STS AWD V6-3.6L (2007)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
A/T Controls - Chuggle/Surge/Shudder/Exhaust Moan
Bulletin No.: 06-07-30-030A
Date: September 05, 2007
TECHNICAL
Subject:
5L40-E/5L50-E Transmission Torque Converter Clutch (TCC) Surge, Shudder, Exhaust Moan, Chuggle at Low Speed and Light Load (Reprogram
TCM)
Models:
2004-2007 Cadillac CTS
2005-2007 SRX, STS
with V6 Engine (VIN Codes 7, N, T - RPOs LY7, LA3, LP1)
2004-2006 SRX
2005-2006 Cadillac STS
with V8 Engine (VIN Code A - RPO LH2)
Supercede:
This bulletin is being revised to add V6 engine applications. Please discard Corporate Bulletin Number 06-07-30-030 (Section 07 -
Transaxle/Transmission)
Condition
Some customers may comment on a shudder, surge or chuggle on light throttle under light load just after torque converter clutch (TCC) engagement.
Others may comment on an engine exhaust moan in the 1200 RPM range between 65-73 km/h (40-45 mph). This occurs with the transmission at normal
operating temperature and commanding the TCC off with the scan tool will eliminate the concern.
Correction
New transmission calibrations have been released to correct this condition in both V6 and V8 applications.
Reprogram the TCM using SPS. This new service calibration is available on TIS2WEB.
After reprogramming the TCM, if the condition persists and mileage is greater than 40,234 km (25,000 mi), replace the torque converter, flush the
transmission oil cooler, and replace the transmission fluid.
If the condition still persists, contact the Technical Assistance Center (TAC).
Warranty Information
For vehicles repaired under warranty, use the table.
