Freightliner · Class 8 on-highway tractor
Freightliner Cascadia 126Detroit DD15 Gen 5, 14.8 L (DD13 Gen 5 12.8 L also offered)
Built 2018-2026
Engine Detroit DD15 Gen 5, 14.8 L (DD13 Gen 5 12.8 L also offered)
Sources checked 121 of 137 (88%)
What it is
The most common long-haul tractor in North America. The 126 is the longer-cab version with more room behind the seat.
Pick a folder
Fluids & Fill Amounts9 entriesBolt Tightness52 entriesWhen to Service13 entriesWarning Lights & Codes30 entriesHow to Fix It79 entries
The truck itself
Configuration
Inline 6, 906 cu in / 14.8 L
Compression ratio
21.0:1 (Gen 5)
Bore x stroke
5.47 in x 6.42 in (139 x 163 mm)
Dry weight
2,718 lb (1,233 kg)
Horsepower
425-475 hp (Gen 5); up to 505 hp earlier
Peak torque
1,550-1,750 lb-ft
Governed speed
1,800 rpm
Transmission
Detroit DT12 12-speed automated manual
Front axle
Detroit 12k or 13.3k
Rear axle
Detroit 40k tandem (23k single optional)
Weight class
Class 8 - 40,000 lb tandem rear, 12,000-13,300 lb steer
Before you order anything
Options change the numbers
The Cascadia 126 is the 126-inch BBC long-haul tractor. Engine and axle ratings change per order, so confirm from the door jamb label.