SPECS
On-Highway Trucks
Freightliner | International | Kenworth | Peterbilt | Mack | Sterling | Volvo | Western Star
Vocational Trucks
Freightliner | International | Kenworth | Mack | Peterbilt | Sterling | Volvo | Western Star
Engines
Caterpillar | Cummins | Detroit Diesel | Mack | Volvo
Transmissions
Allison | Arvin/Meritor | Caterpillar | Eaton Fuller | Transmission Technology Corp.| Volvo
Tires
Aeolus | B.F. Goodrich | Bridgestone | Continental | Dunlop | Firestone | General | Goodyear | Hankook | Kelly | Michelin | Toyo 
Trailers
Doonan | East | Fontaine | Great Dane | Liddell | Mac | Transcraft | Utility | Wabash
2006_seats
Bostrom | Comfort Ride | National | Sears | Seats Inc.
Accessories
Kohler | ThermoKing | Willis 
Publisher’s Column 
Our survey of last year’s Overdrive Spec Guide readers shows that more than three-fourths of them rated the information “very helpful.” I believe you’ll feel the same way about this year’s version. 
ARTICLES ON SPEC’ING
 Pushing Air 
As diesel prices stay high, spec’ing aero features is a major consideration for highway trucks.
 Custom Fit 
Careful choices in vocational truck specs pay off in operational ease, flexibilty and longevity.
Green and Mean 
2007 engines offer cleaner-burning technology without giving up muscle.

Auto Alternative 
Automated and automatic transmissions promise lower fuel costs, less driver fatigue and less stress on equipment.
Say no to Squirm and Scrub 
Consider fuel price when spec’ing tires for your tractor and trailer.
The Future In a Box 
Today’s trailers offer lighter but stronger materials unthinkable just a few decades ago.
Sit On It 
You get closer to your seat than to any other part, so choose wisely.
HOW HELPFUL IS THE 2007 OVERDRIVE SPEC GUIDE? E-mail [email protected] with comments and suggestions for next year’s spec guide. Be sure to include your contact information.





