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RecallGazette

Vehicle problems, recalls & safety intelligence

Cadillac CTS 2007–2015technical service bulletin

Bulletin PIP-4554-M · NHTSA communication 10078871 · issued May 4, 2016

Technical service bulletin
communication type
Power Train
component
2007–2015
model years
21
vehicle entries

Official summary

This preliminary information communication provides the technician with the steps on repairing a clunk noise after shifting from reverse to drive or drive to reverse and then accelerating. The concern is only with rear wheel drive 6l45 or 6l50 automatic transmissions with regular production option code mya or myb apply. Apply thread locker to the transmission output shaft flange splines and install a new front propeller shaft flange nut. Apply thread locker to the new propeller shaft flange nut if it does not contain a pre-applied adhesive patch.

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.