HMMWV Rear steer

[shannondeese]

This rear steering system will be ready soon for purchase. Hoping enough people want it to justify the expence of developing it. [media]http://www.youtube.com/watch?v=OBYj8kYgWqo[/media]

 

[SterlingDevelop]

looks like it's sliding around on ice.

pretty cool.

 

[FireFighterHill]

pics of the controls and is this a complete hydraulic system, is it street legal?

 

[KsM715]

Is it disabled over a certain speed? Looks like a wreck waiting to happen with an inexperienced driver at anything over 25mph. Dont get me wrong it looks like fun and would be very useful on tight trails but no use on the street.

 

[Maverick1701]

very cool!
How is it controlled? Joystick? knob? helmet from Firefox that reads your thoughts?

 

[Maverick1701]

found video of controls on his youtube account and yes it locks w/the flip of a switch

[media]http://www.youtube.com/watch?v=beo8RNJZdyQ[/media]

 

[nap159]

chevy trucks and suv's had rear steer for a while. i've never owned one but i imagine it would be a cluster later in the vehicles life...more ball joints and tie rods to go bad...what do you guys think?

 

[Cucvnut]

woot thats great for wheeling !

 

[shannondeese]

It automaticaly disables over 25mph. The controls are easy, just a joy stick and a couple of buttons. The HMMWV allready has the mounts in place for 4 wheel steering. This just replaces the stock brace with a link to an actuator. It is hydraulic and is street legal.

 

[mudguppy]

It automaticaly disables over 25mph. .... It is hydraulic and is street legal.

can you explain how it is street legal? only reason i ask because i am under the impression that a mechanical linkage is required, and i wouldn't expect CA to be any less stringent.

also, i know in the video it said the rear steer is "locked out" via the switch. i would think that the way you say it "disables" is probably more accurate. is there any positive locking device to secure the rear steer linkage?

 

[dilvoy]

That setup has an air actuated pin that locks it in the centered position, so it would be mechanically locked at that point and street legal.

 

[M1075]

Rear steer is awesome! I have it on my rockcrawler and my transport vehicle.

Are there enough HUMMER/HMMWV units around to generate sufficient demand for continued development and production of a quality system? I doubt it. You will need to look to unlce sugar for a real payback.

 

[FlameRed]

Sorry to resurrect an ancient thread. Seems like this is the only thread I could find on it.

Has anyone here installed one of these? I was enchanted with this setup ever since I first got my M998 three years ago. The wife just gave me permission to buy it!

Only thing is I wish I had modified my diesel tank when I replaced it two years ago. It says it can be installed behind the diff? If so, so I still need to modify the diesel tank?

Not sure how it knows you are exceeding 25MPH so it auto disables. What does it tie into to sense that?

Not sure it is still available. I know you have to buy a new tank, and the pump separate, but not sure about hydraulic hoses.

 

[TOBASH]

IIRC, might have been Springer 1991 on the main HMMWV thread.

Haven’t seen him in a while (BUT maybe because I have him blocked).

 

[FlameRed]

It is very odd, @springer1981 does not show up as being active since May. I hope is ok. He is a terrific guy and gave me a lot of great advice that saved me tons of time and $.

The maker of this setup, @shannondeese has not been active for more than year either, but his web site is still online. I tried contacting him but no response.

Looks like I'll just have to keep drooling

 

[TOBASH]

Rear steer is not that difficult, and now that it is appearing in GM vehicles there’s a good chance that you will be able to obtain those parts in several months as they begin to show up in junkyards.

You can also review rear steer from other vehicles listed on the Internet with instructions on how to install.

IIRC, that other member who I have blocked placed his mechanism and then repurposed a turret control switch that he rebuilt to allow rear steer control.

 

[FlameRed]

After drooling about this for a couple of years, I finally put it at the top of the list for this winter's projects.

I just ordered one in advance as he makes them up as needed - no inventory. Looks like it is a $3K project.

There are a couple issues I will have to just work through. One is mounting it on the rear of the diff. I did not want to try to mount it on the front of the diff as that requires the fuel tank to be "melted" and reshaped to get it out of the way. But mounting it in the rear provides three challenges for me:

• The geometry of the rear mount may cause it to rub the wheel at the extremes. I have aftermarket wheels but they still may hit. So wheel spacers, if available, may be necessary.
• Bolting up he mounting plate looks like a PITA. Dealing with the bolts for the calipers need to be cut, 1/2" bigger ones installed in the opposite direction to mount up the supplied mounting plate.
• I have a rear mounted winch and stock winch plate. I hope that does not interfere with it.

Here are a list of the extra bits not supplied:

• Two right threaded tie rod ends.
• A three quart dump truck hydraulic pump. I am told they can mount under the rear seats. These seem to all be 12V so beware.
• Circuit breaker, and power cabling for the pump.
• Hydraulic hoses. Looks like Tractor Supply has a good assortment on the shelf.
• Hydraulic fluid
• I was looking for a joy stick instead of just using the "Up/Down" button that comes with the pump.

I'll post here is a few months with updates.