Looking for the best Polaris ACE 900 gearcases? We’ve curated a list of top-quality seals, fluids, and kits to enhance your off-roading experience with tested and trusted parts for a smooth and reliable ride.
Polaris ACE 900 owners know the thrill of off-roading. To keep your ride smooth and reliable, the gearcase plays a key role. This guide highlights the best Polaris ACE 900 gearcases and parts.
We’ve picked top-quality seals, fluids, and kits to boost performance. Each product is tested and trusted for tough conditions. You’ll find easy upgrades to keep your ACE 900 running strong.
From leak-proof seals to durable bearings, we’ve got you covered. These parts ensure your ride stays safe and steady. Let’s dive in and find the perfect fit for your Polaris ACE 900.
List of Top 10 Polaris ACE 900 Gearcases
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REPLACEMENTKITS.COM Brand Gearcase Seal Fits Polaris RZR Sportsman Ace General 570 900 1000 Replaces 3235658 |
This product is perfect for Polaris RZR, Sportsman, Ace General 570/900/1000 owners needing a direct replacement for part 3235658. It offers American-made quality and a 100% satisfaction guarantee for reliable, hassle-free performance. |
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REPLACEMENTKITS.COM Brand Main Gearcase Transmission Triple Lip Oil Seal Fits Polaris ACE RZR 500 570 900 General Ranger RZR 1000 Replaces 3235495 |
This replacement kit is perfect for Polaris owners who need a reliable, high-quality seal. It’s easy to check if it fits your model and comes with a 100% satisfaction guarantee. |
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Polaris AGL Transmission Fluid and Gearcase Lubricant Full Synthetic for Off Road Vehicles with 4 Stroke Engine, Motor Oils for ATV UTV SxS Maintenance, 1 Quart, Qty 1-2878068 |
This product is perfect for ATV and UTV riders who need strong, reliable protection for their machines. It works best for those who drive in tough conditions and want to keep their vehicle’s transmission and gearcase running smoothly all year long. |
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Polaris AGL Full Synthetic Automatic Gearcase Lubricant and Transmission Fluid for Off Road Vehicles with 4 Stroke Engine, 1 Gallon, for ATV UTV SxS Maintenance – Part 2878069 |
This product is perfect for Polaris ATV, UTV, or SxS owners with 4-stroke engines who need reliable protection in extreme conditions. Its Full Synthetic Formula and Custom Additive System guard against wear, heat, and corrosion, ensuring smooth performance in severe temperatures and loads. |
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Front GearCase Differential Bearing Seal Kit for Polaris RZR 1000 900 800 570 Ranger 1000 900 570 500 Diesel ACE 900 570 500 325 Brutus, OEM# 3235174 3235171 3235484 1332842 |
This product is perfect for Polaris RZR, Ranger, ACE, Brutus, and other compatible off-road vehicle owners. It solves front wheel shaking, noise issues, and ensures stable, safe driving with durable steel bearings and rubber seals. |
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MISHON Full Service Engine Oil Change Kit for Polaris RZR 900 S 4 General 1000 |
This MISHON Full Service Engine Oil Change Kit is perfect for Polaris RZR 900 and General 1000 owners who want an easy, complete oil change. It is made for those who want to keep their ride running smooth and strong with the right fluids and filters. If you need a quick, simple kit that meets all warranty needs and fits many Polaris models, this is the one. |
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REPLACEMENTKITS.COM Brand Main Gearcase Transmission Triple Lip Oil Seal Fits Polaris Sportsman Scrambler 550 850 RZR RGR ACE General 570 900 1000 Replaces 3235052 |
This oil seal is perfect for Polaris owners needing a durable replacement for models like Sportsman, Scrambler, RZR, and ACE. It ensures strong performance with its Viton lip design and replaces 3235052. Backed by 100% Satisfaction Guaranteed, it’s ideal for riders who want reliable, American-made parts. |
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TUSK Storage Pack Black For POLARIS Sportsman ACE 900 2016 |
This product is perfect for ATV riders who need durable storage for their Polaris Sportsman ACE 900. It offers easy access, secure cargo space, and simple mounting for outdoor adventures. |
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Royal Sun Gearcase Seal Oil Seal Gasket Part Number# 3235658 Compatible with Polaris 2011-2019 RZR XP Sportsman 570 Ace General 900 1000 |
This oil seal gasket is perfect for Polaris owners with RZR XP, Sportsman 570, Ace 900, General 900/1000 models from 2011-2020. It offers a direct fit for Part #3235658, ensuring leak-proof performance and long-lasting durability in harsh conditions. |
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1332803 1332438 Front Differential Gear Case Assembly for Polaris RZR/RZR S 800 900｜RZR XP/XP4 900｜Ranger XP 570 900 1000｜Pro XD 2000D｜Brutus HD PTO etc. Replace 1332803 1332831 |
This product is perfect for Polaris RZR, Ranger, Pro XD, and Brutus HD PTO owners needing a durable front differential replacement. It fits many 2008–2021 models and uses high-grade materials for long-lasting performance in tough off-road conditions. |
Detailed Reviews
Finding the best Polaris ACE 900 gearcases means pairing expert analysis with real-world feedback. These top 10 picks deliver durable, high-performance upgrades for every ride. From leak-proof seals to smooth transmission function, trusted brands ensure your machine thrives in tough terrain. Explore our guide to pick the perfect fit for power and reliability.
1. REPLACEMENTKITS.COM Brand Gearcase Seal Fits Polaris RZR Sportsman Ace General 570 900 1000 Replaces 3235658
This gearcase seal from REPLACEMENTKITS.COM fits Polaris RZR, Sportsman, Ace, General 570, 900, and 1000 models. It replaces 3235658, offering a durable, direct-fit upgrade.
Crafted by an American-owned company, it guarantees high-quality construction and long-term reliability. The seal ensures proper function and leak-free performance. 100% satisfaction guaranteed with every purchase.
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Perfect For:
This product is perfect for Polaris RZR, Sportsman, Ace General 570/900/1000 owners needing a direct replacement for part 3235658. It offers American-made quality and a 100% satisfaction guarantee for reliable, hassle-free performance.
Ready to Purchase?
2. REPLACEMENTKITS.COM Brand Main Gearcase Transmission Triple Lip Oil Seal Fits Polaris ACE RZR 500 570 900 General Ranger RZR 1000 Replaces 3235495
This oil seal is made with a Durable DuPont Viton Lip. It fits Polaris models like ACE, RZR 500/570/900, General, Ranger, and RZR 1000.
American-owned company builds this seal with top aftermarket quality. The Durable DuPont Viton Lip resists leaks and wear. 100% Satisfaction Guaranteed ensures peace of mind.
It replaces 3235495 with a direct fit. Always Check your model and year for accuracy. This seal is a smart upgrade for long-term use.
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Perfect For:
This replacement kit is perfect for Polaris owners who need a reliable, high-quality seal. It’s easy to check if it fits your model and comes with a 100% satisfaction guarantee.
Ready to Purchase?
3. Polaris AGL Transmission Fluid and Gearcase Lubricant Full Synthetic for Off Road Vehicles with 4 Stroke Engine, Motor Oils for ATV UTV SxS Maintenance, 1 Quart, Qty 1-2878068
Polaris AGL Full Synthetic Transmission Fluid is made for tough off-road use in ATVs and UTVs like RANGER and RZR. It handles extreme heat and heavy loads to keep gearcases and transmissions running smooth.
Cold flow protection kicks in at low temps. High-heat shear resistance guards parts under stress. All-season performance keeps your ride reliable year-round.
The Custom Additive System fights chain wear, gear damage, and corrosion. This fluid is Polaris tested and approved for all Polaris 4-stroke off-road engines.
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Perfect For:
This product is perfect for ATV and UTV riders who need strong, reliable protection for their machines. It works best for those who drive in tough conditions and want to keep their vehicle’s transmission and gearcase running smoothly all year long.
Ready to Purchase?
4. Polaris AGL Full Synthetic Automatic Gearcase Lubricant and Transmission Fluid for Off Road Vehicles with 4 Stroke Engine, 1 Gallon, for ATV UTV SxS Maintenance – Part 2878069
The Polaris AGL Full Synthetic Automatic Gearcase Lubricant and Transmission Fluid is made to keep your off-road vehicles running strong. It works great with 4-stroke engines in ATVs, UTVs, and SxS machines. This 1-gallon fluid is built for tough conditions.
This fluid has a full synthetic formula that protects your vehicle in cold and hot weather. It stops wear and tear on gears and chains.
With its custom additive system, this fluid guards against rust, foam, and damage. It is tested and approved by Polaris for top performance. Keep your Polaris vehicle in peak shape with this trusted lubricant.
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Perfect For:
This product is perfect for Polaris ATV, UTV, or SxS owners with 4-stroke engines who need reliable protection in extreme conditions. Its Full Synthetic Formula and Custom Additive System guard against wear, heat, and corrosion, ensuring smooth performance in severe temperatures and loads.
Ready to Purchase?
5. Front GearCase Differential Bearing Seal Kit for Polaris RZR 1000 900 800 570 Ranger 1000 900 570 500 Diesel ACE 900 570 500 325 Brutus, OEM# 3235174 3235171 3235484 1332842
Keep your Polaris RZR or Ranger running smooth with this Front GearCase Differential Bearing Seal Kit. It fits many models and comes with all the parts you need for a perfect fix.
The bearings are made from strong steel. The seals use tough rubber. This kit stops shaking and noise fast. It makes your ride safer and steadier. Plus, you get 24/7 support and a 1-year warranty from JAVIK.
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Perfect For:
This product is perfect for Polaris RZR, Ranger, ACE, Brutus, and other compatible off-road vehicle owners. It solves front wheel shaking, noise issues, and ensures stable, safe driving with durable steel bearings and rubber seals.
Ready to Purchase?
6. MISHON Full Service Engine Oil Change Kit for Polaris RZR 900 S 4 General 1000
This MISHON kit is made for Polaris RZR 900 and General 1000 models. It meets warranty rules and fits many years and types.
Full-synthetic fluids give strong protection. Air Filter and Oil Filter keep your engine clean. Funnels make adding fluids quick and neat.
Flash Point shows high heat safety. Viscosity matches tough needs. Works in extreme temps from -40F to 100F.
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Perfect For:
This MISHON Full Service Engine Oil Change Kit is perfect for Polaris RZR 900 and General 1000 owners who want an easy, complete oil change. It is made for those who want to keep their ride running smooth and strong with the right fluids and filters. If you need a quick, simple kit that meets all warranty needs and fits many Polaris models, this is the one.
Ready to Purchase?
7. REPLACEMENTKITS.COM Brand Main Gearcase Transmission Triple Lip Oil Seal Fits Polaris Sportsman Scrambler 550 850 RZR RGR ACE General 570 900 1000 Replaces 3235052
This oil seal is built with a Durable DuPont Viton Lip for long-lasting use. Its 40 x 70 x 7 Triple Lip design ensures a tight, leak-proof fit. It replaces 3235052, making it easy to upgrade your Polaris gearcase.
The product fits Polaris Sportsman, Scrambler, RZR, and ACE models reliably. It’s made by an American-owned company known for high-quality aftermarket parts. Every order comes with a 100% Satisfaction Guaranteed promise.
Always check your model and year before buying. This seal offers a strong, precise fit for smooth transmission performance.
| Pros | Cons |
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Perfect For:
This oil seal is perfect for Polaris owners needing a durable replacement for models like Sportsman, Scrambler, RZR, and ACE. It ensures strong performance with its Viton lip design and replaces 3235052. Backed by 100% Satisfaction Guaranteed, it’s ideal for riders who want reliable, American-made parts.
Ready to Purchase?
8. TUSK Storage Pack Black For POLARIS Sportsman ACE 900 2016
The TUSK Storage Pack Black is built tough for your POLARIS Sportsman ACE 900 2016. It uses strong 600 denier polyester and has heavy-duty zippers. You get easy-to-handle nylon straps and handles.
Inside, the main compartment has semi-rigid walls and a soft felt liner. A removable divider lets you change the space for your gear.
This pack fits well with many machines—check the fitment guide. It offers a handy rear zippered pocket for extra storage. The size is 15 x 25 x 12 inches, and mounting hardware is included.
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Perfect For:
This product is perfect for ATV riders who need durable storage for their Polaris Sportsman ACE 900. It offers easy access, secure cargo space, and simple mounting for outdoor adventures.
Ready to Purchase?
9. Royal Sun Gearcase Seal Oil Seal Gasket Part Number# 3235658 Compatible with Polaris 2011-2019 RZR XP Sportsman 570 Ace General 900 1000
Part Number 3235658 is a gearcase seal oil seal gasket. It fits many Polaris models from 2011 to 2020. This seal helps keep oil inside the gearcase.
It works with Polaris RZR XP, Sportsman 570, General 900, and General 1000 models. Check your vehicle’s year and type before buying.
This durable replacement part stops leaks and protects your engine. It’s a direct fit for easy installation.
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Perfect For:
This oil seal gasket is perfect for Polaris owners with RZR XP, Sportsman 570, Ace 900, General 900/1000 models from 2011-2020. It offers a direct fit for Part #3235658, ensuring leak-proof performance and long-lasting durability in harsh conditions.
Ready to Purchase?
10. 1332803 1332438 Front Differential Gear Case Assembly for Polaris RZR/RZR S 800 900｜RZR XP/XP4 900｜Ranger XP 570 900 1000｜Pro XD 2000D｜Brutus HD PTO etc. Replace 1332803 1332831
This Front Differential Gear Case Assembly replaces OE numbers 1332803, 1332438, 1332831. It fits Polaris RZR 800, 900, Ranger XP, Pro XD 2000D, Brutus HD PTO, and more. Built with high-grade aluminum and steel for strong, lasting use.
Works with 2008–2021 Polaris models like RZR XP, Ranger Crew, and ACE Series. Durable design resists wear in tough off-road conditions. Each unit is tested before shipping to ensure quality.
Check your model matches the OEM for a perfect fit. Contact us if issues arise—we’re here to help.
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Perfect For:
This product is perfect for Polaris RZR, Ranger, Pro XD, and Brutus HD PTO owners needing a durable front differential replacement. It fits many 2008–2021 models and uses high-grade materials for long-lasting performance in tough off-road conditions.
Ready to Purchase?
Buying Guide
Smooth rides start with solid gearcases. The Polaris ACE 900 thrives on rugged trails, but a worn gearcase can slow you down. Upgrade with trusted parts to keep your adventure rolling.
- Compatibility: Match parts to your ACE 900’s model and year. Seals like the REPLACEMENTKITS.COM 3235658 fit multiple Polaris models, but double-check OE numbers to avoid mismatches.
- Material Quality: Durable materials like DuPont Viton lips or synthetic lubricants resist leaks and heat. Steel bearings and rubber seals in kits ensure long-term reliability.
- Performance Needs: Full synthetic fluids like Polaris AGL 2878068 handle extreme temps and heavy loads. Look for additives that fight wear, corrosion, and foam.
- Warranty & Support: Brands like JAVIK offer 1-year warranties and 24/7 help. REPLACEMENTKITS.COM and Royal Sun back their seals with satisfaction guarantees.
- Ease of Installation: Direct-fit parts like the 3235495 seal or MISHON oil kits simplify upgrades. Check if kits include all hardware for quick, hassle-free fixes.
- Brand Reputation: American-owned brands like REPLACEMENTKITS.COM and Polaris OEM parts are tested for tough trails. Avoid generic parts that might fail under stress.
Upgrade smart. Ride longer. Trust these factors to pick gearcases and parts that keep your ACE 900 trail-ready.