Small Block Ford Tremec T-5 5-Speed Trans Driveline Kit

Built around the TREMEC T-5, this driveline kit covers the 289, 302, and 351W small-block Ford family and doesn't need the torque capacity of the bigger TKX package. It's rated for 300 lb-ft, runs a deep 0.63 overdrive in fifth, and the aluminum-case transmission itself weighs about 75 lbs dry, which keeps the whole swap lighter and easier to support than a heavier-duty unit.

What comes with it

The box includes the T-5 transmission, a steel Quick Time bellhousing, an 11-inch RAM clutch kit, a hydraulic release bearing, and a lightweight steel flywheel offered in either 28 or 50 ounce external balance to match your engine. ARP hardware secures the flywheel and pressure plate. Gearing runs from 2.95:1 in first down through 1.00:1 in fourth to that 0.63:1 top gear, with a 2.76:1 reverse. Ten splines on a 1.125-inch shaft handle the input side; 28 splines on a 1.375-inch shaft handle the output.

Plan for these extras

You'll still need a hydraulic clutch master cylinder, a correct transmission crossmember, a 28-spline slip yoke, and a transmission mount, plus Dexron III/Mercon ATF to fill it. The output uses a slip yoke rather than a fixed flange, and the speedometer drive is mechanical. Materials-and-workmanship coverage runs for one year on this driveline kit.

Is this a good fit for a daily-driven restomod? The lighter overdrive-equipped T-5 suits street use and highway cruising better than a heavier race-oriented box. Which flywheel balance do I need? Match it to your specific engine's external balance spec before ordering.