Traded a 14 gt that locked out of 3rd at high rpms 50% of time for a 10 gt500 that locks out of second 75% of the time . The whiteline insert helped with gt but didn't fix,and I didn't upgrade shifter because of warranty. I got 12 months bumper to bumper on '10 gt500 I just purchased so should I take it in and have trans rebuilt like others have done ?or is there a better solution Now..again I don't want to upgrade shifter if I'm having transmission problems to give them an excuse to deny. The gt500 has 17k miles on it and the rest of the gears go in smooth as silk
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