Billet Aluminum Differential Cover For AAM 11.5"/12" 14 Bolts Rear Axle for 2020-2025 GM and 2019-2024 RAM | SPELAB

✅ 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)

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.

Video

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