MOOSE OFFROAD 25-7103 Transmission Oil Seal Kit — Polaris Magnum 325 / 500 & Xplorer

MOOSE OFFROAD — Precision-Engineered Oil Seals, Leak Prevention, and Durable Transmission Protection for Classic Polaris ATVs

Stop power-robbing transmission leaks and protect your gearbox with the MOOSE OFFROAD 25-7103 Transmission Seal Kit. Designed specifically for the legendary lineup of Polaris workhorses, including the Magnum 325, Magnum 500, and Xplorer series, this kit is the professional solution for restoring a dry, sealed transmission. Whether your ATV is a 2x4 cruiser or a 6x6 Big Boss, keeping the oil inside the transmission is critical for gear longevity and smooth shifting.

This comprehensive kit contains all the necessary high-quality seals required to repair common transmission oil leaks. Each seal is manufactured to meet or exceed OEM specifications, utilizing premium materials that resist the degrading effects of gear oil, heat, and trail contaminants like mud and grit. By replacing hardened or cracked factory seals with the MOOSE OFFROAD 25-7103 kit, you prevent low-oil situations that can lead to catastrophic internal gear failure and expensive shop bills.

• Complete Repair Solution: Contains the essential seals needed to stop transmission oil leaks in one convenient package.
• OEM-Spec Performance: Engineered to provide an exact fit and reliable seal, mirroring the factory Polaris requirements.
• Premium Materials: Built with high-grade compounds designed to handle the high friction and thermal loads of an ATV gearbox.
• Comprehensive Fitment: Covers a wide range of vintage Polaris models, including Magnum, Xplorer, Xpress, and Big Boss series.
• Cost-Effective Maintenance: A smart alternative to expensive individual OEM part numbers without sacrificing sealing quality.
• Restores Reliability: Prevents oil contamination and ensures your transmission remains properly lubricated during heavy utility work.

Moto-House MX Pro Tip:

If you notice oil spots under your Polaris Magnum or Xplorer, don't wait for the gears to start whining. Transmission seals on these older machines often dry out from sitting or harden from years of heat cycles. The MOOSE OFFROAD 25-7103 kit is a "must-have" for any restoration or major service. When installing, always clean the shaft surfaces thoroughly and apply a light film of grease to the seal lip to prevent "dry start" damage during the first few rotations. For the best results, drain and replace your transmission fluid with a high-quality synthetic gear oil once the new seals are seated.

Model Series	Year Range	Fitment Notes
Polaris Magnum 325 / 500	1999-2002	Includes EBS and Freedom Models
Polaris Xplorer 300 / 400L	1995-1999	Fits Early and Late 4x4 Models
Polaris Big Boss / Xpress	1994-1999	6x6 and 2x4/4x4 Configurations

FAQ Questions

Q) Does this kit include every seal in the transmission?
A) This kit focuses on the primary output and input seals where leaks typically occur. It is designed for standard transmission repair/resealing without needing a full case split.

Q) Is this kit compatible with the Magnum 500 EBS?
A) Yes, the 25-7103 kit is designed to work with the Engine Braking System (EBS) models as well as the standard 4x4 and 2x4 versions.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. We are the best shop in Central Florida with lightning-fast shipping.