Speedmaster GM Turbo 400 TH400 to Powerglide Tailhousing Adapter PCE598.1004

The Speedmaster PCE598.1004 is a transmission tailhousing adapter designed to convert a GM Turbo 400 (TH400) automatic transmission tailhousing to a Powerglide case configuration. This adapter enables builders and engine shops to mate later-model TH400 components with classic Powerglide transmission cases, solving fitment challenges in engine swaps and custom builds where tailhousing geometry must be reconciled.

Built to support engine bay modifications, this adapter allows technicians to preserve existing Powerglide case installations while upgrading to TH400 tailhousing internals, or vice versa. It is commonly used in street rods, classic car restorations, and custom engine swaps where transmission compatibility is a constraint. The MPN PCE598.1004 is the industry standard reference for this specific conversion, making sourcing and installation straightforward for experienced builders.

Key Features & Benefits

• TH400 to Powerglide Conversion: Adapter enables direct conversion between GM Turbo 400 and Powerglide transmission tailhousing configurations.
• Custom Build Compatible: Designed for engine swaps, restorations, and custom transmission installations where tailhousing fitment must be adapted.
• Industry-Standard Reference: Speedmaster PCE598.1004 MPN ensures compatibility and is recognized across the automotive builder community.
• Transmission Adapter: Bridges the gap between two different GM automatic transmission case designs for flexible powertrain assembly.

Specifications

Ideal Applications

• Engine swaps and custom drivetrain builds requiring tailhousing case conversion
• Classic car and street rod restorations with mixed transmission component sourcing
• Custom transmission installations where Powerglide cases must be mated to TH400 internals
• Vintage hot rod projects requiring transmission adapter solutions