TeraFlex Dana 44 Rear HD Differential Cover | Ford Bronco (2021-2025) | P/N 3990844

If you or a buddy has ever peeled the rear diff cover back on a boulder, you already understand the value of real protection. The TeraFlex HD Rear Differential Cover is built from massive 3/8” thick ductile iron to shrug off the kinds of hits that leave lesser covers leaking on the trail.

Designed specifically for the Bronco M220 (Dana 44 Advantek) rear axle, this cover not only protects your gears and seals but also includes a large upper fill/inspection port for easy maintenance and a dedicated fluid level port to fine-tune oil levels—especially handy on lifted rigs with steeper pinion angles. Finished with a durable, high UV–resistant powder coat, this cover is made to take abuse and look good doing it.

Specifications

• Install time: 1 Hour

Fitment

• Ford Bronco (2021-2025)

Part Numbers

• MPN 3990844 · UPC 843885074656