Billet Aluminum Differential Cover For AAM 11.5"/12" 14 Bolts Rear Axle for 2020-2025 GM and 2019-2024 RAM | SPELAB
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- Ships from SPELAB
---tab Fitment---
✅ Compatible Axle Type
AAM 11.5" & AAM 12" 14-Bolt Rear Axle ONLY
Bolt Pattern: 14 Bolts
✅ Compatible Vehicles
GM Heavy Duty Trucks
2020–2025 Chevrolet Silverado 2500HD / 3500HD
2020–2025 GMC Sierra 2500HD / 3500HD
RAM Heavy Duty Trucks
2019–2024 RAM 2500 / 3500
⚠️ IMPORTANT FITMENT NOTE
Only fits vehicles equipped with AAM 11.5" or 12" 14-bolt rear axle
❌ NOT compatible with:
AAM 10.5"
Dana rear axles
Ford 10.25 / 10.5 / 8.8
GM 9.5" or 10-bolt axles
Please verify axle type before purchase (check axle tag, build sheet, or OEM differential cover bolt count)
Year
Make
Model
Engine
2019-2024
Ram
2500 Pickup
6.4L HEMI V8
2019-2024
Ram
2500 Pickup
6.7L Cummins Turbo Diesel
2019-2024
Ram
3500 Pickup
6.4L HEMI V8
2019-2024
Ram
3500 Pickup
6.7L Cummins Turbo Diesel
2020-2025
Chevrolet
Silverado 2500HD
6.6L Duramax Diesel
2020-2026
Chevrolet
Silverado 2500HD
6.6L V8 Gas
2020-2025
Chevrolet
Silverado 3500HD
6.6L Duramax Diesel
2020-2026
Chevrolet
Silverado 3500HD
6.6L V8 Gas
2020-2025
GMC
Sierra 2500HD
6.6L Duramax Diesel
2020-2025
GMC
Sierra 2500HD
6.6L V8 Gas
2020-2025
GMC
Sierra 3500HD
6.6L Duramax Diesel
2020-2025
GMC
Sierra 3500HD
6.6L V8 Gas
---tab Description---
Upgrade your rear differential protection with the SPELAB Heavy-Duty Differential Cover, engineered specifically for AAM 11.5"/12" 14-bolt rear axles found on GM and RAM heavy-duty trucks.
Designed for towing, hauling, off-road, and daily heavy use, this cover offers superior durability, improved heat dissipation, and easier maintenance compared to the factory stamped steel cover.
Key Features
Heavy-Duty Construction
Built from high-strength material to withstand impacts, debris, and harsh off-road conditions.
Improved Heat Dissipation
Reinforced design helps reduce differential oil temperature during towing and long-distance driving.
Direct Bolt-On Design
Precision-machined to match OEM 14-bolt pattern – no drilling or modification required.
Leak-Free Sealing
Machined sealing surface ensures a proper gasket fit and long-term oil retention.
Innovative points:
1. The external heat sink design increases the contact area between the differential cover and the surrounding air, enhancing heat dissipation performance.
2. The internal diversion groove design aligns with the direction of liquid flow in the differential gear's rotation, ensuring maximum flow rate for better lubrication.
3. The use of aluminum alloy material significantly improves cooling performance compared to the commonly used iron material. When comparing billet to cast products, billet items are often considered more durable and built for long-lasting performance.
4. An external observation mirror with a floating ball is used to monitor the oil level. Traditional observation mirrors in the market may darken over time, reducing visibility. Therefore, the floating ball allows us to monitor the oil level even if the mirror darkens.
---tab Blog & Video---
Video
First Purchase: 6.0L Power Stroke with SPELAB Differential Cover: 800+ HP Performance Upgrade, Full-System Modification Tested!
Performance Upgrade Installation Guide
RAM Series SPELAB Differential Cover Installation Overview｜Installation Process + Real-World Feedback
Failure Prevention Installation Guide
SPELAB Differential Cover 6.0 POWERSTROKE Installation Process + Real-World Feedback
Failure Prevention Installation Guide
The Differential Cover Upgrade Every Truck Owner Needs
Comparison Video Repair Guide
SPELAB Differential Cover User Experience: High Strength + Easy Maintenance
Comparison Video Repair Guide
Dodge / RAM SPELAB Differential Cover—truck build just got a serious boost
Comparison Video Repair Guide
×
---tab Shipping---
• Fast Shipping Policy:
The order will be dispatched within 1-2 business day, and the package will arrive within your order's estimated date. Please click Shipping Policy for more details.
• Easy Return Policy:
Every order comes with a 14-day free return which means you don't have to pay for a return slip. Please click Return Policy for more details.
---tab Fitment---
✅ Compatible Axle Type
AAM 11.5" & AAM 12" 14-Bolt Rear Axle ONLY
Bolt Pattern: 14 Bolts
✅ Compatible Vehicles
GM Heavy Duty Trucks
2020–2025 Chevrolet Silverado 2500HD / 3500HD
2020–2025 GMC Sierra 2500HD / 3500HD
RAM Heavy Duty Trucks
2019–2024 RAM 2500 / 3500
⚠️ IMPORTANT FITMENT NOTE
Only fits vehicles equipped with AAM 11.5" or 12" 14-bolt rear axle
❌ NOT compatible with:
AAM 10.5"
Dana rear axles
Ford 10.25 / 10.5 / 8.8
GM 9.5" or 10-bolt axles
Please verify axle type before purchase (check axle tag, build sheet, or OEM differential cover bolt count)
Year
Make
Model
Engine
2019-2024
Ram
2500 Pickup
6.4L HEMI V8
2019-2024
Ram
2500 Pickup
6.7L Cummins Turbo Diesel
2019-2024
Ram
3500 Pickup
6.4L HEMI V8
2019-2024
Ram
3500 Pickup
6.7L Cummins Turbo Diesel
2020-2025
Chevrolet
Silverado 2500HD
6.6L Duramax Diesel
2020-2026
Chevrolet
Silverado 2500HD
6.6L V8 Gas
2020-2025
Chevrolet
Silverado 3500HD
6.6L Duramax Diesel
2020-2026
Chevrolet
Silverado 3500HD
6.6L V8 Gas
2020-2025
GMC
Sierra 2500HD
6.6L Duramax Diesel
2020-2025
GMC
Sierra 2500HD
6.6L V8 Gas
2020-2025
GMC
Sierra 3500HD
6.6L Duramax Diesel
2020-2025
GMC
Sierra 3500HD
6.6L V8 Gas
---tab Description---
Upgrade your rear differential protection with the SPELAB Heavy-Duty Differential Cover, engineered specifically for AAM 11.5"/12" 14-bolt rear axles found on GM and RAM heavy-duty trucks.
Designed for towing, hauling, off-road, and daily heavy use, this cover offers superior durability, improved heat dissipation, and easier maintenance compared to the factory stamped steel cover.
Key Features
Heavy-Duty Construction
Built from high-strength material to withstand impacts, debris, and harsh off-road conditions.
Improved Heat Dissipation
Reinforced design helps reduce differential oil temperature during towing and long-distance driving.
Direct Bolt-On Design
Precision-machined to match OEM 14-bolt pattern – no drilling or modification required.
Leak-Free Sealing
Machined sealing surface ensures a proper gasket fit and long-term oil retention.
Innovative points:
1. The external heat sink design increases the contact area between the differential cover and the surrounding air, enhancing heat dissipation performance.
2. The internal diversion groove design aligns with the direction of liquid flow in the differential gear's rotation, ensuring maximum flow rate for better lubrication.
3. The use of aluminum alloy material significantly improves cooling performance compared to the commonly used iron material. When comparing billet to cast products, billet items are often considered more durable and built for long-lasting performance.
4. An external observation mirror with a floating ball is used to monitor the oil level. Traditional observation mirrors in the market may darken over time, reducing visibility. Therefore, the floating ball allows us to monitor the oil level even if the mirror darkens.
---tab Blog & Video---
Video
First Purchase: 6.0L Power Stroke with SPELAB Differential Cover: 800+ HP Performance Upgrade, Full-System Modification Tested!
Performance Upgrade Installation Guide
RAM Series SPELAB Differential Cover Installation Overview｜Installation Process + Real-World Feedback
Failure Prevention Installation Guide
SPELAB Differential Cover 6.0 POWERSTROKE Installation Process + Real-World Feedback
Failure Prevention Installation Guide
The Differential Cover Upgrade Every Truck Owner Needs
Comparison Video Repair Guide
SPELAB Differential Cover User Experience: High Strength + Easy Maintenance
Comparison Video Repair Guide
Dodge / RAM SPELAB Differential Cover—truck build just got a serious boost
Comparison Video Repair Guide
×
---tab Shipping---
• Fast Shipping Policy:
The order will be dispatched within 1-2 business day, and the package will arrive within your order's estimated date. Please click Shipping Policy for more details.
• Easy Return Policy:
Every order comes with a 14-day free return which means you don't have to pay for a return slip. Please click Return Policy for more details.
SPELAB Auto Parts: 1 year from delivery; supplier conditions apply. SPELAB offers a one-year limited warranty from delivery for material/workmanship defects under normal use, original purchaser only, with proof of purchase. Consumables, wear/cosmetic damage, improper installation, alteration, misuse and removal/installation labor are excluded. Approved remedies are repair, replacement or replacement parts at SPELAB’s discretion.
Return and warranty information is based on what SPELAB Auto Parts offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
SPELAB Auto Parts warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what SPELAB Auto Parts offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Professional installation is recommended.
- Return eligibility
- SPELAB allows return requests within 30 days of delivery, with authorization and undamaged goods, original packaging and accessories. Tuners are final sale. Customer pays voluntary return shipping; original shipping is not refunded. SPELAB pays return shipping for approved damaged, incorrect or manufacturing-defective items. Transit damage must be reported within two business days and incorrect items within seven days. Based on what SPELAB Auto Parts offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- SPELAB Auto Parts
- Warranty duration
- 1 year from delivery; supplier conditions apply
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- SPELAB Auto Parts
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.