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Drivetrain - 2001 - 2010 Discuss front and rear axle, transfer case, brakes, etc. Transmission questions belong in the appropriate transmission forum below. First through fourth generation...

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Old 09-30-2019, 03:12 PM   #1 (permalink)
DCFDbigAL21
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Rumble/bouncing during shift

2004 Chevy Silverado 2500HD with a Duramax 6.6 and Allison transmission. I have a bouncing feeling in the rear, kinda like a feeling of running over a rumble strip when the transmission changes gears. One shop already threw a transmission at it with no results. That was a costly guess! ... Anyway, I am looking for suggestions and frustrated.

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Old 10-05-2019, 09:35 AM   #2 (permalink)
306LBZ
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Did they change the torque converter at that same time? Stock trans? Were the u joints checked/replaced first? One piece drive shaft or 2? Any mods done to the trucks suspension or stock? Have you researched the cab mount issue and compared yours?

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