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2011 GT500 TSB - Steering update


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#31 OFFLINE   2010KonaBlueGT

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Posted 11 October 2010 - 10:43 AM

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Reprogram the Electric Power Assisted Steering (EPAS) Power Steering Control Module (PSCM) module to the latest calibration using IDS release 67.06 and higher. This new calibration is not included in the VCM 2010.5 DVD. Calibration files may also be obtained at www.motorcraft.com.


I've been wondering if the aftermarket tuners are going to start coming out with tunes for the steering on the EPAS cars!

It could be tuned for "track" or "street" or "superspeedway" or "short track" or whatever.....no more changing boxes to get a different ratio like the big boys have to do. Want more feedback? It can be tuned in. Want less? Same thing.

It will be interesting to see who figures it out first.


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#32 OFFLINE   randymarble

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Posted 11 October 2010 - 01:48 PM

Curious if this download replaces the entire program on the ECU. I've had mine reprogrammed with the smaller pulley. Was hoping not to have issues come up that involved the dreadded reflash.
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#33 OFFLINE   Fair

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Posted 07 July 2011 - 06:33 AM

This is the best info I have found on the internet so far possibly about the issue I'm seeing on my 2011 Mustang GT (which uses the same EPAS system as the latest GT500). The video below shows the massive steering feedback/shudder we're seeing:

Posted Image

This video describes and shows visibly what we're seeing in great detail. Is this what you are talking about in this thread?

Thanks,
Terry @ Vorshlag Motorsports

#34 OFFLINE   Fair

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Posted 07 July 2011 - 06:35 AM

double post

Edited by Fair, 07 July 2011 - 06:35 AM.


#35 OFFLINE   steve-o-500

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Posted 07 July 2011 - 11:59 AM

This is the best info I have found on the internet so far possibly about the issue I'm seeing on my 2011 Mustang GT (which uses the same EPAS system as the latest GT500). The video below shows the massive steering feedback/shudder we're seeing:

Posted Image

This video describes and shows visibly what we're seeing in great detail. Is this what you are talking about in this thread?

Thanks,
Terry @ Vorshlag Motorsports


That is what I was experiencing on my car but it was primarily on hard braking for me. It did the exact same thing though.

On a side note....it sounds like you have a rattle snake in the car when it shakes lol
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#36 OFFLINE   Fair

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Posted 07 July 2011 - 12:30 PM

On a side note....it sounds like you have a rattle snake in the car when it shakes lol


Heh, yea, I noticed that rattle too (I never street drive it, and my wife who does must be deaf). That was a loosen front strut top nut - we fixed that the next day here at the shop.

After posting video this on several forums it looks like there's a good number of 2011 Mustang GT and GT500 people have the same issue, but not all to the same degree. De-modding the car next week and taking it to the dealer for that TSB reflash on the EPAS.

Thanks,

Terry @ Vorshlag Motorsports

Edited by Fair, 07 July 2011 - 12:37 PM.


#37 OFFLINE   steve-o-500

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Posted 07 July 2011 - 04:36 PM

Heh, yea, I noticed that rattle too (I never street drive it, and my wife who does must be deaf). That was a loosen front strut top nut - we fixed that the next day here at the shop.

After posting video this on several forums it looks like there's a good number of 2011 Mustang GT and GT500 people have the same issue, but not all to the same degree. De-modding the car next week and taking it to the dealer for that TSB reflash on the EPAS.

Thanks,

Terry @ Vorshlag Motorsports


No problem Terry.
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#38 OFFLINE   BIKEBOY

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Posted 08 July 2011 - 05:44 AM

WTH is a 'nibble'?

Who comes up with this $hit? :headscratch:
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#39 OFFLINE   madmach

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Posted 08 July 2011 - 07:05 AM

I opened the .PDF and the verbiage contains some build date specifics:

ISSUE OPERATION DESCRIPTION TIME
Some 2011 Mustang Shelby GT500 vehicles 101604A 2011 Mustang
equipped with a 5.4L engine and built on or before
8/2/2010
may exhibit steering wheel shudder under
heavy braking, steering wheel nibble, or a drift/pull
condition.

I'm just going to double check to make sure that my car is checked out today for the re-flash if needed. I dont know my exact build date.

#40 OFFLINE   Rachane

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Posted 14 July 2011 - 03:25 PM

My dealership did the update today, about 1/2-hour computer download exercise.

Thanks again to fellow Team Shelbyites for bringing this to everyone's attention. :)

#41 OFFLINE   Madlock

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Posted 20 July 2011 - 07:20 PM

I at first believed my car was subject to something squirrely with the EPAS, despite being made 8/20. However, after verifying it had been flashed with the most recent firm/software, I eventually came to appreciate how much was owed to the nature of the tires - both the nature of their composition at various temperatures and the substantial width which makes them seem to ferret-out every road defect.

Once I became more comfortable and convinced that the steering behaved increasingly well as the tires warmed, particularly on well-kept surfaces, I realized it was more a trait than a defect - at least on my post-TSB car.

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#42 OFFLINE   markoesc

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Posted 28 November 2012 - 06:56 AM

Does anyone know if this TSB update remains in the car if a custom tune is loaded at a later time??

#43 OFFLINE   markoesc

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Posted 28 November 2012 - 06:57 AM

I realize this thread has been stagnant for some time, but was hoping to understand if this was the case or not... Thanks for the info thus far!

#44 OFFLINE   Madlock

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Posted 28 November 2012 - 08:09 AM

They're entirely different systems governed by discrete programming. Engine tunes pertain to the PCM (Powertrain Control Module)/ECU (Engine Control Unit) while steering response is part of the BCM (Body Control Module)/ECM (Electronics Control Module) ecosystems.

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#45 OFFLINE   CobraCO

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Posted 08 December 2012 - 10:04 PM

I know this thread is old but glad I found it. I've tracked my car a couple of times this year after buying it earlier this year and have experienced a strong shudder Under heavy braking coming into turn on the track. I thought it was a warped rotor or antilock, but i did not experience any pulse on regular street driving and the shudder or pulse was not as quick as antilock. Will have to take into the dealership this coming spring before tracking the car again to see if this fixes the issue.
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