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2009 2500 Dodge Diesel Auto Tran 4x4

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Old May 14, 2016 | 08:09 PM
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Big Earl's Avatar
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Default 2009 2500 Dodge Diesel Auto Tran 4x4

I have a PPEI tuner installed which I don't think is causing my problem.
My transmission when in tow haul mode is not shifting properly. It goes from 1st to 4th gear skips 2&3. Luckily I was close to home. Reflashed then it works until next time. It's only happened 2 times. Any help is appreciated!
 
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