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On/Off lockup kit for Ford 4R100 transmissions (1999–2003). This kit replaces the OEM PWM lockup valve with a short, crisp On/Off valve assembly to improve converter life and lockup responsiveness. Drop‑in valves require no special tooling or machining, but installation of internal parts requires transmission removal and an experienced technician. Kit includes valve assembly and related hardware.
BD Diesel On/Off Lockup Kit - 1999-2003 Ford 4R100
