12 Speed Trucks with Detroit Engines For Sale

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2020 Freightliner Cascadia 113 Sleeper Semi Truck - Detroit 450HP, 12 Speed Dt12 Automatic

Price Drop

$34,000 USD

Unit: 3630, Year: 2020, Make: FREIGHTLINER, Weight: 16,651, Model: CA113SLP, Engine Make: DETROIT DIESEL CORP, Engine: DD13, HP: 450, SN: 471928S0672111, Trans Make: DETROIT DIESEL CORP,...

Condition	Used
Usage	520,624 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Transmission	12 Speed Detroit DT12 Automatic
Stock Number	3630
MLS Number	13422917
Category	Sleeper Semi Trucks
Last Updated	5/13/2025
Location	Central Point, OR, US
Sold By	Combined Transport

(833) 220-___ SHOW
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2018 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$40,999 USD

Great condition and well maintained fleet truck. Ready to make $$$$$. OK Credit, Bad Credit, No Credit, WE WILL GET YOU FINANCED. Please call Adam at ( or Navpreet Singh at ( We also have...

Condition	Used
Usage	587,149 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
MLS Number	12348483
Category	Sleeper Semi Trucks
Last Updated	5/15/2025
Location	Selma, CA, US
Sold By	Selma Truck Sales

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10 0

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Amt

$70,000 USD

N.A.P. New Style Cascadia, Air Release 5th Wheel, Auto Trans, Espar Bunk Heater, Invertor, Jumper Posts, LED Lights, Fridge, Sliding 5th Wheel, Alum Wheels, Well maintained fleet truck

Condition	Used
Usage	499,543 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.41 ratio
Stock Number	3650
MLS Number	13531496
Category	Sleeper Semi Trucks
Last Updated	5/1/2025
Location	GRANGER, IA, US
Sold By	Barr-Nunn Transportation LLC

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10 0

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Amt

$66,000 USD

N.A.P. New Style Cascadia, Air Release 5th Wheel, Auto Trans, Espar Bunk Heater, Invertor, Jumper Posts, LED Lights, Fridge, Sliding 5th Wheel, Alum Wheels, Well maintained fleet truck

Condition	Used
Usage	496,163 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.41 ratio
Stock Number	3564
MLS Number	13512383
Category	Sleeper Semi Trucks
Last Updated	5/1/2025
Location	GRANGER, IA, US
Sold By	Barr-Nunn Transportation LLC

(618) 286-___ SHOW
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16 0

2016 Western Star 5700XE SLP Sleeper Semi Truck

$35,900 USD

This Truck has had a Motor swap.. DD-15 505 HP Tunes 20k in receipts in recent work Cloth Interior- 536610 miles-, DD15-, Detroit-, 14.8 lt-, 455 HP-, Torque 1800-, DT12-, Automated-...

Condition	Used
Usage	535,610 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Single Bunk
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.41 ratio
Stock Number	hg5614
MLS Number	12892052
Category	Sleeper Semi Trucks
Last Updated	5/16/2025
Location	Dupo, IL, US
Sold By	Genesis Equipment Leasing

(833) 801-___ SHOW
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23 0

2018 Freightliner Cascadia 113 Day Cab Truck - Detroit 450HP, 12 Speed Dt12 Amt

Newly Listed

$18,000 USD

nice truck, runs great, clean, fleet maintained, air seat, power windows, power mirrors, tilt/tele, differential lock, dump valve, A/S 5th,,

Condition	Used
Usage	525,171 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.47 ratio
Stock Number	18DET525CASDC
MLS Number	13603663
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Covington, TN, US
Sold By	Don Baskin Truck Sales

(866) 751-___ SHOW
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21 0

2025 Western Star 57X Sleeper Semi Truck - 72" Mid Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Amt

Newly Listed

$192,600 USD

DETROIT ASSURANCE, ACTIVE BRAKE ASSIST 5, WITH ADAPTIVE CRUISE, CONTROL TO 0 MPH AND ADJUSTABLE HEADWAY. DETROIT ACTIVE SIDE GUARD ASSIST. DETROIT LANE DEPARTURE WARNING SYSTEM WITH...

Quantity	2
Condition	New
Usage	586 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Mid Roof Sleeper
Sleeper Size	72"
Suspension	AirLiner
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	100583
MLS Number	13603582
Category	Sleeper Semi Trucks
Last Updated	5/24/2025
Location	Louisville, KY, US
Sold By	Boyd Truck Centers

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2020 Freightliner Cascadia 125 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 450HP, 12 Speed Automatic

Newly Listed

Call for price

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! *** AUTOMATIC!!!, DEF, SLIDING 5TH WHEEL, ENGINE BRAKE, COLLISION MITIGATION Se Habla Español! NO CREDIT? BAD CREDIT? NO PROBLEM!!...

Condition	Used
Usage	578,222 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Automatic
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.25 ratio
Stock Number	H01659
MLS Number	13603563
Category	Sleeper Semi Trucks
Last Updated	5/24/2025
Location	Houston, TX, US
Sold By	Diamond Truck Sales Inc

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21 0

2025 Western Star 57X Day Cab Truck - Detroit 505HP, 12 Speed Dt12 Amt

Newly Listed

$167,700 USD

DETROIT ASSURANCE, ACTIVE BRAKE ASSIST 5, WITH ADAPTIVE CRUISE CONTROL TO 0 MPH AND FIXED HEADWAY. DETROIT SIDE GUARD ASSIST. DETROIT LANE DEPARTURE WARNING SYSTEM WITH 15-MINUTE OFF TIMEOUT...

Quantity	4
Condition	New
Usage	462 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Suspension	AirLiner
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.07 ratio
Stock Number	102446
MLS Number	13603486
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Louisville, KY, US
Sold By	Boyd Truck Centers

(844) 693-___ SHOW
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19 0

2019 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

Newly Listed

$46,500 USD

Ready to hit the road and go to work! First Class 8 Truck Sales is a full-service dealer offering high quality equipment, premium financing options, and an excellent customer experience....

Condition	Used
Usage	605,859 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	351
MLS Number	13603441
Category	Sleeper Semi Trucks
Last Updated	5/24/2025
Location	Belvidere, IL, US
Sold By	First Class 8 Truck Sales

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2018 Freightliner Cascadia 126 Day Cab Truck - Detroit 435HP, 12 Speed Dt12 Amt

Newly Listed

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250,000 Miles, Detroit DD13 Engine, 435 H.P., Engine Brake, DT12 Transmission, (Automatic), 40,000 Lb. Rear Ends, 3.08 Ratio, Air Ride Suspension, Hydraulic Power Steering, Air Conditioned,...

Condition	Used
Usage	250,000 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	435 HP
Engine Model	Detroit DD13
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	JR1523
MLS Number	13603427
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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2018 Freightliner Cascadia 126 Day Cab Truck - Detroit 435HP, 12 Speed Dt12 Amt

Newly Listed

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315,000 Miles, Detroit DD13 Engine, 435 H.P., Engine Brake, DT12 (Automatic), 40,000 Lb. Rear Ends, 3.08 Ratio, Air Ride Suspension, Hydraulic Power Steering, Air Conditioned, Dual Aluminum...

Condition	Used
Usage	315,000 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	435 HP
Engine Model	Detroit DD13
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	JX5061
MLS Number	13603426
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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2019 Freightliner Cascadia 125 Day Cab Truck - Detroit 450HP, 12 Speed Dt12 Amt

Newly Listed

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736,000 Miles, Detroit DD13 Engine, 450 H.P., Engine Brake, DT12 Transmission, (Automatic), 40,000 Lb. Rear Ends, 3.08 Ratio, Air Ride Suspension, Hydraulic Power Steering, Air Conditioned,...

Condition	Used
Usage	736,000 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	KH1266
MLS Number	13603424
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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2019 Freightliner Cascadia 126 Day Cab Truck - Detroit 435HP, 12 Speed Dt12 Amt

Newly Listed

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483,000 Miles, Detroit DD13 Engine, 435 H.P., Engine Brake, DT12 Transmission, (Automatic), 40,000 Lb. Rear Ends, 3.08 Ratio, Air Ride Suspension, Hydraulic Power Steering, Air Conditioned,...

Condition	Used
Usage	483,000 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	435 HP
Engine Model	Detroit DD13
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	KE0825
MLS Number	13603423
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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2019 Freightliner Cascadia 126 Day Cab Truck - Detroit 455HP, 12 Speed Dt12 Amt

Newly Listed

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718,000 Miles, Detroit DD15 Engine, 455 H.P., Engine Brake, DT12 (Automatic), 40,000 Lb. Full Locking Rear Ends, 2.64 Ratio, Air Ride Suspension, Hydraulic Power Steering, Air Conditioned,...

Condition	Used
Usage	718,000 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	455 HP
Engine Model	Detroit DD15
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.64 ratio
Stock Number	KP0646
MLS Number	13603418
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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2020 Freightliner Cascadia 125 Evolution Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 475HP, 12 Speed Dt12 Amt

Newly Listed

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72 Inch Raised Roof Sleeper, Upper Bunk, 517,000 Approximate Miles, ECM Reads 517,000 Miles, Detroit DD15 Engine, 475 H.P., Engine Brake, DT12 Transmission, (Automatic), 40,000 Lb. Rear Ends...

Condition	Used
Usage	517,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	475 HP
Engine Model	Detroit DD15
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	LN3933
MLS Number	13603406
Category	Sleeper Semi Trucks
Last Updated	5/24/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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2018 Freightliner Cascadia 113 Single Axle Day Cab Truck - Detroit 410HP, 12 Speed Dt12 Amt

Newly Listed

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2018 FREIGHTLINER Cascadia113, Detroit DD13 Engine, 410 H.P., Engine Brake, DT12 Transmission, (Automatic), 23,000 Lb. Rear End, Single Axle, 3.07 Ratio, Air Ride Suspension, Hydraulic Power...

Condition	Used
Usage	460,000 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	410 HP
Engine Model	Detroit DD13
Transmission	12 Speed Detroit DT12 Automated
Suspension	Air Ride
Rear Axle	Single Axle
Rear End	3.07 ratio
Stock Number	JS1427
MLS Number	13603394
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Monroe, GA, US
Sold By	AAA Trucks LLC

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51 1

2018 Freightliner Cascadia 125 Sleeper Semi Truck - Mid Roof Sleeper, Detroit 435HP, 12 Speed Dt12 Automatic

Recently Updated

$41,900 USD

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! *** AUTOMATIC!!!, DEF, SLIDING 5TH WHEEL, ENGINE BRAKE, TRAILER BRAKE, COLLISION MITIGATION Se Habla Español! NO CREDIT? BAD CREDIT...

Condition	Used
Usage	457,872 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	435 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Mid Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	H01628-DELIVERY 2 U
MLS Number	13512406
Category	Sleeper Semi Trucks
Last Updated	5/24/2025
Location	Houston, TX, US
Sold By	Diamond Truck Sales Inc

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51 1

2018 Freightliner Cascadia 125 Sleeper Semi Truck - Mid Roof Sleeper, Detroit 435HP, 12 Speed Dt12 Automatic

Recently Updated

$38,900 USD

*** ASK FOR LOW COST DELIVERY AVAILABLE TO ALL 48 STATES!! *** AUTOMATIC!!!, DEF, SLIDING 5TH WHEEL, ENGINE BRAKE, TRAILER BRAKE, COLLISION MITIGATION Se Habla Español! NO CREDIT? BAD CREDIT...

Condition	Used
Usage	547,604 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	435 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Mid Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	H01627-DELIVERY 2 U
MLS Number	13512151
Category	Sleeper Semi Trucks
Last Updated	5/24/2025
Location	Houston, TX, US
Sold By	Diamond Truck Sales Inc

(855) 807-___ SHOW
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32 0

2020 Freightliner Cascadia 126 Day Cab Truck - Detroit 450HP, 12 Speed Dt12 Automatic

Recently Updated

$36,500 USD

CLEAN FLEET MAINTAINED FREIGHTLINER DAY CAB, DETROIT POWER 450HP, AUTOMATIC DT12, JAKES, LOCKERS, COLLISION MITIGATION SYSTEM, HEATED MIRRORS, ALUMINUM RIMS, GREAT RUNNER NO RUST ,READY TO...

Condition	Used
Usage	423,305 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Suspension	AirLiner
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.25 ratio
Stock Number	6972
MLS Number	13512140
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Houston, TX, US
Sold By	Southern Truck Sales Ltd

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48 1

2021 Freightliner Cascadia 126 Day Cab Truck - Detroit 435HP, 12 Speed Dt12 Automatic

Recently Updated

$40,000 USD

2021 FREIGHTLINER CASCADIA 126 DAYCAB, DD13 ENGINE,DT12 AUTOMATIC TRANSMISSION, SLIDING FIFTH WHEEL, COLD AIR, RADIO, 178" WB, 11R22.5, GOOD RUBBER LEFT, SOUTHERN TRUCK, NO RUST!! ,...

Condition	Used
Usage	395,532 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	435 HP
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
MLS Number	13504254
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Jackson, TN, US
Sold By	Snider Equipment

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37 2

2021 Freightliner Cascadia 126 Day Cab Truck - Detroit 435HP, 12 Speed Automatic

Recently Updated

$42,500 USD

2021 FREIGHTLINER CASCADIA 126 MODEL, DD13 ENGINE 435 HP, DT-12 AUTOMATIC TRANSMISSION, 381,699 MILEAGE, 178" WB, 3.08 WB, 11R22.5, SLIDING FIFTH WHEEL, CLEAN INTERIOR, COLD A/C, NO ENGINE...

Condition	Used
Usage	381,699 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	435 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
MLS Number	13495917
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Jackson, TN, US
Sold By	Snider Equipment

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47 2

2018 Freightliner Cascadia 126 Day Cab Truck - Detroit 435HP, 12 Speed Dt12 Automatic

Recently Updated

$35,000 USD

2018 FREIGHTLINER CASCADIA 126 DAYCAB, 488K*** MILEAGE, DETROIT DT12 AUTOMATIC TRANSMISSION, 12K FRONT, 40K REARS, JAKE BRAKE, SLIDING FIFTH, SHINY ALUMINUM WHEELS, 85 RUBBER REMAINING!! A/C...

Condition	Used
Usage	488,518 Miles
Duty Class	Heavy Duty Day Cab Truck
Horse Power	435 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
MLS Number	13464120
Category	Day Cab Semi Trucks
Last Updated	5/24/2025
Location	Jackson, TN, US
Sold By	Snider Equipment