uses the same on-demand AWD design as the original, so it works with your factory Polaris AWD system and switch.
29–30" tires and aggressive riding
Many of our customers run this unit with larger tires and hard riding, and the upgraded sprague and pinion bearing address the parts that usually let go first. That said, 29–30" tires put noticeably more load on any front drive, OEM or aftermarket, so we can't promise it is unbreakable under that use. Keeping the fluid fresh and avoiding engaging AWD while the front wheels are spinning goes a long way.
Warranty
The Diff309.01 is covered by our 2-year no-fault warranty.
In regards to the 2013 not being listed on our fitment guide, please call or text your vin so we can verify the year. But it's irrelevant since you have the OEM # of your diff.
Please let us know if you have any other questions.You can reach us quicker at 813-814-2521
