Delta 88 V6-3800 3.8L (1988)
Shift Modulator: All Technical Service Bulletins
A/T - Harsh Gear Engagement
SUBJECT
HARSH ENGAGEMENT CONDITIONS:
NUMBER: 88-T-25
I.
PARK OR NEUTRAL TO DRIVE OR REVERSE
II. REVERSE TO DRIVE - VEHICLES WITH 2.8L
CORP. REF. NO.: 877108
ENGINES ONLY
MODELS/YEARS
1987-1988 VEHICLES EQUIPPED WITH THM
DATE: January 1988
440-T4 (ME9) TRANSAXLE
SECTION:
7A
VEHICLE APPLICATIONS
Cutlass Ciera (A Carline), Delta 88 (H Carline), Ninety-Eight (C Carline), Toronado (E Carline), Cutlass Supreme (W Carline)
BULLETIN COVERS:
Harsh Engagement conditions and specfic 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) 3346 CM HG (13-18 in hg) required
-
Stuck modulator valve
-
Missing No. 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 tranaxles were built using a new 1-2 servo cushion spring, reverse servo cushion spring and
reverse servo return spring.