A/T Controls - Poor Upshift/Downshift Quality

DTB

Date: October 16, 2008
Order No.: S-B-27.00/107a
Supersedes: S-B-27.00/107a P-B-27.00/107 dated May 16, 2008
Group: 27







SUBJECT: Model 164.122/822
Model 211.022
Model 251.122
Uncomfortable Shift Quality in Partial Load Ranges / Affecting Upshifts 1-2, 2-3 and Downshifts 3-2, 2-1

If you receive customer reports in the above model vehicle of uncomfortable shift quality in partial-load ranges, affecting upshifts 1-2, 2-3 and downshifts 3-2, 2-1, the cause is a variation in the engine torque signals at the engine/transmission interface. This condition can be resolved by flashing the engine control module with the update found in the 08/08 SDS release. After flashing the motor control module, proceed with flashing the transmission control module if newer SW is available.

NOTE:

- The engine/transmission control module must be SCN coded after the flashing process and the affected shifts may require re-adaptation.

- The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on October 16, 2008. Please refer to Netstar -> Star TekInfo -> Star Time for the most current labor time allowance.

In Case of Warranty

Operation: Short test, perform (54-1011)
Control unit - software (after short test), install (54-0991)
Control unit - .... code (after short test), perform (54-0992)
Adaptation, perform (27-1047)