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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-KIT | 9" Housing (3" - 1/4" Wall Tube) | 70lbs. | $471 |
| 144021-1-KIT | 9" Housing (3" - 3/8" Wall Tube) | 82lbs. | $524 |
| 144050-1-KIT | 9" Housing (3.5" - 1/4" Wall Tube) | 75lbs. | $524 |
| 144049-1-KIT | 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
$0.00
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.
- Rock Assault Trail Nine Brake Caliper Mount 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-KIT, $1154
- Rock Assault™ Trail Nine Roller Kit, 3"-3/8" Wall, 144077-KIT, $1254
- Rock Assault™ Trail Nine Roller Kit, 3.5"-1/2" Wall, 144104-KIT, $1354
- Rock Assault™ Trail Nine Roller Kit, 3.5"-3/8" Wall, 144105-KIT, $1454
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-KIT, $28
- 9" Seal Housing, 3" x 1/4" Wall, 144041-KIT, $28
- 9" Seal Housing, 3 1/2" x 3/8" Wall, 144042-KIT, $28
- 9" Seal Housing, 3 1/2" x 1/4" Wall, 144043-KIT, $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-KIT, $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-KIT, $335
Unit Bearing Pocket
$0.00
3 inch O.D. Unit Bearing Pockets
3.5 inch O.D. Unit Bearing Pockets
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.
Due to popular demand, Trail-Gear is now offering our Unit Bearing Pockets for 3.5 inch tubing. Just like our 3” Unit Bearing Pockets, the 3.5 Unit Bearing Pockets are forged from 1035 steel, precision machined and heat-treated for maximum strength and durability. They have been specially designed to accommodate the larger tubing without sacrificing any strength.
Available Options:
- Unit Bearing Pocket, 3" O.D. 144048-KIT, $104 Each
- Unit Bearing Pocket, 3.5" O.D. 144101, $104 Each
Solid Axle Hubs
$0.00
Due to overwhelming demand from our customers, Trail-Gear has manufactured a much needed OEM replacement component, and filled another need in the Toyota off-roading industry. Trail-Gear is very proud to offer brand new hubs for solid axle Toyota Pick-ups and 4Runners. Trail-Gear is the first manufacturer to produce this part since Toyota themselves! These hubs are forged and fully machined from 4130 Chromoly steel making them much stronger than Toyota’s original cast steel version. The Trail-Gear Solid Axle Hubs are brand spankin’ new, not refurbished junkyard hubs.
The Trail-Gear Solid Axle Hub is available in two versions: a direct OEM replacement for use with locking hubs; or a version that is pre-drilled for use with Trail-Gear’s Creeper Flanges. The direct OEM replacement comes drilled and tapped with 2 dowel pins pressed in. The Creeper Flange hub comes drilled and tapped with 6 dowel pins pressed in for use with Trail-Gear’s Creeper Flange. Trail-Gear Solid Axle Hubs can be purchased individually or in a set of two.
Looking for Front Wheel Studs? We recommend these: TG Front Wheel Stud
Available Options:
- Trail-Gear Solid Axle Hub-Creeper Flange style, 140435-1-KIT, $149 each
- Trail-Gear Solid Axle Hub-OEM Replacement, 140436-1-KIT, $149 each
- Trail-Gear Solid Axle Hub-Creeper Flange style, 140448-1-KIT, $250 pair Introductory pricing!
- Trail-Gear Solid Axle Hub-OEM Replacement,140449-1-KIT, $250 pair Introductory pricing!
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-KIT, $28
- Rock Assault Inspection Plug Kit - Installed, 140188-1-KIT, $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-KIT, $28
Creeper Breather - Differential Breather Kit
$21.00
Prevents dirt, debris and water from getting in to your axle through the stock axle housing breather. Expands and contracts to accommodate increase or decrease in housing pressure. Kit includes one housing fitting, clamp and bellows (as shown). Easy installation takes just a few minutes. No hoses to route. Fits all Toyota Pickup / 4Runner solid axle housings (front or rear).
Note: This product is not compatible with the Trail-Gear rear axle 4 link upper link mount kit.
Differential Breather Kit, $21, 140207-1-KIT
