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2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900

clunking noise during auto-shifting

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Old Sep 12, 2012 | 6:50 PM
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fastback4's Avatar
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From: Kentucky
Default clunking noise during auto-shifting

Today my chevy dealership informed me my clunking sound during the 1-2 and 2-3 shift points is a normal acceptable problem according to GM. My truck is a 07 Silerado 5.3
They say the overlap of the clutches releasing in the auto transmission causes this clunking sound and they say mine is quiet compared to others like my truck. I said to them 'bull crap", people turn and stare at me in shopping malls when this truck shifts from 1-2 at low rpm's after they hear the Klunk sound. I believe it's my ring and pinion play ( I have .250 play at the pinion, or it could be a worn shaft on the spider gears.....
Oh yes, my drive shaft is aluminum, no yoke, and i have check my universal joints.
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