SBF To TH400 Ultra-Bell 157 Tooth

The SBF To TH400 Ultra-Bell 157 Tooth from J-W Performance is a precision-engineered bellhousing adapter designed for builders who demand seamless integration between small-block Ford (SBF) engines and TH400 automatic transmissions. This adapter is essential for engine swap projects where you're mating a compact, high-revving Ford V8 to the legendary three-speed TH400—one of the most durable and street-proven automatic gearboxes ever built.

The 157-tooth configuration refers to the flexplate ring gear tooth count, which ensures proper starter engagement and smooth power transfer from the Ford engine to the TH400's input shaft. J-W Performance's ultra-bell design features a precisely machined aluminum construction that maintains tight tolerances while minimizing weight—critical for applications where every pound matters. The adapter's geometry is optimized to reduce tunnel intrusion and clearance issues common in engine swap applications.

Serious enthusiasts and professional fabricators choose this adapter for its compatibility with factory SBF engine blocks, providing the correct bolt pattern and pilot diameter for TH400 transmission installation. Whether you're building a hot rod, restomod, or high-performance street machine, this ultra-bell solution eliminates fitment headaches and delivers the mechanical marriage your drivetrain requires.