A/T - Revised Accumulator and Retaining Clip

Number: 93-18-7A
Section: 7A
Date: OCT. 1992
Corporate Bulletin No.: 277132
ASE No.: A2

Subject:
REVISED ACCUMULATOR BUSHING AND RETAINING CLIP/CONVERTER CLUTCH REGULATOR LINE-UP

Model and Year:
1993 LUMINA 1993 LUMINA APV

TRANSMISSION APPLICATIONS:
1993 HYDRA-MATIC 4T60-E (RPO M13)

TRANSMISSION MODELS:
All

SUBJECT:
^ Revised Accumulator Bushing and Retaining Clip
^ Revised Converter Clutch Regulator Line-up (General Information)

VEHICLE APPLICATIONS:
W-Car, U-VAN

BULLETIN COVERS:

A redesigned accumulator bushing and accumulator bushing retainer clip has been released for all 1993 HYDRAMATIC 4T60-E (RPO Mi 3) transaxles. The redesign has improved the "holding" capacity of the accumulator bushing by increasing the bushing retainer window to accommodate a more robust retainer clip (380).





Also, a new design has been released for 1993 on the 4T60-E transaxle "Converter Clutch Regulator" line-up (Figure 2). The new design has eliminated the valve bore plug (329) and spring clip retainer (314), and replaced them with a converter clutch regulator bushing (384). The bushing is secured in place with converter clutch retainer (383), which was previously retainer (337).





DATE OF PRODUCTION CHANGE:

The revised accumulator bushings and accumulator bushing retainers will be implemented into production at the start of the 1993 Model Year (SVP 93). When servicing prior 4T60-E transaxle models (1991 and 1992), it is essential that the old (prior) accumulator bushings and accumulator bushing retainers be used (THE OLD AND NEW ACCUMULATOR BUSHINGS AND RETAINERS ARE NOT INTERCHANGEABLE).

SERVICE PART INFORMATION:

PART DESCRIPTION ILLUSTRATION
(1991 AND 1992 MODEL YEARS) NUMBER

BUSHING, 1-2 ACCUMULATOR VALVE (PRIMARY) 342
BUSHING, 2-3 ACCUMULATOR VALVE 345
BUSHING, 1 -2 ACCUMULATOR (SECONDARY) 349
BUSHING, 3-4 ACCUMULATOR VALVE 352
RETAINER, ACCUMULATOR BUSHING ASM. 337
RETAINER, SPRING CLIP 328
PLUG, VALVE BORE. 329
VALVE BODY MACHINED 301

NEW PART DESCRIPTION ILLUSTRATION
(1993 MODEL YEAR) NUMBER

BUSHING, 1-2 ACCUMULATOR VALVE (PRIMARY) 342
BUSHING, 2-3 ACCUMULATOR VALVE 345
BUSHING, 1-2 ACCUMULATOR (SECONDARY) 349
BUSHING, 3-4 ACCUMULATOR VALVE 352
RETAINER, CONVERTER CLUTCH REGULATOR 383
BUSHING, CONVERTER CLUTCH REGULATOR 384
VALVE BODY MACHINED 301

Parts are currently available through GMSPO.