Electra V6-231 3.8L VIN C SFI (1988)
Sun Gear: Technical Service Bulletins
A/T - New Final Drive Assembly/Output Shaft/Sun Gear
Bulletin:
88-7440-9
Date:
Aug., '88
Ref. No.: 88-203-7440
Corp. Ref. No. 877132
SUBJECT:
NEW FINAL DRIVE ASSEMBLY, OUTPUT SHAFT, AND FINAL DRIVE SUN GEAR SHAFT
MODELS AFFECTED:
1988 CENTURYS, REGALS, LESABRES, ELECTRAS/PARK AVENUES AND RIVIERAS EQUIPPED WITH A
THM 440-T4 (ME9) TRANSAXLE
FIGURE 2
BULLETIN COVERS
A new final drive assembly (6/9), output shaft (565) and final drive sun gear shaft (669) for some 1988 A, C, E, H and W Cars equipped with a THM
440-T4 transaxle. The new final drive assembly (679) has larger differential side gears (688) and larger differential pinion gears (686) (refer to Figure 2).
To accommodate the larger gears, the output shaft (565) was lengthened by .73 mm (.029"). The final drive sun gear shaft (669) was also changed by
adding two additional lube holes for increased lubrication to the final drive.
