Welcome to bulletproofrearsteer.com

Welcome to our website. First and foremost our steering system is intended for off-road use only. Installation should include a switch to turn the system off when driving on the road. We have taken 15 years of research and development from our sister company “AutoBacking Trailer technologies LLC” with our steering Trailer and have developed another industry first, a completely wireless self centering rear steering system. Our patent pending internally valved steering cylinder requires no electronics, for reliability that is unmatched in the industry.

Considering the fact that most off-road vehicles are in some very inhospitable environments, we found that being off road enthusiasts ourselves that a simple rock or branch in the wrong place can ruin your day. Rock Racing and off-road events have always been a favorite past time of our family, but we have seen more than once an off road vehicle with rear steering that should have had a huge advantage turn into a huge disadvantage when the system failed. Our truly bulletproof rear steering cylinder changes the entire game when it comes to reliability. Everything that makes our cylinder self center is inside the cylinder itself. No wires, no sensors, no relays, and no problems.

How it Works

This steering cylinder is unlike anything anyone has ever seen. The piston inside the cylinder is internally valved and actually moves hydraulic fluid through the piston when pressurized by the pump. This design is what allows it to self center once the pump pressure is turned off after making a turn. There are coil springs fixed to the ends of the steering cylinder that will not let it steer unless it generates a considerable amount of hydraulic force. The coil springs return the same force to make the steering automatically go back to center. Resulting in unparalleled safety and reliability. And of course a self centering steering system without any electronics.

Humvee Self Centering Rear Steer Kit

Our first version of our self centering double ended steering cylinder is for the H-1 Humvee/Hummer. Considering that our test vehicle is an H1 and it is one of the only vehicles that we know of that comes from the factory with a rear steering axle. This is the vehicle that inspired us to take on this project in the first place. The H1 cylinder will come with a mounting plate and cylinder ends to fit the factory tire rod ends of the Humvee. We have even found that when our cylinder is mounted with our Humvee mounting plate the factory tire rod ends will work. Just simply remove the factory bushing ends from the rear radius arms and replace them with Humvee tie rod ends. transforming them to tie rod bars.

All off road vehicles

Our second cylinder that we are offering will come with the industry standard off road clevis joint ends that accepts Heim joints commonly used in the off-road industry for offroading rigs.

Installation of rear steering on any vehicle should of course only be done by a professional. Therefore we will not instruct any forms of installation. This is due to the huge range of vehicles and axle components that may be used with our self centering cylinder. Our goal is to provide you with a self centering rear steering cylinder that is easy to install and more reliable than anything ever made. simply mount the cylinder, steering linkage, attach the two hydraulic lines and you’re ready to go.

Installation of Bulletproof Rear Steer

These instructions below are for the installation of the Bulletproof rear steering cylinder behind the rear differential.

Remove rear radius rod Assembly. Fig #1

Remove bushing ends.  Fig#2

Replace them with Humvee right hand thread tie rod ends. Set aside for later.  

Remove steering arm /covers. Fig. #3


Swap one side for the other and reinstall.

Jack rear tires of Humvee off the ground.

Remove the four lower half-inch nuts (of the six) from bolts in crossmember. Fig. 4 You will have to first cut the threads off of the lower two bolts so you can remove them without hitting the brake caliper. You will need to replace them with half inch longer bolts (Grade 8). Insert them in the other direction to attach the mounting plate and cylinder. This might take two people because the cylinder and mount together weighs 60 pounds. Place three (grade 8) washers behind the mounting plate on the top two bolts to make the plate level against the crossmember. Attach your tie rod bars to the end of the steering cylinder and to the steering arms that are now facing backwards.

You will have to purchase a double acting 12 V electric pump That has over 1 gallon per minute flow rate.  We recommend a pump with a two-button remote that can be unplugged and put away when on the street. Fig.5 We mounted our pump underneath the rear seat of our Humvee and drilled holes through the body for our hoses and electrical cable.

Run hydraulic lines to your steering cylinder and a 12 V source to your pump. Push the button on the controller and run fluid through your pump by holding the button down for 10 seconds in each direction. Let the system sit for a couple hours so the air bubbles can float out of the oil after the first pumping of oil through the steering cylinder.

Center your steering by moving it left and right until both coil springs are at equal length. Square up the rear tires with the fenders then measure between tires to make sure they are equal front and rear of the tires. Make sure tie rod strap bolts are facing away from the rims. Carefully cycle steering cylinder left and right and adjust tie rod bars until they are within a quarter inch of the rims at full turn or the cylinder stops bottom out. check and Adjust toe in alignment. Tighten tie rod bar tension straps. Install your steering stop bolts on the front side of the gear hub bottoms. Make them touch the same time the cylinder bottoms out on the stops. Make sure the tie rod bars are not hitting your rims or anything else. Professional alignment may be necessary.

We highly recommend the use of 18 inch or larger aftermarket rims if you are installing our steering cylinder behind the differential. If not, tie rod ends may scrape the factory rims and you may have to limit the turning of the tires to prevent it.

So naturally if you were running bigger tires you will want a high pressure high pump volume pump. Our system works best with a pump with a GPM of 2 gallons or more.

This should be a good project for someone who likes to spend a weekend in the garage like I do.

Fig 1. PST – Rear Radius Rod Asm; Hummer


Fig 2. Bushing Ends for Rear Radius Rod: Hummer

Fig 3.

Fig. 4

Fig. 5     3 Quart 12VDC Dump Trailer Pump


  • Mode: Double-Acting Power-Up/ Power-Down
  • Tank Material: Plastic (Translucent)
  • Tank Capacity: 3L/ 3Quart/ 0.75 Gal
  • Flow: 2.0 GPM
  • Max. Relief Valve Setting A Port: 3200 PSI
  • Max. Relief Valve Setting B Port: 1500 PSI
  • Rated Speed: 2850R/MIN
  • Voltage: DC12V
  • Power: 1.6KW (Rated). 3.0KW (Max)
  • Duty: 3 Min
  • Traffic: 1.1 cc/r
  • Rotation: Clockwise
  • Connector: SAE # 6
  • Mount Position: Horizontal/ Vertical
  • Control: Solenoid and Handheld Pendant
  • Pendant Control Length: 15ft/ 4.5 m
  • Gross Weight: 29.1 lb (13.2 kg)

Steering Cylinder Specifications

  • Double acting, double rod
  • Bore x stroke 2.5″x 10″
  • PSI Max. 3,000
  • Rod Dia. 1.5″
  • Ports SAE 6
This is the tie rod angles of the rear steer when installed in red. Also a picture of the front steering linkage. Notice That they are almost exactly the same.

New Humvee fuel tank. The yellow line indicates the area that needs to be compressed.

Humvee fuel tank heated up and compressed

Required Fuel Tank modifications for front of differential installation

Stock fuel tank must be replaced with a bed mounted fuel tank or a new stock fuel tank must be purchased and modified to make room for the steering cylinder. This procedure should only be done on a new fuel tank. Once done it will allow the steering cylinder to be put in front of the differential. The goal is to get the 6 inches of clearance needed.

The heating and compressing process should only be done on a new fuel tank. We recommend heating The tank to 400° before compressing. And as always with any projects such as this proceed at one’s own risk.

Pump recommendations.

pump pressure (PSI) is always relevant, but with our self centering internally valve system pump volume is important too. So naturally if you were running bigger tires you will want a high pressure high volume pump. Our system works best with a pump GPM of 2 gallon or more.

Steering with Bulletproof Rear Steering.

Our system is more intuitive than most. You push and hold the button down for a turn, the longer you hold the button down the more it turns. when the button is released the system automatically returns to Center. The advantages to this is that it takes care of itself when forgotten. The self centering return time is around five seconds. this is a more natural steering movement, much like using a steering wheel and letting it slip through your hands as you come out of a turn. If you need it to return quicker than that, simply hit the other button for a second or so to return to center faster and it will finish the centering for you. You will find it fun and easy to use just as we did.
Before we installed rear steer on our Humvee, the outside turning radius was 45 feet. After installing BulletProof Rear Steer, our outside turning radius was reduced to 30 feet. We are actually able to run trails used by side-by-side ATVs With ease.

Price for our patent pending internally valved self centering
2.5x10x1.5 Double Rod Hydraulic Steering Cylinder with coil spring assist is
$1,849.00 for the Humvee. This includes the mounting plate and ends that accept the factory tie rod ends.

The cylinder for other off-road applications. No mount, and Clevis ends for use with Heim joints. $1,549.00

If you have any questions feel free to give us a call at 1-352-246-8567 we have a knowledgeable off-road enthusiast ready to take your call.

Please call us to specify  front or rear of diff mount when ordering

Bulletproof Rear Steer Kit with Cylinder


If you are interested in our services, then contact us today by filling out the online form or giving us a call. You can also email us at the following address:

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