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.
For best results, use in conjunction with Sonnax line pressure modulator valve 96948-01K for heavy-duty/high performance applications.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.