Grand Prix V6-191 3.1L (1989)
Torque Converter Clutch: All Technical Service Bulletins
Engine Controls - Revised Chart C8, TCC Operation
Bulletin Number:
89-6-55
Reference Number:
976502
Publish Date:
6/89
Subject:
SERVICE MANUAL UPDATE SECTION 6E3-C8-10 DRIVEABILITY EMISSIONS
Models
TCC OPERATION
Affected:
1989 GRAND PRIX 3.1L (VIN T), 440T4
On page 6E3-C8-10 of the 1989 Grand Prix Service Manual is the following statement:
"The TCC will engage on a warm engine under given road load in 2nd, 3rd, and 4th gears."
It should read as follows:
"The TCC will engage on a warm engine under given road load in 3rd and 4th gear."
Calibration for the 3.1L engine with a 440-T4/Hydramatic 4T60 transaxle does not engage the TCC in second gear.
Please make this correction in your 1989 Grand Prix Service Manual.
