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  1. Challenger Issues & Problems
    Hi, I have a 2011 3.6L Challenger with 151k miles. As of March, my transmission has started to upshift very slowly through every gear. It would go up to 3000RPM before it decides to go to the next gear, then hangs at 2000-2200RPM while driving. I need to use the auto-stick to manually shift up...
  2. Dodge Challenger R/T Specific
    I am not sure where to start on my issue but it started a month ago I purchased Premium TCM tune from HP, I got the tcm with high hopes after what I have read about AJ . When I got it I installed it and nothing but cel codes about the nag1 and after 5 hours of trouble shooting it with no luck...
  3. Parts For Sale/Wanted/Trade
    SOLD-Tranzformer Gen 1 -$150-SOLD Used Tranzformer Gen 1 for sale. I have gone over to a custom TCM. Everything works as intended, has latest firmware. You will need new T-Taps for installation. Includes a printed set of directions/installation instructions. Generic photo will add actual...
  4. Challenger Issues & Problems
    Hi, Excuse for my English, but i'm a french Canadian. I have a Challenger R/T Classic 2013 with an automatic 5-speeds transmission (NAG1). I have a weird problem the morning after a cold night (above -10 degree Celsius). I know that the transmission have a cold temperature protection, but I...
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