Tacoma PreRunner L4-2.7L (2TR-FE) (2005)
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PROM - Programmable Read Only Memory: Customer Interest
Engine, A/T Controls - Torque Converter Lock-Up Shudder
T-SB-0096-09
March 20, 2009
Torque Converter Flex Lockup Shudder
Service Category
Drivetrain
Section
Automatic Transmission/Transaxle
Market
USA
Applicability
The information contained in this TSB supersedes TSB No. T-SB-0048-09.
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The following sections have been updated to include information for 2005 - 2007 model year Tacoma vehicles:
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Applicability
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Warranty Information
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Parts Information
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Calibration Information
TSB No. T-SB-0048-09 is Obsolete and any printed versions should be discarded. Be sure to review the entire content of this service bulletin before
proceeding.
Introduction
Some customers with 4 cylinder (2TR-FE) and A340 (4-speed) automatic transmission equipped Tacoma vehicles may experience an intermittent
shudder or vibration. This condition lasts for approximately one second and occurs when lightly accelerating after an upshift into 3rd or 4th gear with the
torque converter assembly in Flex Lockup. This vibration is commonly described as feeling like driving over "rumble strips" or on a "washboard" road.
The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been revised to prevent the learning of an incorrect value
during certain driving conditions. Use the following repair procedure to address customer concerns.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VIN shown.
