"tranny shudder" at 45-50 miles per hour
I am getting "tranny shudder" at 45-50 miles per hour when using 89 performance mode, it doesn’t do it when at stock or when the custom 89 tow tune is used.
I have 2005 5.4
The invoice # is 4469 invoice date is 5/4/2011
Hex RXCM5E4
Any help would be great .
Charlie
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