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Hey all. I'm new to the group and a new HD Ram owner. I have a '21 2500 4x4 w/ 6.7 and 32k miles. After buying it I noticed a shudder in it. I took it in to the dealer and they reprogrammed the ECM per a TSB they found. That did not help. It still shuddered . I then towed my 7500lb 5th wheel...