A/T - Uncomfortable 2-1 Coastdown Downshift

Date: November 7, 2006
Order No.: T-B-27.60/68e
Supersedes: T-B-27.60/68d dated Oct. 27, 2006
Group: 27

Revision History

Revision Date Purpose
e 11/7/06 Process Updated - Refer to 2nd Note on Page 1
d 10/27/06 Part Number Updated
c 4/10/06 Warranty Information Updated
b 3/13/06 Warranty Information Updated
a 1/26/06 Procedure Updated
- 1/20/06 Initial issue

SUBJECT:
Model 164.175/186

Model 251.165/175

Uncomfortable 2-1 Downshift When Braking or Coasting

If you receive customer reports in the above model vehicles of an uncomfortable 2-1 downshift just before the vehicle comes to a complete stop, perform the steps below to resolve.

1. Reproduce the condition and verify the affected shift member using Star Diagnosis.

2. Reprogram the transmission control unit by performing initial startup with the current Star Diagnosis version (all of the corresponding software add-ones must be installed in Star Diagnosis).

NOTE:
In order to install the latest SW versions the vehicle must be equipped with valve body A220 270 13 06 or A220 270 21 06. If the transmission is equipped with part number A220 270 14 06, please replace the valve body first and then proceed with the reprogramming. For reference please refer to WIS document AR27.19-P-0200W.

NOTE:
If valve body replacement is required, refer to the process outlined in DTB P-B-27.00/38d located on Star TekInfo.





Parts Information