Ford Performance has added two new aftermarket Tremec five-speed manual transmissions to its parts catalog, further offering options for custom car builders. The TKX is the latest five-speed transmission from Tremec, and was built specifically for the aftermarket. Weighing just 99 pounds, the TKX is physically smaller than the TKO, and offers a number of differences based on customer feedback. The Tremec TKX transmission is offered with two different overdrive gear ratios to better suit the build, 0.68:1 and 0.81:1. The wider ratio will offer higher top speed or lower cruising RPM, while the s…