Freightliner · Class 8 severe-duty / vocational tractor
Freightliner 122SDDetroit DD13 or DD16 (Cummins X15 optional)
Built 2013-2026
Engine Detroit DD13 or DD16 (Cummins X15 optional)
Sources checked 116 of 133 (87%)
What it is
Freightliner's heavy vocational and severe-duty conventional, used for heavy haul, construction and oilfield work. It shares the Detroit DD engine family with the Cascadia.
Pick a folder
Fluids & Fill Amounts7 entriesBolt Tightness52 entriesWhen to Service11 entriesWarning Lights & Codes30 entriesHow to Fix It79 entries
The truck itself
Configuration
Inline 6, 12.8 L (DD13) or 15.6 L (DD16)
Horsepower
350-600 hp
Peak torque
1,250-2,050 lb-ft
BBC
122 in
Application
Severe duty, heavy haul, construction, oilfield
Transmission
Eaton Fuller manual or automated; Allison automatic available
Front axle
Meritor / Detroit 12k-20k
Rear axle
Meritor 40k-58k tandem
Weight class
Class 8 severe duty - up to 58,000 lb tandem rear
Before you order anything
Options change the numbers
The 122SD is built for heavier work than the Cascadia. Axle and frame ratings are much higher, so do not assume Cascadia torque values for suspension hardware.