S15/T15 4WD Jimmy V6-262 4.3L VIN Z (1992)
Torque Converter Clutch: Customer Interest
PROM - Early TCC Engagement
GMC NUMBER:
92-7A-40
GROUP:
7A Automatic Transmission
DATE:
January 1992
CORPORATE
NUMBER:
137107
SUBJECT:
EARLY TRANSMISSION CONVERTER CLUTCH APPLY (INSTALL NEW PROM)
MODELS:
1992 S/T TRUCK WITH 4.3L AND 4L60 AUTOMATIC TRANSMISSION
Some owners of 1992 S/T trucks with 4.3L (LB4) engines and automatic transmissions may comment on early transmission converter clutch (TCC)
engagement, TCC engagement just after the 2-3 upshift, or lack of power. This occurs because the torque converter clutch is applied at low speeds
during some driving conditions.
SERVICE PROCEDURE:
To correct this condition, install a new calibration PROM that raises the TCC apply speed. This calibration will increase the TCC apply speed on a 1992
vehicle to be similar to a 1991 vehicle (see below).
SERVICE PARTS INFORMATION:
Part
PROM
Scanner
Number
Application
Broadcast
I.D.
16175285
Federal
BARL
5551
16175286
California
BARM
5561
Parts are expected to be available on January 27, 1992. In case of limited inventory, parts will be placed on 400 Control to waive VIP surcharges. Only
verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. However, the part will be shipped premium transportation
at dealer's expense and all other order types will be placed on backorder until the 400 control is removed.
WARRANTY INFORMATION:
Labor Operation Number:
T0500
Labor Time:
0.8 Hour