Century V6-173 2.8L VIN W FI (1987)
Valve Body: All Technical Service Bulletins
A/T - Harsh Park or Neutral/Drive/Reverse Engagement
Bulletin 88-7440-2
Date Dec. '87
Ref. No. 88-056-7440
Corp. Ref. No. 877108
SUBJECT:
HARSH ENGAGEMENT CONDITIONS:
I.
PARK OR NEUTRAL TO DRIVE OR REVERSE
II.
REVERSE TO DRIVE - VEHICLES WITH 2.8L ENGINES ONLY
1987-1988 THM 440-T4 (ME9)
MODELS AFFECTED: ALL 1987-88 CENTURYS, LESABRES, ELECTRAS, RIVIERAS AND REGALS EQUIPPED WITH THM 440-T4 (ME9)
TRANSAXLES
BULLETIN COVERS
Harsh engagement conditions and specific service information for 1987 and 1988 cars equipped with a THM 440-T4 transaxle. Other items which cause
harsh engagement conditions are:
-
vacuum leaks (low vacuum supply to the vacuum modulator) 33-46 Cm Hg (13-18 In Hg) required
-
stuck modulator valve
-
missing #9 checkball
Figure 1 - THM 440-T4 Transaxle Identification Information
DATE OF PRODUCTION CHANGE (Figure 1)
November 24, 1987 (Julian Date 328), all THM 440-T4 transaxles were built using a new 1-2 servo cushion spring, reverse servo cushion spring and
reverse servo return spring.
