What aftermarket diff cover guys don't tell you!

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.

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 Chevy/GMC and 2003-2018 RAM with AAM 11.5" or 11.8" 14-bolt rear axle
1985-2022 Ford Sterling Axle 12-bolt with 10.25"/10.5" ring gear
2017+ Ford F250 HD tow pkg and F350 SRW with Dana M275 axle
2019+ RAM 2500/3500, 2020+ GM 2500/3500 with 14-bolt AAM axle, 11.5", 12" ring gear

Coming soon for:
1994-2002 RAM 5.9L and 1999-2007 Ford F350/450 with Dana 80 axle

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

00:00 Intro
00:22 Visual comparison
01:14 Making a clear diff cover
01:40 Analyzing fluid flow with factory fill
05:26 Analyzing fluid flow with overfill level
07:55 Dyno testing fluid temps
08:30 Lack of airflow
09:39 On-road testing
10:27 Test results
11:31 Ram-Air cover explained

Protected by AMSOIL, the leader in synthetics.
https://www.amsoil.com

#differentialcover #diffcover #engineering