Gear reduction providing increased torque and reduced drivetrain stress.
4 Gear Gen 2 NGA Portal Axle Kit Fits 2025+ Toyota 4Runner
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PERFORMANCE
Description
The Gen 2 Toyota NGA Portal allows you to build an extreme off road capable vehicle while still retaining the comfort and ride quality of the OEM suspension. Our 4 gear design provides a 22% reduction at the hub which allows you to run a bigger tire without the extra stress on drivetrain components. This means you run a 35-37” tire without having to regear axles, and without putting more stress on your factory front CV axles. The portal is your lift, the portal is your re-gear, and unlike conventional kits, it gives you ground clearance. A portal lift is widely recognized as the absolute best solution for an independent suspension system. It is why so many Ultra4 and Trophy Truck racers run our Race Portals. The portal allows you to keep your arms, steering, and CV’s flat at ride height yet still gain huge improvements in ground clearance. Stop lifting your suspension and start lifting your axles.
The Toyota portal brings our race-proven technology to the mass market. This 4 gear portal design borrows from our race-winning Ultra4 and Trophy Truck portals and scales things down to package perfectly on the 4Runner, Tundra, or Land Cruiser vehicle. With these portals you are able to re-gear, lift, improve ground clearance, and provide room for larger tires on your Toyota, all with a single product. This is a 100% bolt on product that is fully compatible with the factory ABS system.
Included:
✔ Billet Aluminum Portals Front and Rear
✔ Front and Rear Rotors
✔ 4340 Heat Treated Rear Full Float Axle Shafts
✔ All Necessary Hardware and Detailed Instructions
✔ Maxima Full Synthetic Oil
Fitment: 2025+ Toyota 4Runner
Please Note: In order to reserve a set, a 25% deposit is required.
Bolt-On Portal Revolution
Racing-validated technology that transforms trail-limited trucks into unstoppable trail dominators
Ground clearance gain - more than upgrading from 33" to 40" tires.
Maximum tire size on stock suspension - breakthrough capability.
Why Traditional Methods Fall Short
Limitations & Problems
The Traditional Approach Problems
- Suspension lifts: Compromise geometry, reduce travel, harsh ride quality
- Long travel kits: Heavy springs, mostly up-travel, expensive, complex
- Re-gearing: Expensive axle work, still limited by ground clearance
- Tire limitations: Stuck at 33-35" without major modifications
74Weld's Proposal
The Portal Solution
- Complete transformation: Lift + regear + brake upgrade + axle upgrade in one
- Maintain OEM comfort: No compromise on daily driving quality
- Proven capability: 39" tires on completely stock suspension
- Expert validation: "Making it look too easy" to experienced wheelers
Tire Capability Revolution
37" = The New 35"
Stock suspension + 37" tires: Minimal trimming, no firewall cutting
Zero other modifications: No cutting fender wells or major bodywork
Maintains factory drivetrain: 22% gear reduction compensates perfectly
39" Breakthrough Achievement
First Tacoma on 39s with stock suspension: "Nobody else is doing that"
Strategic trimming only: Some firewall work but totally achievable
Monster truck capability: Transformed appearance and performance
Perfect Gear Compensation
The Science: 22% larger tire + 22% gear reduction = factory performance maintained
Example: 3.91 gears × 1.22 = 4.77 effective final ratio
Drivetrain doesn't know: Transmission sees same load as smaller tires
Can still "bake them off": Full power delivery maintained
Portal Axles vs Traditional Suspension Lifts
Portal axles provide the lift, re-gear, and ground clearance of multiple upgrades in one bolt-on solution.
| Features |
74Weld Portal Axles
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Traditional Lift
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|---|---|---|
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Runs 39" tires on stock suspension
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Provides 3.9" actual ground clearance
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Maintains factory ride quality
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Reduces drivetrain stress by 22%
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Maintains all factory functions (ABS, parking brake)
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Complete bolt-on installation (no welding)
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Racing Heritage & Proven Performance
1
Professional Racing Validation
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Real-World Trail Domination
3
40,000+ Mile Daily Driver Testing
- Ultra4 and Trophy Truck teams rely on 74Weld portals
- 5+ years of desert racing in world's toughest conditions
- Baja to Johnson Valley: Proven in extreme competition
- Same gear set: Race-proven technology in your daily driver
Engineering Excellence Deep-Dive
1
Materials & Construction
2
Heat Management System
3
Reliability Features
- 7075-T351 aluminum: Stronger than most steels
- Straight-cut gears: Reduce heat generation vs. helical designs
- Four-gear design: Maintains rotation direction, doubles contact patch
- In-house machining: Precision manufacturing and quality control
Frequently Asked Questions
Find answers to common questions about 74Weld Portal Axles. Can't find what you're looking for? Contact our support team.
General Questions
Yes it is 100% bolt on.
4 portals, new larger 338mm front rotors, larger front calipers, 4340 heat treated full float shafts. We provide you with everything you need to bolt them on.
We offer a limited lifetime warranty on the knuckle and housing.
Yes, all factory ABS functionality is retained. You will not have a light on your dash.
Oil changes are recommended every 3,000 miles.
No. We upgrade you to 35 spline unit bearings.
Upgrading to rear disc brakes means you lose your factory drum parking brake. We do have a kit that is 100% bolt in and uses a high quality Wilwood mechanical calipers which bolt into your factory console so you can keep your parking brake.
Yes the portal adds 3.75” per side to the factory axle width
The portal is a 1.22:1 gear reduction.
No. These are designed to be able to spin faster than your Tacoma can ever go.
No, you can use any 6x5.5 wheel but we strongly recommend a 5.5”-6.5” offset wheel commonly made by Method, KMC, Raceline, Dirtylyfe, Vision, etc.
SUSPENSION & DRIVETRAIN
3.45”. This means your entire vehicle is lifted giving you unparalleled ground clearance.
The front axle shafts are retained and bolt in. We convert your rear semi float axle to a full float and provide you with 4340 axle shafts.
All final drive in our portals is 1.5” 35 spline. The rear upper gears are also 35 spline allowing you to run larger rear axle shafts. We do this so down the road if you want to upgrade your stock axle to a Dana 60 all you will need is new axle shafts to go full 35 spline.
Yes. On top of the reduced torque due to the gear reduction (22%) we upgrade your final drive to 1.5” 35 spline domestic 4340 heat treated axles.
Our portal reduces torque on the rest of your drivetrain. All of your axles, driveshafts, and drivetrain see 22% less torque making everything stronger!
74WELD PORTAL
- 40 INCH TIRE
- 6.00” BACKSPACE WHEEL
STOCK AXLE
- 40 INCH TIRE
- 4.50” BACKSPACE WHEEL
DURABILITY
As with any big tire application, upgraded ball joints are recommended for increased longevity.
As with any big tire application, the factory axle housing tubes are a weak point. An aftermarket housing or truss of the factory is recommended
There is a 10% difference in size between this gear set and our racing platform which is proven in 1000+ HP Trophy Trucks and Ultra4 vehicles
This is a USA made product.
INSTALLATION
If you are comfortable changing out a ball joint on your front end you can install our portals. You will be taking apart your front end as well as removing your rear axle shafts. If this is intimidating, we can point you in the direction of an approved installation shop.