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Tugger shift kit for Ford 4R100 transmissions (1999–2003). This internal shift kit doubles low‑clutch holding pressure in first gear for heavy downhill use, firms shift feel, and improves converter feed and capacity. Installation requires transmission removal and an experienced technician. The kit is marketed as a preventive upgrade during transmission or cooler installs and for trucks needing stronger shift control under load.
BD Diesel Tugger Shift Kit - 1999-2003 Ford 4R100
