A/T - 2nd - 3rd Gear Shift Flare/Shudder

Group
TRANSAXLE

Number
03-40-015

Date
AUGUST, 2003

Model
ALL

Subject
AUTOMATIC TRANSAXLE 2-3 SHIFT FLARE OR SHIFT SHUDDER

DESCRIPTION:

If you are servicing a vehicle with 2-3 shift flare (engine speed increases during the 2-3 shift) or shift shudder, follow the procedure shown below:





1. CHECK ATF LEVEL:

^ Attach a Hi-Scan Pro and select "Automatic Transaxle" and "Current Data" menus and "Oil Temperature Sensor".

^ Drive the vehicle until the ATF temperature is at normal operating temperature (158-212°F or 70-100°C).

^ Place the shift lever in "Neutral" and check the ATF level on the dipstick. Add SPIII ATF to bring the level to the top of the "FULL" mark.





2. CHECK FOR APPLICABLE TCM REPROGRAMS AND MODIFIED ATM.





3. CHECK FOR MODIFIED TCMS.

4. CHECK TRANSAXLE OIL TEMPERATURE SENSOR:





^ Attach the Hi-Scan Pro to the DLC and select "Hyundai Vehicle Diagnosis" and "Automatic Transaxle" menus. Check "Temperature Sensor" when the ATF is cold and hot. If the oil temperature sensor does not indicate as shown, replace the sensor:

5. DISCONNECT THE BATTERY AND PERFORM ADAPTIVE LEARNING:





^ Drive the vehicle until the ATF temperature is above the temperature shown.

^ Accelerate the vehicle through several 1-2-3-4 upshifts at small throttle openings (approximately 25-30% TPS) until shift flare or shift shudder no longer occurs.

6. TEST DRIVE THE VEHICLE.

^ If the above procedures have been completed and shift flare or shift shudder continues to occur, replace the transaxle.