OEM E-Disco (Smartbar) Study - JeepForum.com
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post #1 of 32 Old 12-01-2010, 09:56 PM Thread Starter
ronjenx
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OEM E-Disco (Smartbar) Study

I have been wondering how the Smartbar works, and if it can be successfully disassemble, serviced, and reassembled.

The Smartbar is made by American Axle & Manufacturing.

Mechanically it is pretty simple. It's the computer control and the circuit board that will most likely cause problems. I was hoping to see a way to make it manually operated.

















Here is a picture of the electrical connector. I don't know if anyone has wired in a bypass switch (like the lockers), but it looks like the computer control is too involved.




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post #2 of 32 Old 12-02-2010, 12:32 AM
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Eh. I'd ditch that silly contraption that's not doing you any good when disconnected and get a Currie AR. Nice job on the analysis, though.

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post #3 of 32 Old 12-02-2010, 02:40 AM
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Wow, very impressive ronjenx. Do you just happen to have one lying around or does it belong on your Jeep?
I always wondered how it worked. Great write-up.





Imped, curious why you say its not doing you any good when disconnected. It makes a big difference on my Jeep. It has also been around for several years now with lots of satisfied people. Is it possibly that you have TJ (Iíve had a couple of TJís and like them allot) which of course doesnít have one? I donít need a lesson on how the Currie product works, Iím well aware of that. I also know itís a great product too.

Now just suppose for fun that you had a JK with the Smartbar, would you actually remove it and install a Currie one instead? I think I already know what your answer will be but still go ahead with it.
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post #4 of 32 Old 12-02-2010, 09:05 AM
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If you know how the Currie works (just a torsion bar), then you should understand why being totally disconnected in the front is putting you at a disadvantage. In that situation, your rear sway bar is the only member influencing the behavior of the frame relative to the axles, which causes natural instability. Having a similar member acting on the front of the frame in an equal but opposite manner cancels out that instability, keeping the frame/body neutral relative to the axles. Steep climbs, ruts and off-camber situations are also made much more comfortable due to the extra influence and control. I think it's obvious, but regardless of JK or TJ or 3, 4, or 5 links, link suspensions benefit from having a front and rear sway bar. If I were to purchase a JK Rubi, the FIRST thing I would do is remove and sell the e-sway bar system, purchase a Currie AR, and pocket the rest. Then would come the housing beef, gears, and 37's.

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post #5 of 32 Old 12-02-2010, 09:12 AM
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Have their been problems with the electronics on the disco's?


You know what they say about the interest rate on borrowed trouble.
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post #6 of 32 Old 12-02-2010, 10:28 AM
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Great pics and nice info. Thanks for sharing.

<sold> 2005 WK 5.7L Limited
<sold> 2001 TJ Sport
<sold> 2000 WJ Laredo
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post #7 of 32 Old 12-02-2010, 10:28 AM
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Great write up ronjenx.....

I'm also curious about your supply of parts to disassemble..

All of your studies have been very informative and detailed, thanks....

-- Joel --
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post #8 of 32 Old 12-02-2010, 10:37 AM
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Great write up as always. Reminds me of airframe and powerplant tech classes.
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post #9 of 32 Old 12-02-2010, 10:47 AM
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Quote:
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Great write up as always. Reminds me of airframe and powerplant tech classes.
Who did you get your A&P through?
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post #10 of 32 Old 12-02-2010, 01:20 PM
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Quote:
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If you know how the Currie works (just a torsion bar), then you should understand why being totally disconnected in the front is putting you at a disadvantage. In that situation, your rear sway bar is the only member influencing the behavior of the frame relative to the axles, which causes natural instability. Having a similar member acting on the front of the frame in an equal but opposite manner cancels out that instability, keeping the frame/body neutral relative to the axles. Steep climbs, ruts and off-camber situations are also made much more comfortable due to the extra influence and control. I think it's obvious, but regardless of JK or TJ or 3, 4, or 5 links, link suspensions benefit from having a front and rear sway bar. If I were to purchase a JK Rubi, the FIRST thing I would do is remove and sell the e-sway bar system, purchase a Currie AR, and pocket the rest. Then would come the housing beef, gears, and 37's.
I was contemplating this, BUT would this effect the ESP? Now the computer think there is no sway bar connected. It sucks having 5 computers running your rig.
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post #11 of 32 Old 12-02-2010, 01:28 PM
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great write up! i was suspect of it at first but i feel this system will work fine now! i am sure it can be made manually operated but the ESP may freak out. i don't know if they talk to each other though. i hope not!

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post #12 of 32 Old 12-02-2010, 01:39 PM
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Added to the F.A.Q.
Thanks again Ron
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post #13 of 32 Old 12-02-2010, 04:14 PM
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Who did you get your A&P through?
South Western in Michigan. Small school in the middle of nowhere. They were a diamond in the rough. They since shut down the AMT program from small class sizes.
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post #14 of 32 Old 12-02-2010, 04:19 PM
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I was contemplating this, BUT would this effect the ESP? Now the computer think there is no sway bar connected. It sucks having 5 computers running your rig.
No clue but if so, that SUCKS. Computers FTL.

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post #15 of 32 Old 12-02-2010, 04:34 PM
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It looks like the default position is with the sway-bar fully connected.
Therefore the computer is told when the bar is disconnected and will not receive a signal otherwise.
Thats my guess!
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