2005-2009 Mustang Information on The S197 {Gen1}

Hesitation on the 2-3 shift @ high RPMs

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Old 12/18/06 | 08:04 AM
  #1  
tdbrown75's Avatar
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From: Dallas, TX
Hesitation on the 2-3 shift @ high RPMs

I think I am having a problem with the shifts on my Automatic 06 Mustang GT, and wanted to see if this is something that you guys are familiar with before I consider de-modding to see if the issue occurs in stock form. I’m getting a bit of a hesitation on shifts under moderate/heavy acceleration. This only happens under certain conditions otherwise the shifts are silky smooth. Under normal driving conditions or even at WOT this problem does not occur.

The problem occurs when I give the car enough gas to rev to the higher RPM ranges (4500-5000) before the car shifts. Just after shifting, I am getting what feels like a hesitation once the RPMs drop down to the 2800-2900 RPM range. This is the only hesitation I notice on this car. It’s a very brief feeling, not like the fuel pump hesitation I have felt in the past. It seems not to matter how much gas I have, whether I have just turned, and it is not related to a long cruise.

I had not noticed it until recently, but with me I pretty much drive either in old lady mode or at WOT so the problem may have been occurring for a while now. I’m wondering if this is something anyone else has experienced, if this is normal behavior when firming up the shift points with a tune, or if I need to de-mod and get the car checked out.

Thanks!

Tim
Old 12/18/06 | 02:29 PM
  #2  
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Accidental
Old 12/18/06 | 02:29 PM
  #3  
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From: New Jersey
Turn off the traction control and see if that helps. Sounds like it may be interfereing.
Old 12/18/06 | 05:13 PM
  #4  
tdbrown75's Avatar
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From: Dallas, TX
No dice, turning the TC off did not seem to do anything to make a difference.
Old 12/21/06 | 04:51 AM
  #5  
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Would you say that the transmission is confused about whether or not to do the WOT upshift or is it just hesitating?
Old 12/21/06 | 04:56 PM
  #6  
tdbrown75's Avatar
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I am happy to report that my new 93 Octane Race tune from Doug has completley resolved my issue! Add me to the bama-converts club.

Tim
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