Rock Assault Trail Nine Axle Housing 3.5"x1/4" Wall, w/ Inspection Hole
Pick-up in store to earn an extra discount
Financing available with Flexiti
Request an install quote at check-out
See our work in our Install Gallery
Free shipping on orders over $99 (some exclusions)
Rock Assault 9 Axle Housing
After years of competition testing and engineering, we are confident that The Rock Assault 9 Axle Housing is the strongest 9" axle housing on the market. This housing has been tested in W.E. Rock, CalRocs, and King of the Hammers, so we know it will stand up to the toughest terrain on earth.
We started with a 1/4" formed shell for the center section made out of A572 Grade 50 Steel for increased strength. This is a high-strength, low alloy, structural steel plate with a minimum yield strength of 50,000 psi! All of this is attached to an equally strong 1/2" face plate for anchoring the DOM axle tubes. The axle tubes are secured by the industry's first 3-Point Attachment System, giving the tubes superior support and engagement into the center section. We also face the center section to ensure your differential mounts flush against the axle housing to prevent any leaks.
We also redesigned the Rock Assault 9 Axle Housing to allow for the use of both a 9" and 10" differential! This will give you the option to create an even stronger axle and give you that piece of mind knowing you have the strongest axle under your rig..
**MADE IN THE USA**
| Part Number | Description | Weight |
|---|---|---|
| 144022-1-KIT | 9" Housing 3" - 1/4" Wall Tube | 70lbs. |
| 144021-1-KIT | 9" Housing 3" - 3/8" Wall Tube | 82lbs. |
| 144050-1-KIT | 9" Housing 3.5" - 1/4" Wall Tube | 75lbs. |
| 144049-1-KIT | 9" Housing 3.5" - 3/8" Wall Tube | 84lbs. |
| TGI-308796 | 9" Housing 3" - 1/4" Wall Tube With Inspection Hole Kit | 111lbs. |
| TGI-308797 | 9" Housing 3" - 3/8" Wall Tube With Inspection Hole Kit | 111lbs. |
| TGI-308798 | 9" Housing 3.5" - 1/4" Wall Tube With Inspection Hole Kit | 111lbs. |
| TGI-308799 | 9" Housing 3.5" - 3/8" Wall Tube With Inspection Hole Kit | 111lbs. |
Note: The differential bolt pattern on 9" Axle Housings are NOT universal. Please check before cutting or welding
Note: If you are using our Rock Assault 9 Front Axle Housing, you will need to use a 10" ram for your steering setup.
We recommend the addition of our Axle Housing Inspection Hole Kit to allow for easy fluid level and ring gear visibility. Just select "With Inspection Hole Kit Installed" in the drop down menu above. The kit is also available in a DIY installation version (requiring drilling through the differential housing and welding on a threaded bung).
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
