It sounds to me like you're hitting the Rev Limit. Try to reload your tune, and in the "Custom Options Menu", check the setting for that. It should be called something like "Max RPM" or "Rev Limit". If it's below 5500, move it up to there, but don't go any higher.
With the CS/CTS platforms, you can't adjust the WOT shift points (yet), and I suspect Edge might have them set a bit too high compared to your Rev Limit setting.
The reason you don't want to go higher than 5500 is that you can get Torque Converter ballooning above 5400. The brief period between 5400 and 5500 won't hurt anything though.
- Jack
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