8L90E Transmission Mount Adapter for LS and LT Engine Swaps
When swapping an LS or LT engine into a custom chassis and pairing it with a Gen V automatic, fitting an 8L90E or 10L90E transmission can stall progress due to mismatched tailshaft housings and factory mounts. The 8L90E Transmission Mount Adapter solves this by adapting both 8L90E and 10L90E housings to a standard transmission mount, ensuring compatibility with MuscleRods crossmembers when used as part of a transmission crossmember system. Constructed from aluminum for durability under load, this kit includes the transmission mount adapter (part number 8790E) and all mounting screws, providing a complete solution for secure, correct tailshaft integration without guesswork.
Precision Engineered Adapter for 8L90E and 10L90E Transmissions
The 8L90E Transmission Mount Adapter seamlessly integrates GM's 8L90E and 10L90E transmissions with GM LS and LT engine platforms. This adapter plate secures to the tailshaft housing and converts the factory output section into a layout that aligns with traditional transmission mount bosses. By matching both bolt patterns and centerline locations, it guarantees correct placement without shims or trial fits. Accurate alignment reduces stress on the driveshaft and universal joints while maintaining the designed torque path. Consistent torque transfer extends component life and preserves smooth power delivery under load.
Seamless Compatibility with MuscleRods Crossmembers
Designed exclusively for use with MuscleRods transmission crossmembers, this adapter assures proper engine placement and exact driveline angles. The interface positions the transmission centerline for known safe pinion angles and eliminates the vibration issues that result from improper alignment. Installers simply mount the adapter to the case and bolt the assembly to the crossmember with no trimming or welding. This targeted fitment simplifies the assembly sequence, cuts labor hours and prevents common misalignment errors, ensuring the driveline remains square with the chassis for stable handling.
Robust Construction for Demanding Applications
Manufactured from premium grade aluminum, the adapter offers superior strength to weight ratio and resists deformation under extreme torsion. Precision CNC machining delivers tight tolerances on all mounting faces, preventing play and ensuring repeatable performance. In high torque applications, the material choice helps dissipate heat and withstand repeated load cycles without cracking or warping. Every unit receives a protective finish that safeguards against corrosion in wet or dusty environments, making this adapter suitable for street use, competition builds and towing configurations where durability is paramount.
Streamlined Installation and Performance Benefits
No welding, cutting or fabrication is required for installation. The adapter replaces stock transmission brackets and aligns directly with common frame rails. A comprehensive hardware kit and step by step instructions guide the installer through each phase, reducing setup time and minimizing errors. Proper orientation of the transmission not only simplifies shifting but also improves driveshaft balance by maintaining ideal phase angles. Builders of all skill levels can achieve a professional result, unlocking consistent power transfer, precise engine location and reliable operation for any LS or LT V8 application.
Built from robust aluminum and designed for use with standard crossmember systems, this adapter ensures reliable integration of LS and LT engines with your 8L90E or 10L90E transmission.