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Rock Assault™ Trail Nine Axle Housing
$471.00
After years of competition testing and engineering, we are confident that The Rock Assault™ Trail Nine 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 are so sure that this is the best axle housing in the industry, we are backing it up with our world famous no questions asked warranty.
We started with a 1/4" formed shell for the center section. Then we attached a 1/2" face plate. Finally, we connected the DOM axle tubes to the center section with the industry's first 3-Point Attachment System™, giving the tubes superior support and engagement into the center section. Axle housing is shipped with inner axle seal and seal housing.
| Part Number | Description | Weight | Price |
|---|---|---|---|
| 144022-1-K | 9" Housing (3" - 1/4" Wall Tube) | 70lbs. | $471 |
| 144021-1-K | 9" Housing (3" - 3/8" Wall Tube) | 82lbs. | $524 |
| 144050-1-K | 9" Housing (3.5" - 1/4" Wall Tube) | 75lbs. | $524 |
| 144049-1-K | 9" Housing (3.5" - 3/8" Wall Tube) | 84lbs. | $576 |
Note: For an additional $75, we will install the inspection hole kit in the location shown.
Rock Assault™ Trail Nine Rear Axle Housing w/Unit Bearing Pockets
$734.00
The Rock Assault Trail 9 is now available as a complete welded assembly from Flange to Flange including the Unit Bearing Pockets The new Trail 9 is available in 3 great sizes to fit all applications. Designed for Wheel Mount Surface’s (WMS) of 60”, 65”, and 68”. We have made it easier for your axle upgrade, or custom build. The assembly will also include the inner housing seals. Housing accepts standard and high pinion differentials. We are so confident our Trail 9 is the strongest on the market that we are backing the product with our legendary No Questions Asked Warranty.
*Custom sizes available. Please call to place your order for a custom-size axle housing.*
NOTE: WMS (Wheel Mount Surface Dimensions) reached using TG Unit Hub, TG# 144012-K, and 1/4"Brake Hats. Using other components will vary final results. Pinion is offset 2.125 to allow for same size axle shafts for passenger, and driver side.
Rock Assault™ Trail Nine Roller Kit
$1,154.00
The Rock Assault Trail 9 Roller Kit is now available. Get started on your build, or upgrade with greater savings. Roller Kits come with:
- Rock Assault Trail 9 Axle Housing (Choice of tubing 3” ¼” Wall, or 3” 3/8” Wall)
- Unit Hubs (lug nuts included)
- Unit Bearing Pockets
- Rock Assault 9” Seal Housing Kit.
Build with confidence knowing this housing has been tested on the Trail Gear “Moon Buggy”. Look for it on the newest Trail Gear Competition Buggy, “Tweaky”. We are so confident our Trail 9 is the strongest on the market that we are backing the product with our legendary No Questions Asked Warranty.
Available Options
- Rock Assault™ Trail Nine Roller Kit, 3"-1/4" Wall, 144076-K, $1154
- Rock Assault™ Trail Nine Roller Kit, 3"-3/8" Wall, 144077-K, $1254
Note: For an additional $75, we will install the inspection hole kit in the location shown.
Rock Assault™ 9" Seal Housing Kit
$28.00
Trail-Gear’s 9" Seal Housing Kit is machined from billet aluminum, has three o-rings on the outer surface of the seal housing, and has a double seal on the inside. The three outer o-rings keep the outer portion of the seal housing sealed up so that no fluid can leak or flow between the axle tube and the seal housing itself. The seal housing is tapered on the inside so that the axle shaft is lined up with the seal housing as it is installed to prevent damage to the seals or seal housing. The seal housing itself is secured in place with a set screw so that it cannot move or be pushed out of place when the axle shafts are installed. The inside of the seal housing has two seals installed to ensure that even while rock crawling on your side or racing at high speeds, no fluid leaks through or bypasses our seals. This will keep your fluid in your differential where it belongs, and not on your breaks and tires where it can create a dangerous situation.
The seals themselves are manufactured from a specially blended, high performance synthetic rubber that is so flexible that they can effectively seal any axle deflection, axle misalignment, or axle run out issues that may occur. The seal housing is shipped completely assembled with both seals installed, and replacement seals are also available, making the seal housing completely rebuildable. Our 9" seal housing will accommodate a 27 spline to a 35 spline axle shaft.
Seal housings are sold separately and two are needed to complete one axle housing. Seal housings are available for 3" and 3 1/2" tubing with either 1/4" or 3/8" wall thickness, and fit most of the popular aftermarket 9" axle housings being offered.
Available Options:
- 9" Seal Housing, 3" x 3/8" Wall, 144040-K, $28
- 9" Seal Housing, 3" x 1/4" Wall, 144041-K, $28
- 9" Seal Housing, 3 1/2" x 3/8" Wall, 144042-K, $28
- 9" Seal Housing, 3 1/2" x 1/4" Wall, 144043-K, $28
Rock Assault™ 9" Inner Axle Seals
$7.35
Replacement seal for Trail-Gear's Rock Assault™ 9" Seal Housings. Also fits in all popular 9" seal housings.
These seals are manufactured from a specially blended, high performance synthetic rubber that is so flexible that they can effectively seal any axle deflection, axle misalignment, or axle run out issues that may occur. Seals axle shaft diameters from 27 to 35 spline.
Sold individually.
Rock Assault™ 9" Inner Axle Seals, 144020, $7.35
Rock Assault™ Trail Nine Brake Caliper Mount Kit
$59.00
The Trail 9 Caliper Mount Kit is a bolt on kit that’s easy to install. It allows you to mount Wilwood Dynalite Calipers MFR# 120-4993 on the Trail-Gear Unit Bearing Pockets. Fits Spidertrax: 5 & 6 Lug Hat, and Spidertrax: 14” Rotor. (Min 17” wheel required.)
Rock Assault™ Trail Nine Brake Caliper Mount Kit, 144094-K, $59
Unit Hub
$335.00
These unit hubs are not just another after market 1-ton unit hub that has been machined down and modified from an 8 lug to a 6 lug application. Trail-Gear has designed this unit for a specific application, so these 1-ton unit hubs will bolt right onto your Dana 60 or 9" housing that are set up for unit hubs. They are made to accommodate a 30 or a 35 spline axle shaft and use a 1/2-20 threaded wheel stud with a 6x5.5 wheel bolt pattern.
These are the same unit hubs that you will see on most competition buggies. They are ultra strong and easy to replace. Simply unbolt the old one and bolt on the new replacement hub. This is a much simpler and stronger unit then the stock spindles that they replace. All unit hubs include integrated roll pin to prevent the spindle nut from coming loose.
Unit Hub, 144012-K, $335
Unit Bearing Pocket
$104.00
Looking for a user friendly and affordable way to get your D60 or 9" axle housing built without sourcing used spindles from the junk yard? Unit bearings are the answer.
They are affordable, tough, and easy to install and maintain. The issue then becomes finding an affordable flange or bearing pocket that you can weld onto the end of your axle tube so that you can simply bolt your unit bearing in place. Trail-Gear's answer to this problem is our unit bearing pocket.
Trail-Gear's unit bearing pockets are designed to be a slip fit onto a 3" O.D. axle tube. They are forged from 1035 steel, precision machined, and heat treated for maximum strength and durability.
Unit Bearing Pocket, 144048-K, $104 Each
Rock Assault™ Front Axle Housing
$776.00
Front Housing with 3-Link Panhard Bracket
See video of our front housing
in action with Snake Racing
Trail-Gear is proud to introduce the newest addition to the Rock Assault™ Axle Housing family, our Rock Assault™ Front Axle Housing. This exclusive axle design is the first in the industry to be released with all new parts. That's right, our axle housing is not made with 30-year-old used knuckle balls. Our knuckle balls are forged from 1035 steel, making them much stronger than stock, eliminating closed or bent knuckle balls.
The axle tubes have been offset above the housing centerline, so the inner axles ride near the bottom of the axle tubes rather than in the center. The result is an increase of 3/8" in ground clearance under the axle tubes. The axle tubes are made from 5/16" thick 1020 DOM tubing with an outer diameter of 3". The short side of the axle tube has been lengthened by 3", making the axle IFS width, so there is no need to run wheel spacers. A 27 or 30 spline short side chromoly axle shaft will be supplied with the axle housing.
The heavy-duty, press formed, 1/4" plate steel center section is shaved to give you 3/4" of additional ground clearance under the differential. The differential mounting surface is made from 1/2" plate steel to ensure studs can not pull out, even under heavy loads. Our housings are precision alignment checked using start-of-the-art, 3D digital imaging equipment to ensure that all Rock Assault™ Axle Housings are 100% straight and true.
The Rock Assault™ Front Axle Housing will come in your choice of bare tubes, with spring perches installed, or 3-link ready with a panhard bracket included. For an additional charge we can install an inspection cap making inspecting your front ring and pinion a breeze. Axle housing is shipped unpainted and lightly oiled to prevent rust during shipping and storage.
59" from WMS to WMS.
Available Options:
- Rock Assault™ Front Axle Housing, w/Short Side Truss Only, 140275-1-K, $776
- Rock Assault™ Front Axle Housing, w/Spring Perches, 140267-1-K, $776
- Rock Assault™ Front Axle Housing, w/3-Link Panhard Bracket, 140274-1-K, $776
- Rock Assault™ Front Axle Housing, w/Short Side Truss Only, E-Locker, 140287-1-K, $776
- Rock Assault™ Front Axle Housing, w/Spring Perches, E-Locker, 140288-1-K, $776
- Rock Assault™ Front Axle Housing, w/3-Link Panhard Bracket, E-Locker, 140289-1-K, $776
Note: When using a Rock Assault™ Front Axle Housing with our Front 3-Link Kit, you cannot use hi-steer. Axle comes with your choice of a 27 spline or 30 spline short side axle shaft.
Rock Assault™ Left-Hand Drop Front Axle Housing
$723.00
Rock Assault™ High Steer Kit does not fit Tacoma applications.
Our Rock Assault™ Left-Hand Drop Front Axle Housing works great for 95 1/2 - 04 Tacomas with left-hand drop t-cases.
Does not come with short side shaft. 59" from WMS to WMS. Center pin width on all of our front housings is 29'' from spring perch to spring perch.
Available Options:
- Rock Assault™ Front Axle Housing, Left-Hand Drop, Bare, 140284-1-K, $723
- Rock Assault™ Front Axle Housing, Left-Hand Drop, w/Spring Perches, 140285-1-K, $723
- Rock Assault™ Front Axle Housing, Left-Hand Drop, Bare, E-Locker, 140290-1-K, $723
- Rock Assault™ Front Axle Housing, Left-Hand Drop, w/Spring Perches, E-Locker, 140291-1-K, $723
Rock Assault™ Rear Axle Housing
$440.00
Electric Locker Version Available
The axle tubes are now made from 5/16" thick, high strength DOM tubing and engage 5/8" farther into the center section. On top of that, there is a 360° gusset welded around the tubes on the inside of the housing to ensure unparalleled strength.
Trail-Gear introduces a new concept to the axle housing design. This exclusive design features axle tubes that have been offset above the housing centerline. The inner axles ride near the bottom of the axle tubes rather than in the center. The results are an increase of 3/8" ground clearance under the axle tubing.
The heavy-duty, press formed, 1/4" plate steel center section shell is specially shaped to ensure a minimum of 3/4" additional clearance under the differential. The differential mounting surface is made from ½” plate steel to ensure studs can not pull out, even under heavy loads. The outer offset flanges are made from 4130 Chromoly to prevent distortion or bending. Housings are precision aligned using start-of-the-art, 3D digital imaging equipment.
The Rock-Assault™ axle housings use stock or aftermarket 1986-1995 Toyota Pickup/4Runner axle shafts. An optional fill / inspection cap can be installed for an additional fee.
Overall housing length is 51 3/8" mounting flange to mounting flange. Empty housing is 54 lbs. Includes drain plug. Spring perches, shock mounts, and vent not included. Differential stud kit and RTV silicone are included and are recommended for use with this axle. Unpainted bare-metal, oiled finish to prevent rusting. We recommend that you degrease the housing inside and out before installation and painting.
The original design concept for this axle was created by Jason (Locktup) Stanley. This rugged, high clearance design proved to be extremely tough and helped Team Trail-Gear win first place in the 2007 We-Rock F-Toy Series. Thanks Jason!
Check out the Rock Assault™ Rear Axle Housing in Four Wheeler magazine.
Available options:
- Rear Axle Housing, IFS width, $440, 140187-1-K
- Rear Axle Housing, IFS width, Electric Locker Style, $440, 140210-1-K
- Rear Tacoma Axle Housing, $440, 140211-1-K
- Rear Tacoma Axle Housing, E-Locker Style, $440, 140212-1-K
Rear Axle Bearing Pocket
$40.00
Sold Individually
These rear axle bearing pockets fit most Toyota Pickup and 4Runner axles made from 1979 to 1995. This bearing pocket is made from 4340 chromoly and allows you to use our rear Toyota or Samurai Rock Assault™ axle housings with an aftermarket disc brake kit (coming soon). No junk yard or used parts are required.
Before we made this product you would have to steal the bearing pockets from another rear axle in order to use our Rock Assault™ housings. Now you can build a completely new axle with no used parts whatsoever (after market disc brake kit required). These bearing pockets are sold individually, two are required to build one rear axle housing.
Rear Axle Bearing Pocket, 140194-1-K, $40
Tie Rod
$68.00
Our heavy duty tie rods. Made from 1.25" x .250" wall DOM tubing. Precision tapped. Left side thread mark. Each rod is test fitted to ensure rod ends thread in with correct fit. Powder coat black finish. Fits 79-95 Pickup/4Runner with crossover steering. Tie rod length is 41.5".
When installing a Rock Assault™ Front Axle Housing and using a hi steer kit, a longer drag link and tie rod will be required to compensate for the axle housing being 3" longer then a stock housing. If you already have a hi steer kit you can simply purchase the longer drag link and tie rod, but if you are buying the Rock Assault™ Front Axle Housing and the Rock Assault™ High Steer Kit at the same time you can purchase them altogether on the high steer kits page.
Available Options:
- Standard Length, 41.5", 130588-1-K, $68
- Rock Assault™ Length, 44.5", 140265-1-K, $68
- +5" Length, 46.5", 130323-1-K, $68
Drag Link
$68.00
Our heavy duty drag links. Made from 1.25" x .250" wall DOM tubing. Precision tapped. Left side thread mark. Powder coat black finish. Fits 79-95 Pickup/4Runner with crossover steering. Drag link length is 33.5".
When installing a Rock Assault™ Front Axle Housing and using a hi steer kit, a longer drag link and tie rod will be required to compensate for the axle housing being 3" longer then a stock housing. If you already have a hi steer kit you can simply purchase the longer drag link and tie rod, but if you are buying the Rock Assault™ Front Axle Housing and the Rock Assault™ High Steer Kit at the same time you can purchase them altogether on the high steer kits page.
Available Options:
- Standard Length, 33.5", 130589-1-K, $68
- Rock Assault™ Length, 35", 140266-1-K, $68
- +5" Length, 39.25", 130322-1-K, $68
Rear Axle Upper Link Mount
$135.00
We can also set up your rear Rock Assault axle housing with an upper link mount kit. This bracket is designed to accommodate 1.25" Creeper Joints. The upper link mount kit can be ordered loose as a do-it your-self install, or it can be ordered installed onto a housing if you are ordering a housing at the same time.
Note: This bracket is cut to fit the Trail-Gear Rock Assault rear axle housing and will not fit a factory stock rear housing. This product is not compatible with the Trail-Gear "Creeper Breather" diff vent kit.
Available options:
- Axle Housing Upper Link Mount Bracket - Loose, $135, 111261-1-K
- Axle Housing Upper Link Mount Bracket - Installed, $188 140189-1-K
Fill/Inspection Cap
$28.00
Extra large differential fill and inspection cap. Designed to allow quick access for inspecting the ring gear. Features 1.5" diameter access hole. Threaded aluminum cap uses a rubber o-ring for a tight seal. Installation requires cutting a hole in to the top of the differential housing and welding on a threaded bung. Kit includes: one threaded bung, one cap and one o-ring. Plug kit can be ordered loose as a do-it your-self install or it can be ordered installed into a housing if you are ordering a housing at the same time.
Available options:
- Rock Assault Inspection Plug Kit - Loose, 140184-1-K, $28
- Rock Assault Inspection Plug Kit - Installed, 140188-1-K, $79
Rock Assault™ Steering Stops
$28.00
A good set of steering stops is critical so that your steering does not over travel and damage other steering or axle components. Our Rock Assault™ steering stops are machined from solid billet so you will never have to worry about smashing or distorting them. The Rock Assault™ Steeing Stops are designed for our Rock Assault™ Front Axle Housing, but they will fit on any axle hosuing. Kit contains 4 steering stops. Some minor grinding may be required during installation.
Rock Assault™ Steering Stops, 140273-1-K, $28
Rock Assault™ Front Axle Truss
$28.00
The Rock Assault™ Front Axle Truss will weld onto the top of your Rock Assault™ Front Axle Housing for extra protection against bending during competition or other extreme applications. The Rock Assault™ Front Axle Truss will not only give you the peace of mind that your Rock Assault™ Axle Housing will last a lifetime, but it adds a sharp durable look to the axle housing.
Some minor grinding and clearancing may be required for correct fitment.
Rock Assault™ Front Axle Truss, 110167-1-K, $28
Rock Assault™ Front Three Link Pan Hard Bracket
$95.00
Our Rock Assault™ Front Three Link Pan Hard Bracket will allow you to use your current Trail-Link Three™ Front 3-Link Kit with your new Rock Assault™ Front Axle Housing. If you are ordering the Trail-Link Three™ Front 3-Link Kit at the same time as you are ordering the Rock Assault™ Front Axle Housing, simply choose the correct option for the Rock Assault™ Front Pan Hard Bracket, not the OEM axle pan hard bracket.
Rock Assault™ Front Three Link Pan Hard Bracket, 110174-1-K, $95
Rock Assault™ Front Axle Shock Mounts
$17.00
These shock mounts are designed to weld directly on to the Rock Assault™ Front Axle Housing. Sold as a pair.
Rock Assault™ Front Axle Shock Mounts, 110175-1-K, $17 Pair
