Get a GDP Portal Gear Lift for the best power and performance on four wheels. With 4" GDP Portals, you can choose either a 15% or 30% gear reduction to get the right amount of torque for your tire size and how you ride. For riders who want extra strength, dual idlers are available for unmatched durability.
GDP Portal Gear Lifts are built for versatility, whether you ride wide open in the desert or crawl through mud. A 15% gear reduction gives you faster rides with plenty of torque, while a 30% gear reduction delivers the geared-down power needed for monster tires. Dual idlers add strength for riders who push their machines hard.
Portals place the gear reduction in the hub instead of the transmission, reducing stress on your axles, differential, prop shafts, and transmission while maintaining factory suspension geometry.
Built for strength
Available with billet or cast aluminum housing
Dual idler gear configuration maximizes strength
Cool, quiet, precision-ground gears made from 9310 alloy billet steel
1.5 in. diameter 4340 hardened steel drive shaft
Housings use advanced gaskets or O-rings
Universal hub fits all major bolt patterns
Lighter than the competition
Our cast and billet aluminum housings are reinforced for gear retention and optimized for oil flow. Advanced steel alloy backing plates add strength, and there are no vents because we found they do more harm than good.
Advanced seals and bearings
Advanced gaskets and O-rings with excellent oil resistance and low deterioration rates
Sealed input gear and double-lipped output seal
100% sealing coverage throughout
Double-angular contact output bearings to help prevent premature wear
Roller idler and drive bearings to maintain perfect gear meshing
Enhance your setup with Portal Blood, gear oil formulated for GDP Portals.
4" Portal Gear Lift includes:
(4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, gaskets, and thrust bearings
(4) Universal hubs and precision-ground stainless steel slotted rotors with lugs
(4) Specialized steel alloy backing plates
(4) Steel caliper mounting plates
(2) Steel steering arms
(2) Caliper adapter plates (specific models only)
Extended brake lines
All required hardware, including recessed castle nut socket
Frame stiffener (optional)
Max tire size recommendations for 4" Portal Gear Lift:
28.5" - Stock
29.5" - 3" lift kit
31" - 1.5" forward front A-arms
31" - 1.5" forward front A-arms and 3" lift kit
36" - 6" lift kit
Max tire sizes are measured at full compression and full turn. The sizes listed are the largest that fit without rubbing. With minor trimming or a small amount of rub, larger tire sizes may be used. If you need help choosing the right gear reduction, use the portal gear reduction calculator.
Fitment:
Polaris Ranger XP 1000 : 2017+
Polaris Ranger XP 1000 Crew : 2017+
Polaris Ranger XP 1000 Northstar Edition : 2017-2020
Polaris Ranger XP 1000 Northstar Edition Crew : 2017-2020
Polaris Ranger XP 1000 Northstar Premium: 2021+
Polaris Ranger XP 1000 Northstar Premium Crew: 2021+
Polaris Ranger XP 1000 NorthStar Ultimate : 2021+
Polaris Ranger XP 1000 NorthStar Ultimate Crew : 2021+
Polaris Ranger XP 1000 Back Country : 2019
Polaris Ranger XP 1000 Back Country Crew : 2019
Polaris Ranger XP 1000 Texas Edition : 2020+
Polaris Ranger XP 1000 Texas Edition Crew : 2020+
Polaris Ranger XP 1000 High Lifter : 2017+
Polaris Ranger XP 1000 High Lifter Crew : 2017+
Polaris Ranger XP 1000 Trail Boss : 2021+
Polaris Ranger XP 1000 Trail Boss Crew : 2021+
Polaris Ranger XP 1000 Waterfowl Edition : 2021+
Polaris Ranger XP 1000 Waterfowl Edition Crew : 2021+
Polaris Ranger XP 1000 Big Game Edition : 2021+
Polaris Ranger XP 1000 Big Game Edition Crew : 2021+
Notes:
Frame stiffener does NOT fit High Lifter Edition
Frame stiffener option includes front frame stiffener only
If you plan on installing this portal kit with a preexisting RIDE System Rear Steering Kit or plan on adding one in the future, call 855-743-3427 for compatible parts
14" or larger wheel required
Cannot exceed 5" backspacing
Not compatible with dual beadlock wheels
Wheels need a center hole of at least 3.25" (82.55mm) or require a 1" wheel spacer