Polaris RZR PRO XP 4" Portal Gear Lift Gen 3 Portals Are Geared for All
Gen 3 portals for the Polaris RZR PRO XP are geared for all, and that means we’re not putting anyone in a box. Choose a 15% or a 30% gear reduction to match your ride style. Love going big and going deep? Get 30% gear reduction for maximum torque and bigger tires. Prefer trail riding? Get a 15% gear reduction. The choice is yours. Ride your way wherever you want. Let GDP take you where no one else can go. GDP—the Most Trusted Name in Portals
Whatever GDP Portal Gear Lift you choose, you can count on them being the best portals you can get. More riders roll on GDP portals than any other portal system. And with thousands of them out on the trail everyday amounting to hundreds of thousands of ride hours, you can bet they’re trail-proven. Perfect for Mud
The deeper you go, the more you’ll realize how much torque a portal gear reduction really gives you. Plus that extra ground clearance will keep you from getting swamped. Portals plus mud just makes sense.
Learn more about how tire size and gear reduction can unleash your machine’s potential. A Gear Reduction That Protects Your Drivetrain
Portals have their gear reduction right in the hub. That makes this gear reduction reduce the stress on your axles, differential, prop shaft, and transmission. You can ride harder than stock and cause less wear. It’s a win-win, and a recipe for fun. Unmatched Gear Material
We made our gears the most premium, top-of-the-line gears you can get. They’re made from precision ground 9310 alloy steel so they mate perfectly each and every time. That gives you super smooth, super quiet portals no matter how hard you ride. GDP gives you luxury and performance. Stronger Housings by Design
You think you can find better housings that GDP housings? Think again. Our housings are stronger by design. We know what makes a housing break and why. That’s why whether you choose a cast or a USA-made 6061 billet aluminum with a dead sexy CNC-machined finish, you’re getting a kick-ass housing with unmatched strength and reliability. We’ve got the experience and the riders on the trail to prove it.
The Strongest Portal Backing Plates You Can Get
- Our housings are reinforced in all the right places
- They’re built with better oil flow and gearing forces in mind
- There are no gimmicks and no vents because vents do more harm than good—we know because we tested them
We use an advanced steel alloy for our 5/16” thick backing plates. This isn’t your grandfather’s steel, it’s specialized for ultra-high force applications. It’s stronger than chromoly steel and, at that thickness, it’ll outlast your machine’s lifetime. We won’t settle for less on our backing plates, and neither should you. Advanced Gaskets and Seals
Whether you go with cast or billet, both housings use:
Bearings That Rock
- Advanced Thermo-Tork® gaskets with excellent oil resistance and a lower deterioration rate than Kevlar gaskets
- A sealed input gear and double-lipped output seal
- 100% sealing coverage throughout so you can forget about oil leaks
Bearings keep everything running smooth. A bad bearing means a busted box. We use roller bearings to hold our idler gear because we don’t compromise on strength. Our output bearing is a double angular contact bearing—that means it can handle huge loads in any direction without wearing prematurely. Our bearings are no joke. They’re built for battle and they’re another piece of the puzzle that makes GDP the best. Universal Hubs and Slotted Rotors
Our precision-ground, stainless steel slotted rotors stay cool to give you the braking power you need when you need it. And our universal hubs just make your life easier. They come with 4/156, 4/136, 4/115, and 4/110 bolt patterns and lugs—you can fit wheels built for just about any side-by-side in the world on these hubs. We invented the tapered output shaft that our hubs attach to. It provides a more secure lock that won’t wobble or wear over time. Top-Rated Customer Service
Still need a little help getting exactly what you need? We’ve got a dedicated team just for portal support. Give us a call so we can get the perfect set of portals in your hands today.
4" Portal Gear Lift Includes (4) Assembled portal hub boxes complete w/ 9310 gears, seals, output shaft, Thermo-Tork® gaskets, and thrust bearings (4) Universal hubs and precision-ground stainless steel slotted rotors w/ lugs (4) Specialized steel alloy backing plates (4) Steel caliper mounting plates (4) Caliper adapter plates (2) Steel steering arms (2) Aluminum hub adapters Extended brake lines Steering stop brackets All required hardware including recessed castle nut socket
Polaris RZR PRO XP Portal Gear Reduction Recommendations Max Tire Size Required Suspension Setup with 4” Portals Recommended 4” Portal Gear Reduction
Up to 34" Stock 15% Up to 34" 3" Lift Kit 15% 35"-36" 1.5" Forward Offset A-Arms 30% 35"-36" 1.5” Forward Offset A-Arms and 3” Lift Kit 30% Gear reductions listed are general guidelines to maintain factory top speed.
Installing a larger than recommened gear reduction will result in extra torque and lower top speed. Give us a call for more information.
Polaris RZR PRO XP 4" Portal Gear Lift