Kojem Adjustable Transmission Crossmember for 1964–1987 Chevy/GMC C10 C20 2WD Trucks — Steel, Exhaust Clearance, Bolt-On Kit

Kojem's adjustable transmission crossmember is a heavy-duty, bolt-on replacement engineered to fit 1964–1987 Chevy and GMC C10/C20 2WD trucks, Blazers, and Suburbans while allowing ride height changes and exhaust clearance.

Whether you’re installing an aftermarket transmission, lowering or lifting the truck, or fitting long-tube headers, this adjustable crossmember provides a durable, serviceable mount that keeps the transmission securely aligned with the driveshaft. Constructed from thick steel and supplied with hardware, the unit is designed for use with the factory transmission mount holes so you can install it without cutting or drilling the frame when the fitment is correct.

How does this crossmember handle different ride heights and transmission angles?

The Kojem adjustable crossmember offers vertical adjustability so you can raise or lower the transmission relative to the frame while working to preserve the factory transmission angle. Correct angle is essential for driveline alignment and vibration reduction. Use the multiple mounting positions to dial in the needed height for lowered suspensions or lifted setups.

• Multiple bolt-on positions for incremental height adjustments
• Designed to maintain factory transmission angle when installed properly
• Works with both lowered and raised chassis configurations
• Includes bolts, washers, and locking nuts for secure attachment

Will this clear long-tube headers and aftermarket exhaust systems?

This crossmember is profiled to provide additional clearance for long-tube headers and larger exhaust pipes, reducing the risk of contact or heat transfer to the mount. The steel construction adds strength in areas that commonly interfere with aftermarket exhaust routing. Still confirm clearance with your specific header design before installation.

• Engineered profile for exhaust and header clearance
• Sturdy steel build resists deformation from heat and vibration
• Test-fit recommended with your chosen header set before final installation
• Mounting positions maintain safe distance from exhaust components

What materials, hardware, and fitment details should I expect?

The crossmember is fabricated from high-quality steel and finished to withstand road conditions and workshop environments. Kojem ships the crossmember with all required fasteners—bolts, washers, and locking nuts—so you receive a complete mounting kit. This product is specifically compatible with 1964–1987 Chevy/GMC C10 and C20 2WD trucks, Blazers, and Suburbans; verify your chassis year and model before purchase.

• High-grade steel construction for long-term durability
• Complete hardware included for a bolt-on installation
• Fits 1964–1987 Chevy/GMC C10, C20 2WD, Blazer, and Suburban models
• No drilling required when used with factory mounting holes

How difficult is installation and what tools are required?

Installation is a straightforward bolt-on process when your frame and factory transmission mount holes are intact. No welding or drilling is required in standard applications, but a professional install is recommended if you’re unsure about driveline angles or custom exhaust clearance. Basic hand tools and a jack or lift are typically sufficient for most installs.

• Bolt-on design uses existing transmission mounting holes
• Basic tools: wrenches, sockets, jack or lift; no special fabrication normally needed
• Professional installation recommended for complex swap or custom setups
• Installation hardware provided with product

Who is this for? The Kojem adjustable transmission crossmember is aimed at classic Chevy/GMC truck owners, restoration enthusiasts, and modifiers who need a strong, adjustable transmission mount for 1964–1987 C10/C20 2WD chassis, Blazers, or Suburbans. It’s ideal if you’re fitting aftermarket transmissions, modifying ride height, or installing long-tube headers and want a reliable, bolt-on solution that includes mounting hardware. Always verify vehicle year and model compatibility and consider professional fitting to ensure correct transmission angle and driveline alignment.