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Diagnostic Dilemma: The Case of the Missing Code

When doing mobile diagnostic work, no-code stalling complaints are a major part of your agenda. In most cases, the client shop is simply too busy to duplicate the failure or, in some cases, a long test drive will yield nothing in the way of useful...

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Home x-old ACPN Tech Tip: Mitsubishi 2-3 Shift Flare, Slipping

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Some customers may complain of shift flare when shifting from second gear to third gear. This bulletin contains procedures for diagnosing and repairing this condition. New, improved parts are listed in the Parts Information section of this bulletin.

Affected vehicles: 1997-2002 Mirage, 1999-2005 Galant, 2000-’05 Eclipse, 2001-’04 Diamante, 2001-’05 Eclipse Spyder, 2002-’05 Lancer, 2003-’05 Outlander, 2004 Lancer Sportback Wagon and 2004-’05 Endeavor

Procedure:
1. Test-drive the vehicle to confirm that shift flare occurs at the 2-3 shift.

2. Check the ATF level and color. Correct as necessary. Inspect the A/T drain plug for metal debris.

3. Start the engine and warm the ATF to 140-212° F (60-100° C). With constant throttle opening at TPS reading 1.7-1.8V, confirm that the 2-3 upshift occurs between 35 and 40 mph (between 56 and 64 km/h). Continue this driving pattern until the 2-3 shift has occurred five times.

a. If the shift flare is not eliminated after the 2-3 shift has occurred five times, continue with Step 4.

4. Check for DTCs.

a. If any DTC is set, diagnose the DTC as described in the appropriate service manual.
b. If no DTCs are set, perform the pressure tests for the OD clutch and second brake as described in Group 23 of the appropriate service manual. Record the pressures on the repair order. Then continue with Step 5.

5. Open the rear cover. In the seal ring area, inspect the drum, seal rings and rear cover for grooves, excessive damage and poor clearance. See Fig. 1.

Fig. 1

Note: Perform this inspection/repair with the transmission assembly in the ­vehicle.

a. If any grooves, damage or clearance problems are found, replace the following parts with the new, improved parts listed in the Parts Information chart at right.

– Reverse/OD Clutch Assembly (with drum)
– Reverse Retainer
– Seal Rings
– Rear Cover
– Input Shaft Rear Bearing

b. If no grooves, damage or clearance problems are found, follow the diagnosis procedure in Group 23 of the appropriate service manual.

                                PARTS INFORMATION

Part                                             Model                   Part Number

Reverse/OD Clutch Assembly    Mirage 1.5L             2722A020   
                                                   Mirage 1.8L              2722A019
Rear Cover                                  Mirage 1.5L, 1.8L    MD763204

Reverse/OD Clutch Assembly    Diamante                  2722A017
Rear Cover                                 Diamante                  MD763194

Reverse/OD Clutch Assembly    1999-2003 Galant 2.4L    2722A019
                                                    1999-2003 Galant 3.0L    2722A017
Rear Cover                                 1999-2003 Galant 2.4L    MD763204
                                                    1999-2003 Galant 3.0L    MD763194

Reverse/OD Clutch Assembly    2004-’05 Galant 2.4L    2722A019
                                                    2004-’05 Galant 3.8L    2722A023
Rear Cover                                  2004-’05 Galant 2.4L    MD763204
                                                    2004-’05 Galant 3.8L    MD763194

Reverse/OD Clutch Assembly    Eclipse/Eclipse Spyder 2.4L    2722A019
                                                    Eclipse/Eclipse Spyder 3.0L    2722A017
Rear Cover                                  Eclipse/Eclipse Spyder 2.4L    MD763204
                                                    Eclipse/Eclipse Spyder 3.0L    MD763194

Reverse/OD Clutch Assembly    Lancer/Sportback/Outlander    2722A019
Rear Cover                                 Lancer/Sportback/Outlander     MD763204

Reverse/OD Clutch Assembly    Endeavor 3.8L    2722A017
Rear Cover                                 Endeavor 3.8L    MD763194

Seal Rings                           All vehicles listed above    MD760146, MD760147
Input Shaft Rear Bearing    All vehicles listed above    MD752039 or MR446687

Courtesy of Mitchell 1.

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