Transmission Specialties TH400 SFI Two-Piece Aluminum Transmission Cases 4072

Transmission Specialties TH400 SFI two-piece aluminum transmission cases are SFI certified for Turbo 400 transmissions. Developed to eliminate all weak points found in the original GM transmission case, the case is cast from 356-T6 aluminum and precision machined to rigorous specifications. A combination of strength and quality castings and machining make this SFI-approved transmission case stronger and more ductile than OEM castings.