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Message: [QUOTE="Boosted6.4, post: 1316540, member: 12754"] Got GH race files from PSE (Great people, super helpful) today for my 6.4. The truck is currently in KEM 250 programmed from another tuner that was stolen. I have since purchased an x4 and had the GH tunes written for. After programming the race, the truck loses all forward gears, acts like a trans brake. Reverse, has harsh engagement but works. Before installing GH file the "Trans SWPN" was 7U7A-14C337-AD. After installing GH race the "trans SWPN" is 8C3A-14C337-DB. Could my issue be the tune is written for wrong trans code? Returning the x4 to "stock" aka the KEM file that was on the truck prior to tuning results in the trans and everything working again. Or is my problem tuning over the original KEM file and using that as my stock file? I luckily still have my stock file from my livewire if need be. All help is appreciated! Sent from my iPhone using Tapatalk [/QUOTE]

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