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CR BL Aluminum Front + Rear Differentials COMPLETE for Traxxas Slash Rustler 4×4
$149.50
Upgrade Your Traxxas 1/10 4×4 with the Cobra Racing Blue Traxxas Complete Differential Set
Take your Traxxas 1/10 4×4 to the next level with the Cobra Racing Blue Aluminum Differential Set. This complete set, featuring the Cobra Racing Helical Differentials and premium aluminum housings, is hand-assembled in the USA for smoother power delivery, enhanced handling, and unmatched durability — all while looking stunning on your RC vehicle.
Looking for a different color? These differentials also come in Red and Green to match your style.
Key Features of the Cobra Racing Blue (Complete) Differential Set
High-Grade 7075-T6 Aluminum Housing
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Crafted from premium 7075-T6 aluminum for maximum strength
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Durable enough for high-speed bashing and off-road abuse
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Lightweight yet robust, engineered to fit precisely in Traxxas 1/10 4×4 chassis
Cobra Racing Helical Differentials
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Pre-installed helical cut gears made of hardened steel
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Provides smoother operation and more efficient power transfer
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Reduces gear slippage and minimizes noise under high loads
Complete Front and Rear Set
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Upgrade both front and rear differentials at once
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Balanced handling and improved traction for every ride
Enhanced Compatibility
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Designed for a wide range of Traxxas 1/10 4×4 vehicles (see compatibility list below)
Performance and Longevity
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Combines aluminum housing with precision-engineered helical cut gears
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Reduces maintenance while ensuring long-term durability
Why Upgrade to the Cobra Racing Blue Complete Differential?
Durability
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Aluminum housing withstands intense RC driving, whether on-track or off-road
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Built to last for years of aggressive bashing
Performance
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Helical cut gears deliver smoother, quieter, and more efficient power
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Improves acceleration, cornering, and overall handling
Complete Upgrade
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Balanced front and rear set ensures optimal driving performance
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Pairs perfectly with the Cobra Racing Aluminum Shock Towers for a complete, eye-catching upgrade
Compatibility
The Cobra Racing Blue Traxxas Complete Differential Set is compatible with the following models:
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Traxxas Slash 4×4 / Slash 4×4 VXL / Ultimate / Platinum
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Traxxas Rustler 4×4 VXL
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Traxxas Stampede 4×4 / VXL
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Traxxas Hoss 4×4 / VXL
- Telluride 4×4
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Traxxas XO-1
- Rally 4×4
Also pairs seamlessly with the Cobra Racing Center Differential for full drivetrain upgrades.
What’s Included in the Package
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Front Differential Assembly with aluminum housing (fully assembled)
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Rear Differential Assembly with aluminum housing (fully assembled)
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Pre-installed Cobra Racing Helical Differentials
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High-quality screws for installation
⚠️ Important Notes
Grease / Maintenance
This differential set comes fully assembled, but the external grease is not pre-applied. Internal gears are pre-filled with grease, but for optimal performance:
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Open and top off or replace with your preferred differential oil
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Ensures smooth operation and long-term durability
Aluminum Housing Fit
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Manufactured to precise tolerances for a snug, exact fit
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When reassembling, press both halves firmly together until a distinct click confirms closure
Break-In Period (Highly Recommended)
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Run your vehicle at half power or on 2S batteries for 1–2 full cycles before stepping up to 3S
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Proper break-in ensures the internal components seat correctly and maximizes longevity
Shimming
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Proper shimming may be required for correct operation depending on your setup
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Incorrect shimming can cause excessive wear or output gear failure
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Always check fitment and adjust as needed before running
Guide to shimming your differential
| Weight | 9 oz |
|---|---|
| Dimensions | 9 × 1 × 7 in |
| Brand | Cobra Racing |
| Vehicle Brand | For Traxxas |
| Compatible Models | Fiesta Rally ST, Hoss, Rustler, Slash, Stampede, Telluride, XO-1 |
| Drivetrain | 4WD |
| Type | Differential Assembly |
| Compatible Fuel Type | Electric |
| Color | Blue |
| Compatible Scale | 1:10 |
| Condition | New |
3 reviews for CR BL Aluminum Front + Rear Differentials COMPLETE for Traxxas Slash Rustler 4×4
Only logged in customers who have purchased this product may leave a review.
Q & A
CR BL Aluminum Front + Rear Differentials COMPLETE for Traxxas Slash Rustler 4x4
Yes they will fit
cobraracingtech answered on July 16, 2024 store managerHello - yes will fit a raptor R. Differential gear itself is hard plastic but internal gears are hardened steel. Same gear ratio as stock.
cobraracingtech answered on July 1, 2024 store managerSorry, no questions were found

Verified owner michael b. (verified owner) –
Installed these in my Stampede 3s vxl. Fit and finish is top notch. It included new bearings and a new set of hardware. Makes a super cool sound at high speeds like zszsssssszzzszz
Verified owner Hershel Irwin (verified owner) –
Happy with the purchase
Verified owner mark clark (verified owner) –
I think the transmission is great