How does the calibration plug work?

The calibration plug is set to the factory oil level. Once you've filled the differential, remove the plug. If oil comes out, you're at the correct level. If not, add more until it weeps from the hole, then reinstall the plug.

What maintenance is required for this differential cover?

The magnetic drain plug should be cleaned at every oil change. Simply remove the plug and wipe off any accumulated metal particles. Inspect the o-ring on the plug and replace if necessary.

Is aFe's deep reach magnetic fill plug required for installation?

No, the deep reach magnetic fill plug is not required. It is an optional upgrade that provides additional protection by capturing even more metallic particles. The stock fill plug will work fine with this cover.

aFe Pro Series GMCH 9.5 Rear Diff Cover Raw w/ Machined Fins 19-20 GM Silverado/Sierra 1500

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aFe

aFe Pro Series GMCH 9.5 Rear Diff Cover Raw w/ Machined Fins 19-20 GM Silverado/Sierra 1500

Name: aFe Pro Series GMCH 9.5 Rear Diff Cover Raw w/ Machined Fins 19-20 GM Silverado/Sierra 1500
Brand: aFe
Price: 317.38 USD
Availability: InStock

$317.38

Increased oil capacity and cooling fins keep your differential running cooler, longer.

Key Features

Increased oil capacity — runs cooler for longer
Internal and external fins — maximize heat transfer to the air
Magnetic drain plug — captures loose particles
Calibration plug — prevents overfilling

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Will this fit your vehicle?

Compatible with 49 vehicles

Need Help?

631-982-0042

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Since 1957

Family-owned

Product Details

This cover has an increased oil capacity over stock for better performance over a longer duration. Built-in internal and external fins transfer heat from the oil to the outside air for maximum cooling. This cover incorporates a magnetic drain plug to capture loose particles for maximum protection. A calibration plug is set to the factory oil level to prevent overfilling. Our optional deep reach magnetic fill plug (PN: 46-00002) is a great addition to combine with this cover.