Service bulletin LI27.60-P-079083

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

NHTSA's summary

Complaint • Harsh 1-2, 2-3, and/or 3-4 shift • Jerky shifting • Jolting when accelerating from stop Cause Insufficient software application causing elevated K81/K27/B05 fill time adaptations and elevated torque adaptations for concerning shift. Remedy Long Term A software resolution is currently in development to remedy this harsh shift concern. Short Term Please continue with the following to alleviate the concern until the software resolution is released. 1. Check transmission oil level and correct, if necessary (transmission oil temperature > 60 °C) 2. Perform Xentry Valve Flushing procedure at least 3x 3. Perform a standstill adaptation, then read out new EEPROM data If the concern is still present: 4. Perform driving adaptation(s) while adhering to the below parameters until the shift quality improves. Note: There is no menu in Xentry for this procedure. We recommend displaying the torque in the instrument cluster. If all below parameters are met at the time the shift, a driving adaptation will automatically occur. Harsh 1-2 Perform a driving adaptation of 4-5 (adapts K81 for the 1-2 shift) Harsh 2-3 Perform a driving adaptation of 2-3 (adapts B05 directly) Harsh 3-4 Perform a driving adaptation of 3-4 (adapts K27 directly) - Level track (no incline/decline) - Slippery drive program - Display the torque in the instrument cluster: The torque must be between 100 and 250 Nm (about 184 ft lbs), preferably closer to the maximum torque - Constant engine torque - Engine speed below 2500 rpm - Do not shift via paddle If the concern still persists after over 30 miles of adaptations, please submit a TIPS case to the Powertrain inbox and ensure the following is included: - Initial Quick Test w/ Freeze Frame Data - VGS Control Unit Log - Initial EEPROM (before any adaptations or Xentry procedures were performed) - EEPROM data after all driving adaptations

The document

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Components

Transmission and driveline

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