Aftermarket rear differential covers have been around for decades. But what effect do they have on your gear oil? What's really going on behind the cover? Gale Banks compares popular high-capacity flat-back units with the new patented Ram-Air rear diff cover for Ford Sterling axles.

Chapters:
0:00 Intro
0:24 Ram-Air diff cover
1:00 Perfect fluid dynamics
1:26 Patented Ram-Air scoops

The new Ram-Air rear differential cover fits the 1985-2020 Ford Sterling Axle 12-bolt with 10.25/10.5 ring gear and is available with Amsoil SEVERE GEAR® Synthetic Extreme Pressure Gear Lube.
https://www.bankspower.com/diffcovers

Available for:
2001-2019 GM and 2003-2018 RAM with 14-bolt AAM 11.5" or 11.8"
1985-2022 Ford Sterling Axle with 12-bolt 10.25/10.5 ring gear
2017+ Ford F250 HD tow pkg and F350 SRW with Dana M275

Coming soon for:
2019+ RAM 2500/3500, 2020+ GM 2500/3500 with 14-bolt AAM axle 11.5", 12" ring gear
1994-2002 RAM 5.9L and 1999-2007 Ford F350/450 with Dana 80 rear axle

Watch the full "Behind the Diff Cover" video series.
   • Differential Cover Development