SPECIFICATIONS

Brand Name: M MATI

Origin: Mainland China

For ATV Brand/Model: Polaris

Special Features: Front Differential Rebuild Kit

MPN : 3235263 3234407 3235174 3235171 3234393 3235169

Placement on Vehicle : Front Differential

Warranty : 1 year

Package：

Front Differential Bearing & Seal Kit x1
Roll Cage Sprague & Clip set x1
Armature Plate x1
Output Hub Assembly x1

Fit for Polaris ATV/UTV  

Ranger 570 Crew Full-Size 2015
Ranger 570 Full-Size 2016
Ranger 900 XP 2013-2015
Ranger Diesel 900 2011-2014
Ranger Diesel 1000/Ranger Diesel Crew 1000 2015
Ranger Diesel HST 2014
Ranger Diesel HST 1000 2016-2017

RZR 570 2012-2014
RZR 800 2011-2014
RZR S 800 2011-2014
RZR 4 800 2011-2014

RZR XP 900 2011-2013
RZR XP 4 900 2012-2013
RZR 4 900 EPS 2014
RZR 900 S 2015-2016
RZR 900 S/RZR 900 S EPS 2017 (Only for if Built Before 8/29/16)
RZR 900/RZR 900 EPS Trail/RZR 900 XC 2015-2016
RZR 900 50/55 Inch 2017

ACE 325 2014-2015
Sportsman ACE 570 2015

Brutus HD HDPTO 2013-2014 2016-2018
Brutus HD HDPTO 2015（Only for Built 12/10/14 And After）

🛠️ Installation Tips

• Inspect the Ring Gear: Before reassembling, closely inspect the teeth on your ring gear and pinion. If there is pitting or chipped teeth, a rebuild kit will not fix the noise; the gear set would need replacement.

• Sprague Carrier Alignment: When installing the new Output Hub (Sprague), ensure the rollers and springs are seated correctly. A common mistake is "dropping" a roller during assembly, which will cause the differential to lock up or fail to engage AWD.

• Shim for Precision: Use the provided shims to ensure the correct "backlash" between the gears. If the fit is too tight, the diff will overheat; if it's too loose, you will hear a "whine" and eventually strip the gears.

• Clean the Magnet: The internal armature plate operates via a magnet. Thoroughly clean the magnetic surface of any metal "fuzz" or shavings. Even small particles can interfere with the magnetic pull required to engage the AWD.

• Fresh Demand Drive Fluid: After the rebuild, only use Polaris Demand Drive Fluid (or a high-quality equivalent specifically for Polaris front diffs). Standard gear oil is too thick and will prevent the Sprague rollers from engaging properly.

🔍 Troubleshooting Guide

Issue	Possible Cause	Solution
AWD Won't Engage	Cracked Output Hub or faulty armature plate.	Inspect the Sprague carrier (Output Hub) for cracks. If the hub is intact, check the electrical continuity of the internal magnetic coil.
AWD Won't Disengage	Warped armature plate or broken springs.	If the front wheels stay locked in 4WD even when the switch is OFF, the armature plate is likely bent or the Sprague springs are not pulling the rollers back.
Grinding/Clunking Noise	Worn bearings or chipped gear teeth.	Excess play in the output shafts usually points to failed bearings. If the noise happens only under load, inspect the pinion and ring gear.
Leaking Fluid at Axles	Failed output seals.	This kit includes new seals. Ensure the axle surfaces are polished and smooth; a grooved axle shaft will leak even with a brand-new seal.
Differential Overheating	Incorrect shim thickness or low fluid.	Verify the fluid level. If the diff is hot to the touch after a short ride, the gear backlash may be set too tight (needs thinner shims).