Caprice Wagon RWD V8-350 5.7L (1992)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
A/T - Chuggle
Number: 93-258-6E
Section: 6E
Date: JULY 1993
Corporate Bulletin No.: 376507
ASE No.: A1
Subject:
CHUGGLE (NEW CALIBRATION PROMS)
Model and Year:
1992-93 CAPRICE WITH 5.7L ENGINE (RPO L05-VIN 7)
AND AUTOMATIC TRANSMISSION
CONDITION:
Some owners with vehicles listed below, equipped with 5.7L V8 engines (L05, VIN 7), may comment about a "chuggle" condition.
This bulletin addresses the following vehicle/condition problems ONLY:
BODY
YEARS
CONDITION
Wagon
1992-93
Chuggle with base axle only
RPO GU2, 2.73 ratio
CAUSE:
Insufficient dampening of the torque converter and PROM calibration.
CORRECTION:
New calibration PROMs have been released to address the above vehicle/condition problems.
The following PROMs are NOT RECOMMENDED for vehicles with OPTIONAL AXLE RATIOS or TRAILER TOWING PACKAGES.
Vehicles produced from mid-June 1993 through the end of the model year are expected to have this PROM change. Check PROM Scan ID.
PLEASE NOTE:
The vehicles (in chart) produced before December 16, 1991 (Julian Date 350) may have Hydramatic 4L60 Model 2DDM Transmissions. Model
2DDM Transmissions may contain torque converters with insufficient dampening.
Vehicles with Model 2DDM Transmission - Check dealer records to see if the torque converter has already been replaced with P/N 8650935 (Tagged
B/C: DGAF). It is not necessary to replace those torque converters with P/N 8650935.
Transmissions with torque converters with P/N 8656959 (Tagged B/C: DG5F) need to have the torque converter replaced with P/N 8650935.
Model 2BRM transmissions (produced after December 16, 1991) have the new torque converter.
Parts are currently available from GMSPO.
WARRANTY INFORMATION:
