Transmission Case - 2pc. SFI - GM TH400 Offroad

The Transmission Case - 2-Piece SFI - GM TH400 Off-Road is a heavy-duty aluminum transmission housing engineered for extreme off-road and high-performance applications. Built to SFI 4.1 safety standards, this two-piece case design for the Super Hydra 400 transmission delivers the structural integrity and heat dissipation required in demanding trail, rock-crawling, and recovery operations where stock transmission housings fail under sustained torque loads.

Constructed from aluminum, this transmission case reduces overall vehicle weight while maintaining critical rigidity at the transmission mount points—a significant advantage in off-road platforms where unsprung mass impacts suspension articulation and response. The natural finish protects the aluminum surface while allowing visual inspection of internal transmission condition through the clear design. At 36.55 lbs, the complete two-piece assembly integrates with GM TH400 architectures common in vehicle platforms used for expedition recovery, overlanding, and high-stress off-road competition where transmission longevity directly impacts mission success.

This case is purpose-built for operators and builders who upgrade aging TH400 transmissions in rock-crawlers, expedition vehicles, and recovery platforms. The SFI 4.1 certification ensures compliance with safety standards recognized in sanctioned off-road competition and serious expedition work. The two-piece modular design simplifies internal service and rebuilds, reducing downtime in field conditions. Ideal for users who demand maximum transmission durability when operating in extreme terrain, prolonged low-speed power delivery, or repeated shock-load cycling that stock housings cannot withstand.