Heavy Duty Trucking has teamed up with Today's Trucking, an award-winning Canadian magazine published by Newcom, to bring you the Ultimate Test Drive Video series. We're kicking it off with a special two-part "twin sticks" edition. Equipment Editor Jim Park visits Mack's test track in Allentown, Pa., to experience first-hand 50 years of advancements in transmission technology.

Park, a truck driver and owner-operator for 20 years before becoming a trucking journalist, has won nine Jesse H. Neal honors for business journalism and has been covering trucking since 1998.

Click here to watch the video.

Park also wrote about the experience driving the twin-stick 1957 B61 Mack in his On the Road blog.