Is the tractor towing the semi-trailer or is the semi-trailer pushing the tractor? The AWD-Bedford TM tractor unit is powered by a Caterpillar 3406B truck diesel. From 1988 to 1992, it was the final reincarnation of the 1974 – 1986 Bedford TM-series, the ol’ truck maker’s flagship back then.
Like this fine example, a Dutch registered 1979 TM 3800 (as in 38 tons gross combination weight), powered by a Detroit Diesel 8V-71. Screaming, not purring.
(Some more AWD-Bedford MTM 55 information and pictures on TrucksPlanet.com)