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January 14, 2014 Service bulletin

This information was created to inform the technician that the 2-3 upshift and the 3-2 downshift clunk is...

Chevrolet technical service bulletin 01-07-30-042H for 2006-2011, 2014 Chevrolet Silverado 1500, 2005-2014 Chevrolet Tahoe and 2014 GMC Sierra 1500 and others.

Bulletin number
01-07-30-042H
Component
Power train: clutch assembly
Summary
This information was created to inform the technician that the 2-3 upshift and the 3-2 downshift clunk is caused by the releasing of the 2-4 band and application of the 3-4 clutch assembly during an upshift. Also during a 3-2 downshift, the releasing of the 3-4 clutch during the application of the 2-4 band, can cause torque reversal down the output shaft creating a clunk. This is a normal condition.

Owners of these vehicles have filed 2,407 complaints in the transmission category.

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