Avoiding Torque Converter Or Crankshaft Damage While Diagnosing Noise Concerns Do Not Separate The Torque Converter From The Flex Plate

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NHTSA ID Number: 10220319

Manufacturer Communication Number: 22-NA-181

Summary

This diagnostic tip advises the tech not to separate the flexplate from the torque convertor or damage my occur if the engine is started while diagnosing for noise from the engine or transmission.

Condition

Some customers may comment on a noise coming from underneath the vehicle equipped with an automatic transmission.

Cause

Technicians may find that the noise is coming from the bell housing area.

Correction

Important: Do Not separate the torque converter from the flex plate.
The purpose of this information is to advise the dealer technician of the following:

It is not recommended to remove the flex plate to torque converter bolts, push the torque converter back towards the transmission and start the engine to determine if the noise is coming from the engine or the transmission.

Damage may occur to the pilot on the front of the torque converter or the pilot hole in the end of the crankshaft or both if the engine is running with the flex plate to torque converter bolts removed.

It is recommended to use chassis ears to isolate the component or assembly that is the loudest source of the noise.

2069 Affected Products

Vehicles

1 Associated Document

Manufacturer Communications

Bulletin No.: 22-NA-181
Date: September, 2022

https://www.nhtsa.gov/recalls?nhtsaId=10220319

MC-10220319-0001.pdf 489.615KB

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NHTSA ID Number: 10224273

Manufacturer Communication Number: PIP5640A

Summary

This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the torque converter of the crankshaft on vehicles equipped with an automatic transmission.

1 Associated Document

Manufacturer Communications

Bulletin No.: PIP5640A
Published date: 09/1/2022

https://www.nhtsa.gov/recalls?nhtsaId=10224273

MC-10224273-9999.pdf 95.53KB

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NHTSA ID Number: 10193450

Manufacturer Communication Number: PIP5640A

Summary

1 Associated Document

Manufacturer Communications

Bulletin No.: PIP5640A
Published date: 04/12/2021

https://www.nhtsa.gov/recalls?nhtsaId=10193450

MC-10193450-9999.pdf 94.175KB

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NHTSA ID Number: 10160987

Manufacturer Communication Number: PIP5640

Summary

1 Associated Document

Manufacturer Communications

Bulletin No.: PIP5640
Published date: 05/7/2019

https://www.nhtsa.gov/recalls?nhtsaId=10160987

MC-10160987-9999.pdf 93.131KB

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SEOCONTENT-START

Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 22-NA-181 Date: September, 2022 INFORMATION Subject: Diagnostic Tip on Avoiding Torque Converter or Crankshaft Damage While Diagnosing Noise Concerns This bulletin replaces PIP5640A. Please discard PIP5640A. Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Buick GM Passenger Cars and Trucks 2000 2023 All All All All Cadillac Chevrolet GMC Involved Region or Country North America Condition Some customers may comment on a noise coming from underneath the vehicle equipped with an automatic transmission. Cause Technicians may find that the noise is coming from the bell housing area. Correction Important: Do Not separate the torque converter from the flex plate. The purpose of this information is to advise the dealer technician of the following: It is not recommended to remove the flex plate to torque converter bolts, push the torque converter back towards the transmission and start the engine to determine if the noise is coming from the engine or the transmission. Damage may occur to the pilot on the front of the torque converter or the pilot hole in the end of the crankshaft or both if the engine is running with the flex plate to torque converter bolts removed. It is recommended to use chassis ears to isolate the component or assembly that is the loudest source of the noise. Version 1 Modified Released September 01, 2022 GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

**************************************************************************************************************

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Avoiding Torque Converter Or Crankshaft Damage While Diagnosing Noise Concerns Do Not Separate The Torque Converter From the Flex Plate – GM Passenger Cars and Trucks

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MAKE	MODEL	YEAR

BUICK	ALLURE	2006-2009
BUICK	CASCADA	2016-2019
BUICK	CENTURY	2000-2005
BUICK	ENCLAVE	2008-2023
BUICK	ENCORE	2013-2022
BUICK	ENCORE GX	2020-2022
BUICK	ENVISION	2016-2022
BUICK	LACROSSE	2005-2020
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BUICK	RAINIER	2003-2007
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CADILLAC	DEVILLE	2000-2005
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CADILLAC	SEVILLE	2000-2004