Mustang 5.0 Transmission Crossmember BR3Z-6A023-B, 2011-2025

This is a replacement for Ford BR3Z-6A023-B, the transmission support crossmember that carries the rear of the transmission on 2011 through 2025 Mustangs with the 5.0L V8. The transmission mount bolts to the center of the member and the outer ends bolt to the body.

The factory crossmember gets bent when the car is lifted or jacked on it, cracked on lowered cars that drag, and rotted on cars that see salted roads. A damaged member lets the tail of the transmission sit low or off center. That shows up as a clunk on shifts and on and off the throttle, driveline vibration from a changed pinion angle, and on manual cars a shifter that sits crooked in the boot.

To swap it, support the transmission with a jack under the pan or case, remove the mount-to-crossmember nuts and the crossmember-to-body bolts, then install the new member and torque everything to factory spec. Look at the rubber transmission mount while it is out. If it is torn or sagging, replace it now. Confirm the part number on your old crossmember matches BR3Z-6A023-B before ordering.