Calais L4-138 2.3L VIN D FI (1990)
Clutch: All Technical Service Bulletins
A/T - New Roller Clutch
NUMBER:
91-T-58
CORP.REF.NO: 177103
DATE:
February 1991
SECTION:
7A, 3T40
SUBJECT:
NEW (NEW DEPARTURE HYATT) ROLLER CLUTCH
MODELS/YEARS: ALL 1991 AND PRIOR MODEL YEAR OLDSMOBILES
EQUIPPED WITH HYDRA-MATIC 3T40 TRANSAXLES (RPO - MD9)
Figure 1
Figure 2
Hydra-Matic has released a new NDH (New Departure Hyatt) Roller Clutch (662) for all HYDRAMATIC 3T40 transaxles, for increased Lo Roller
clutch durability. This roller clutch has a new spring and roller holding cage which is plastic and black in color. The springs located inside the roller
clutch have been rotated to a position of 90 degrees. See Figures 1 and 2.
DATE OF PRODUCTION CHANGE:
This new roller clutch went into production October 23, 1990 (Julian Date 296) for all Willow Run built models. Windsor built models will be equipped
with this new roller clutch at a future date.
SERVICE PARTS INFORMATION:
This new roller clutch may be used in all prior model year HYDRA-MATIC 3T40 transaxles. Whenever ordering this new NDH roller clutch, refer to
the following part number:
