CFMi - 4L60E Transmission Crossmember for LS Swapped C10 Squarebody Chevy Trucks

CFM Industries C10 4L60E Transmission Crossmember

Upgrade your Squarebody drivetrain with this heavy-duty fabricated transmission crossmember designed specifically for LS-swapped 1973–1987 Chevy and GMC C10 2WD trucks running a 4L60E transmission. Built for strength, adjustability, and improved clearance, this crossmember helps simplify drivetrain positioning while retaining critical frame support.

Unlike factory crossmembers, this design includes upper frame supports to help maintain chassis strength in an area that experiences significant frame load and twist.

Features and Benefits

• Designed for LS swaps using 4L60E transmissions
• Heavy-duty fabricated steel construction
• Adjustable mounting positions for drivetrain flexibility
• Slotted transmission mount holes for fine adjustment
• Retains upper frame support structure for added chassis strength
• Allows up to 3-inch exhaust routing beneath crossmember
• Keeps drivetrain tucked above bottom frame line for improved clearance
• Can also be adapted for use with other transmissions

Fitment

Designed for 1973–1987 Chevy and GMC C10 2WD Squarebody trucks.

Available Options

• Optional CFM Industries LS swap motor mounts
• Optional polyurethane transmission mount

Important Fitment Notes

• Exhaust modifications may be required
• Crossmember placement may interfere with factory emergency brake cables depending on setup
• Additional fitment adjustments may vary depending on engine and transmission positioning

Installation

• Designed to replace the factory transmission crossmember
• Uses factory frame mounting locations with multiple adjustment positions
• Professional installation recommended for drivetrain swaps
• Transmission positioning should be verified before final tightening

Finish

• Ships in raw steel
• Requires paint or powder coating before installation

Why This Upgrade Works

This crossmember is designed to solve several common LS swap issues at once by improving drivetrain adjustability, maintaining frame support, and maximizing exhaust clearance. It provides a cleaner and stronger foundation for serious Squarebody drivetrain builds.