Overview
The Mag-Hytec AAM 11.5in High Capacity Cover (part AA14-11.5) is a finned aluminum rear differential cover for GM and Chrysler AAM 11.5 inch axles, with room for 5 quarts of gear oil.
Mag-Hytec builds its covers and transmission pans for heavy-duty recreational and service vehicles that need more lubricant and better cooling. This cover is cast from A356-T6 aluminum, textured and powder coated black, with machined cooling fins on the housing. The fins help move heat from the gear oil into the air, which matters when a heavy load keeps the axle working hard.
Finned aluminum covers are a common choice where heat is the concern, because the fins add surface area that helps the oil shed heat. The extra volume also gives the oil more room to work between changes.
Key features
- Finned aircraft aluminum housing for improved cooling
- Holds 2 extra quarts of oil, 5 quarts total
- Overall height of 3 5/8 inches
- Magnetic drain plug that traps worn gear material
- Dipstick with a magnetic insert
- Routine maintenance without removing the differential cover
Gear oil and heavy loads
Axle gear oil carries heat away from the ring gear and bearings, and the amount of oil matters most when the axle works hard. Towing, rock crawling and long grades raise temperatures, so a larger oil volume gives the lubricant more room to shed heat before it breaks down. Finned housings add surface area so heat leaves more easily.
Choose a gear oil suited to the axle and how the vehicle is used, and change it on a schedule that matches your driving. Check the magnetic drain plug and dipstick insert for metal at each service, since heavy buildup can point to gear or bearing wear. Keep mud clear of the fins so airflow is not blocked.
- Use the gear oil type the axle requires
- Inspect the magnetic drain plug at each service
- Keep mud out of the fins
Specifications
| Brand | Mag-Hytec |
|---|---|
| Part number | AA14-11.5 |
| UPC | 70000398451 |
| Material | A356-T6 cast aluminum |
| Finish | Textured black powder coat |
| Axle compatibility | GM and Chrysler AAM 11.5 inch rear axles |
| Oil capacity | 5 quarts total (2 extra) |
| Overall height | 3 5/8 inches |
| Seals | ARP 568 O-rings |
| Hardware | 303 stainless steel |
| Drain plug | Magnetic |
| Dipstick | Magnetic insert |
Vehicle fitment
The cover is made for GM and Chrysler AAM 11.5 inch rear axles, so confirm your axle size and type before ordering.
Installation notes
Mag-Hytec says most applications need no gasket or sealant because of the ARP 568 O-rings. Lift and support the vehicle securely before working under the rear axle.
What’s included
The cover with its magnetic drain plug, magnetic-insert dipstick, ARP 568 O-rings and 303 stainless steel hardware.
Not included: Gear oil.
