To address the tunnel clearance issues, Buck fabricated a custom crossmember to lower the trans mount closer to the ground. Likewise, since the T5 is about 1 inch longer than a C4, the mount was moved rearward. The ends of the crossmember started out as a piece of 2.5-inch square steel tubing that was then split in half. After some experimentation, it turned out that 1/8-inch-thick tubing slid over the factory crossmember mounting location perfectly. Buck then fabbed the middle section of the crossmember from 2x2-inch tubing and connected them to the ends of the crossmember with 1x2-inch steel. Interestingly, the factory C4 rubber mount bolts right up to the T5 tailshaft housing.