Last month, GM Authority reported that GM was in the process of launching a redesigned valve body for the ten-speed automatic transmissions used in its full-size pickup trucks and SUVs. Now, we’re ...

In Part 1 of our LT4 engine build (click here), we inspected, machined, and assembled our LT1 turned LT4 short-block at Trans Am Racing under the watchful eye of Mark Jeffrey. Mark has a long-standing ...