Ford E4OD and 4R100 accumulator springs can break, weaken or collapse, causing long, soft shifts, particularly in towing and heavy-duty applications. Recalibrate shift feel with Sonnax performance rated accumulator spring kit 36948-18K.

• Best in heavy-duty and towing applications
• Gives quicker and firmer 1-2, 2-3 and 3-4 shifts
• Recalibrates shift feel