A/T - Poor Downshifts/Shift Flare
Group: TRANSAXLENumber: 97-40-027-1
Date: DECEMBER, 1997
Model: 1997 TIBURON
1996-97 ACCENT (SOHC) & ELANTRA
Subject
AUTOMATIC TRANSAXLE 2-3 SHIFT FLARE REDUCTION AND DOWNSHIFT QUALITY IMPROVEMENT
This TSB supersedes TSB # 97-40-027 to include additional models
DESCRIPTION:
Modified transaxle control modules (TCM) are available for the following shift quality improvements:
^ Reduction of shift flare during the upshift from 2nd to 3rd gear (engine speed increases slightly during the 2-3 shift). This condition occurs at light throttle angles (15-20% TPS) when the automatic transaxle fluid is cold (below 60°, 140°F).
^ Improvement of shift quality when a 4-2 downshift is commanded at 75-100% TPS when driving at a steady speed of 35-60 mph.
The modified TCMs were installed in production beginning with the dates shown below. If you encounter a vehicle with the above conditions which was produced prior to the effective vehicle production date shown below, test drive the vehicle to confirm the conditions. If no diagnostic codes or other driveability symptoms are found, replace the TCM.
PARTS INFORMATION: