Unleash the true potential of your Defender with an 8" GDP Portal Gear Lift. Designed to deliver unparalleled lift and enhanced torque, the GDP Portal Gear Lift transforms your vehicle into a ground-hugging beast. Choose from a 45% or 60% gear reduction for boosted torque, or go extreme with a 70% gear reduction coupled with dual idler gears. At the bounty hole, nothing can stand in the way of your Defender equipped with the largest portal lift and gear reduction. We, at GDP, are here to help you elevate your off-road experience. Get ready, because once you've installed our GDP Portal Gear Lift, your Defender won't just be a Defender—it will be YOUR Defender.
What is a Dual Idler®?
Discover the excellence of engineering with our unique Dual Idler Gear Portals. Perfected after years of meticulous research and development, these gear portals redefine strength and efficiency in torque transfer. The innovative design, featuring a second idler gear in the portal box, effectively doubles the surface area, delivering enhanced reliability and unmatched power.
But it's not just about quantity – we believe in perfect symbiosis. Achieved through precision CNC grinding, our two idler gears are mated flawlessly for optimal functionality. Crafted from the industry's toughest 9310 steel alloy, our gears stand unchallenged in their durability.
Thought dual idlers didn't matter? Experience the superior performance and resilience offered by GDP's Dual Idler Gear Portals, elevating industry standards, one gear at a time.
45%, 60%, and 70% Gear Reductions Destroy Mud
Unleash the beast within every Defender with our cutting-edge UTV mud system. Designed for the adventurous at heart, this system transforms your side-by-side into the ultimate mud challenger. With an impressive 8” portal box and options for 45%, 60%, or 70% gear reduction, conquer even the toughest terrains with unparalleled ease. Accommodate up to a 44” tire, harnessing the surplus torque to bulldoze through anything in your path—if the mud depth even dares to reach your skid plate. Witness more Defenders owning the mud, every time you embark on a journey, and be part of the phenomenon.
A Gear Reduction That Protects Your Drivetrain
Upgrade your vehicle with our premium Portals. These little wonders strategically place the gear reduction right in the hub - a design decision that enhances the lifespan of your drivetrain components. Plus, it's not just about durability. Our smart GDP technology drastically diminishes stress on your axles, differential, prop shaft, and transmission. Wondering about larger tires? Rest assured, even if you're rolling on the biggest tires out there, our Portals have you covered. Gain longevity in your vehicle's components and reduce undue wear and tear with our ground-breaking Portals.
Learn more about how tire size and gear reduction can unleash your machine’s potential.
Stronger Housings and Backing Plates
Discover the power of precision with our industry-leading portal boxes. Designed with meticulous detail and backed by hundreds of thousands of global ride hours, our portal boxes offer unrivalled strength and durability. Whether it's cast or USA-made billet aluminum for your housings, expect nothing but the highest quality, precision-engineered hardware when you choose us.
With additional support from 5/16” backing plates constructed from advanced steel alloy, our portal boxes promise longevity like no other brand. Experience the difference of elite craftsmanship with our portal boxes - built to outlast and outperform in all conditions.
- Our housings are reinforced for gear retention and optimized for oil flow
- Advanced steel alloy backing plates are stronger than chromoly
- Enhance with Portal Blood—gear oil formulated for GDP Portals
- There are no gimmicks and no vents because vents do more harm than good—we know because we tested them
Advanced Gaskets, Seals, and Bearings
Our portals use:
- Advanced gaskets and O-rings with excellent oil resistance and low deterioration rates
- A sealed input gear and double-lipped output seal
- 100% sealing coverage throughout so you can forget about oil leaks
- Double-angular contact output bearings to prevent premature wear
- Roller idler and drive bearings to maintain perfect gear meshing
Frame Stiffener Required
These Can-Am Defender 8” portals are big, beefy, and powerful. In fact, they give you such a big lift that your UTV needs a frame stiffener to keep from bending its chassis. We’ve put it through its paces and bent plenty of frames. Trust us and get a frame stiffener.
8” Portal Gear Lift Includes: | ||
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(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 | ||
Extended brake lines | ||
Steering stop kit (dual idler configuration only) | ||
All required hardware, including recessed castle nut socket | ||
Frame stiffener (must select at checkout) |
Can-Am Defender Portal Gear Suspension Recommendations | ||
---|---|---|
Max Tire Size | Required Suspension Setup with 8" Portals | |
40" | 2" Forward Offset A-Arms | |
44" | 6" Lift Kit | |
If you need help figuring out which gear reduction is right for you, check out our portal gear reduction calculator. | ||
Max tire sizes are measured at full compression and full turn. The given tires sizes are the largest we fit without rubbing. With minor trimming or a small amount of rub, larger tire sizes can be used. |
Patent # 11,299,042
Patent # 11,318,787
WARNING: This product can impact machine operation. Customer and/or user is responsible for ensuring that this product is compatible with their machine as currently configured, properly installed, and understands any impact this product has or might have on the machine's operation.
⚠ California Proposition 65 Warning ⚠
WARNING: This product may contain a chemical known to the State of California to cause cancer or birth defects or other reproductive harm.
- Can-Am Defender HD 5 : 2017-2021
- Can-Am Defender HD 5 DPS : 2017-2021
- Can-Am Defender HD 8 : 2016-2021
- Can-Am Defender HD 8 DPS : 2016-2021
- Can-Am Defender HD 8 XT : 2016-2021
- Can-Am Defender HD 8 XT Cab : 2016-2021
- Can-Am Defender HD 8 XTP : 2018-2021
- Can-Am Defender HD 9 : 2022+
- Can-Am Defender HD 9 DPS : 2022+
- Can-Am Defender HD 9 XT : 2022+
- Can-Am Defender HD 9 DPS CAB : 2022+
- Can-Am Defender HD 10 : 2016+
- Can-Am Defender HD 10 DPS : 2016+
- Can-Am Defender HD 10 XT : 2016+
- Can-Am Defender HD 10 XT Cab : 2016+
- Can-Am Defender HD 10 XTP : 2018+
- Can-Am Defender HD 10 Mossy Oak : 2018+
- Can-Am Defender HD 10 XMR : 2018+
- Can-Am Defender HD 10 Limited : 2020+
- Can-Am Defender HD 10 PRO : 2020+
- Can-Am Defender MAX HD 8 : 2017-2021
- Can-Am Defender MAX HD 8 DPS : 2017-2021
- Can-Am Defender MAX HD 8 XT : 2017-2021
- Can-Am Defender MAX HD 8 XT Cab : 2017-2021
- Can-Am Defender MAX HD 9 : 2022+
- Can-Am Defender MAX HD 9 DPS : 2022+
- Can-Am Defender MAX HD 9 XT : 2022+
- Can-Am Defender MAX HD 10 : 2017-2021
- Can-Am Defender MAX HD 10 DPS : 2017+
- Can-Am Defender MAX HD 10 XT : 2017+
- Can-Am Defender MAX HD 10 XT Cab : 2017+
- Can-Am Defender MAX HD 10 XMR : 2019+
- Can-Am Defender MAX HD 10 Lone Star Edition : 2018+
- Can-Am Defender MAX HD 10 Limited : 2020+
- Big Lift Kit or 2" Forward Offset A-Arms strongly recommended.
- Wheels need to have a center hole of at least 3.25" (82.55mm) or require a 1” wheel spacer.