A/T Controls - Pronounced 2-3 Upshift When Cold: Overview

Classification: AT08-003

Reference: ITB08-030

Date: June 13, 2008

2006-2008 M; A/T 2 - 3 UP-SHIFT WHEN COLD

APPLIED VEHICLE:
2006 2008 M (Y50)

APPLIED VINs
2006-2007 vehicles; All VINs

2008 vehicles built before the following VINs:
JNKBY01E(*)8M 500502
JNKBY01F(*)8M 550772
JNKAY01E(*)8M 603532
JNKAY01F(*)8M 652637

APPLIED DATE
Built before December 12, 2007

IF YOU CONFIRM:

The Automatic Transmission 2 - 3 up-shift is more pronounced when:

^ The transmission is cold (first few minutes after a cold start)

and

^ The ambient temperature is below 40°F (4.5°C)

and

^ The shift selector is in "D" (Drive),

ACTIONS:

Step A: Confirm this bulletin applies:

^ Check the Current TCM Part Number (Refer to service procedure).

^ Compare your Current TCM Part Number to Chart A.

If that part number does not match on in chart A, this bulletin does not apply. Go back to ASIST for further diagnostic and repair information.

Step B: Use CONSULT-II to reprogram the TCM. (Refer to service procedure)

IMPORTANT:
The purpose of "ACTIONS" (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire Service Procedure as it contains information that is essential to successfully completing this repair.





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