Caravan AWD V6-201 3.3L (1991)
Clutch: All Technical Service Bulletins
A/T - A604 1-2 Gear Upshift Shudder
SUBJECT:
1-2 Upshift Shudder 1989-91 Vehicles Equipped With A-604 Transmission
NO.:
21-22-90
GROUP:
TRANSMISSION
DATE:
Nov. 19, 1990
MODELS:
1989-91
(AA)
SPIRIT/ACCLAIM/LEBARON
(AC)
DYNASTY/NEW YORKER/LANDAU/SALON
(AG)
DAYTONA
(AJ)
LEBARON COUPE/LEBARON CONVERTIBLE
(AS)
CARAVAN/GRAND CARAVAN/CARAVAN C/V
VOYAGER/GRAND VOYAGER/TOWN & COUNTRY
(AY)
IMPERIAL/NEW YORKER FIFTH AVENUE
SYMPTOM/CONDITION:
Some vehicles equipped with the A-604 transmission may exhibit an occasional shudder during the 1-2 upshift. This condition is most noticeable when
the vehicle is being operated on a smooth blacktop road after the transmission has reached normal operating temperature.
DIAGNOSIS:
Check transmission fluid level and condition. Connect the DRB II. Record fault codes. Perform the diagnostic test as outlined in the appropriate
Powertrain Diagnostic Manual. Be sure to complete the shift lever test, clutch test and record clutch volumes (CVI).
Select the RPM display on the DRB II. Road test the vehicle a sufficient distance to ensure the transmission has warmed up.
NOTE:
THE FOLLOWING STEP SHOUID BE PERFORMED ON A SMOOTH BLACKTOP ROAD.
Initiate a 1-2 upshift from a throttle angle (TSP) of 10" through wide open throttle in steps of 50.
If shudder was experienced during the 1-2 upshift, perform the repair procedure.
If no shudder was experienced, but fluid condition, fault codes, shift lever test or clutch test indicate a problem, correct as required.
PARTS REQUIRED:
REPAIR PROCEDURE:
This repair involves removing the transaxle, and reconditioning the 2-4 clutch.
Use the appropriate Service Manual as a guide in performing the following steps.
1.
Remove the transaxle assembly.
2.
Remove the oil pan and valve body.
3.
Measure and record the input shaft end play.
4.
Remove input speed sensor.
5.
Remove the oil pump and gasket.
NOTE:
ON 1991 VEHICLES BE SURE TO REMOVE THE INTERNAL OIL COOLER BYPASS VALVE.
