A/T - A604 Intermittent Engagement or Limp In Mode

90chrysler04

Models

1990 AA, AC, AG, AJ, AS, & AY BODIES


Subject

Intermittent Transmission Engagement, Harsh Shifting, Or LimpIn Mode On Vehicles Equipped With A-604 Transmission


Index

TRANSMISSION


Date


February 26, 1990

No.


21-07-90

P-537 (C21-04-0)
BODY CODE LEGEND

AA - ACCLAIM/SPIRIT/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 1990 vehicles equipped with the A604 Ultradrive Transaxle built PRIOR TO JANUARY 1, 1990, TRANSAXLE DATE CODE K xxx 0384 xxxx may experience an intermittent loss of the signal from the PRNDL switch. This intermittent condition can cause delayed transmission engagement, harsh shift into reverse, or transmission to default to the limp-in mode, accompanied with the following fault codes: 22 "2-4 PRESSURE SWITCH ERROR" - 37 "SOLENOID SWITCH VALVE" - 39 "TURBINE OR OUTPUT CIRCUIT ERROR".

The intermittent nature of this condition allows the DRB II shift lever status to pass the test. As a result, the solenoid assembly, valve body assembly or speed sensors may have been replaced without correcting the condition.

DIAGNOSIS

Check the transaxle build date, if it is PRIOR TO TRANSAXLE DATE CODE K xxx 0384 xxxx, and no dab of white paint are found on the PRNDL and Neutral Safety switches, perform the following repair procedure.

PARTS REQUIRED

1 - PRNDL Switch PN 5234393
1 - Neutral Safety Switch PN 5234319
1 - Washer - PRNDL PN 2408143
1 - Washer - N/S Switch PN 5234023



NOTE: THE ABOVE PARTS HAVE BEEN UPDATED. THE UPDATED PARTS CAN BE IDENTIFIED BY THE BIACK PLASTIC CARRIER WHICH EXTENDS INTO THE TRANSMISSION, AS SHOWN IN THE ILLUSTRATION BELOW.
REPAIR PROCEDURE

This repair involves replacement of the PRNDL switch and the neutral safety switch.

1. Disconnect the battery negative cable.
2. Replace the PRNDL and neutral safety switches as outlined in the appropriate service manual.
3. Place a dab of white touch-up paint on both switches to identify they have been replaced.
4. Connect the battery negative cable.
5. Connect the DRB II, clear any exiting transmission fault codes.
6. Road test the vehicle a sufficient distance to ensure the transaxle is warm. With the shift lever in the 0D position, perform several 0 to 50 MPH accelerations, being sure the transmission shifts through all gears.
7. Using the DRB II after the road test, recheck transmission for any fault codes. if any fault codes are present, use the appropriate diagnostic procedures to repair.


POLICY: Reimbursable within the provisions of the warranty.


TIME ALLOWANCE:
Labor Operation No. 08-80-56-90 0.5 Hrs.


FAILURE CODE: 61 - Intermittent Operation