1sickEXchp1988
Member # 11451
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posted
i installed a 2003 mach1 engine/wiring harness and pcm into my 2001 GT with an autotrans, the mach1 was also an auto, however the trans doesnt shift out of 2nd for somereason. ive checked fluid level. all electrical connections, did not have any problems with the shifting before. would a tuner be needed to correct this problem? or perhaps changing the speed sensor since the mach1 has different gears stock over the GT gears. anyhelp would be great. thank you
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