Cutlass Supreme FWD V6-204 3.4L DOHC (1991)
Clutch Switch: All Technical Service Bulletins
M/T - Clutch Bump Sensation When Decelerating
NUMBER:
91-T-230
CORP.REF.NO: 136526
DATE:
January 1992
SECTION:
6E3,7
SUBJECT:
CLUTCH "BUMP" WITH 3.4L (VIN CODE X)
AND MANUAL TRANSMISSION
ADD SWITCH AND REPLACE MEMCAL
MODELS/YEARS:
1991 CUTLASS SUPREME WITH 3.4L (VIN X)
ENGINE AND MANUAL TRANSAXLE
CONDITION: The customer may comment that the manual transmission has a "bump" sensation when decelerating. The engine may decelerate too
quickly if the driver lets up on the accelerator before depressing the clutch, causing a momentary "bump" sensation just before the clutch
is fully released.
CAUSE:
There is no "clutch anticipate" signal to the ECM to allow for less abrupt fuel cut-off to the injectors during shifting.
CORRECTION:
Parts List:
(Parts are currently available from GMSPO).
Part No.
Name
12126540
Kit, Clutch Anticipate, contains:
(1) 4-way connector with wires
(1) Wire with terminals on both ends
(3) Crimp connectors
16166146
MEMCAL
10180569
Switch, C/C Release and Clutch Anticipate
Parts needed if vehicle does not have cruise control:
10075405
Retaining clip
10094202
Actuator Tab
11503747
Nut
10042901
Bolt
1.
Disconnect negative battery cable.
2.
Remove the left hand IP sound insulator panel.
3.
Add "clutch anticipate" switch as follows:
A.
If the vehicle has cruise control, remove the existing clutch switch and discard it. Remove the clip and reinstall it in the opposite direction.
Cut the connector from the two cruise control switch wires (brown and brown/white wires), as close to the connector body as possible, and
discard the connector.