NUMBER: 21-002-07 REV. B
DATE: July 17, 2007
Flash: Torque Converter Shudder / Shift Quality Improvements / DTC P0732
This bulletin involves reprogramming the Powertrain Control Module (PCM) with new software and replacing the torque converter as required.
The vehicle operator may experience one or more of the following symptoms:
1. Transmission Shudder – 42RLE All, 41TE CS/JS, 62TE CS/JS
a. This condition can only occur after the vehicle has been driven and the torque convertor is past the break in period. Torque Converter break in can be confirmed with the StarSCAN®.
b. If experienced, the shudder may occur when the transmission temperature is between 38° C and 54° C (100° F and 130° F) during steady state driving with the torque convertor in partial lock (EMCC) operation. The shudder feels like the vehicle
is being driven over rumble strips.
2. Torque Converter Pull In Bump – 41TE JS, 62TE CS/JS
a. This condition can occur due to abrupt torque converter clutch engagement during EMCC initialization.
3. DTC P0732 – Gear Ratio Error in 2nd Gear – 62TE CS
a. The MIL may or may not be lit (2 trip fault).
b. Limp In will occur when this fault is set.
c. This is an intermittent condition and cannot be duplicated. If the fault can be duplicated, other conditions exist and further investigation will be required.
4. Shift Quality Improvements – 62TE CS
a. Rapid Decel Coastdown Stumble.
b. Low Speed 3-2 Kickdown Harshness.
c. 4-5 and/or 5-6 upshift flare bump.