It is common for E4OD/4R100 transmissions to have soft 1-2 or 2-3 shifts. Severe wear of the Line Pressure Modulator Sleeve allows EPC oil to leak past valve.
96948-01K will recalibrate shift to Heavy Duty HighPerformance Feel.
MTS can also help you to customize shift feel to your preference!!! Give us a call 800-731-4510