Used 12 Speed Tandem Axle Sleeper Semi Trucks For Sale

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Tri State Truck Center - Springfield, MO

2023 Freightliner Cascadia 126 Sleeper Semi Truck - Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Newly Listed

$79,995 USD

2023 FREIGHTLINER CASCADIA 126, DETROIT DD15, GEN 5 / 505 HP, DETROIT DT12 AUTOMATIC TRANSMISSION, 398,457 MILES, 240 GALLONS FUEL TANKS, UNDER FACTORY WARRANTY, FLEET MAINTAINED...

Condition	Used
Usage	398,457 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
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	6634
MLS Number	14172583
Category	Sleeper Semi Trucks
Last Updated	2/28/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$66,500 USD

Used 2022 Freightliner Cascadia 126 Sleeper Semi Truck with 72" integral sleeper, 505HP DD15AT diesel engine, 12-speed Detroit automatic transmission, tandem rear axle, air ride suspension,...

Condition	Used
Usage	449,788 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.23 ratio
Stock Number	457245
MLS Number	13854164
Category	Sleeper Semi Trucks
Last Updated	2/28/2026
Location	Columbia, TN, US
Sold By	Penske Used Trucks

(833) 300-___ SHOW
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2024 Peterbilt 579 Sleeper Semi Truck - 70" Raised Roof Sleeper, Paccar 510HP, 12 Speed Amt

Newly Listed

Contact for price

DISC BRAKE, LOCK AU 1ER ESSIEU, FRIGO, ESPAR,

Condition	Used
Usage	2,059 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	510 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	70"
Suspension	Paccar
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.42 ratio
Stock Number	C-37491
MLS Number	14171232
Category	Sleeper Semi Trucks
Last Updated	2/28/2026
Location	Montreal/ Ile-aux-noix/Toronto/NY, QC, Canada
Sold By	Gamache Truck Center

2021 Freightliner Cascadia 126 Sleeper Semi Truck - 60" Integral Sleeper, 505HP, 12 Speed Automatic

Newly Listed

$46,000 USD

Used 2021 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 620,107 miles, 505 HP DD15AT diesel engine, 12-speed Detroit automatic transmission, 60" integral sleeper, tandem rear axle,...

Condition	Used
Usage	620,107 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	60"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.25 ratio
Stock Number	368231
MLS Number	14170427
Category	Sleeper Semi Trucks
Last Updated	3/1/2026
Location	Davenport, IA, US
Sold By	Penske Used Trucks

(833) 801-___ SHOW
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2020 Western Star 5700XE Sleeper Semi Truck - 82" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Amt

Price Drop $22,000 USD

SUPER NICE RIDE/ BIG HORSEPOWER! VERY GOOD TRUCK/ WELL MAINTAINED, RUNS GREAT, CLEAN, AIR SEATS, AIR BRAKES, DIAMOND INTERIOR, DUMP VALVE, DIFFERENTIAL LOCK, SLIDING 5TH WHEEL, POWER WINDOWS...

Condition	Used
Usage	815,202 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	Raised Roof Sleeper
Sleeper Size	82"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	20DET815WS
MLS Number	13644958
Category	Sleeper Semi Trucks
Last Updated	2/28/2026
Location	Covington, TN, US
Sold By	Don Baskin Truck Sales

(833) 490-___ SHOW
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2025 Freightliner Cascadia Sleeper Semi Truck, 89,000 MILES!!! 505HP , Next Gen , Financing Available , Trades Welcome , Call Today !!!!!@

Newly Listed

$152,995 USD

Seize this incredible opportunity on a nearly new 2025 Freightliner Cascadia sleeper that's primed for profitable long-haul runs—with only 89,294 miles on the clock, it's in exceptional...

Warranty

Condition	Used
Usage	89,254 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Mid Roof Sleeper
Sleeper Size	72"
Suspension	4 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	UWF1523
MLS Number	14167357
Category	Sleeper Semi Trucks
Last Updated	2/27/2026
Location	Springfield, MO, US
Sold By	Tri State Truck Center - Springfield, MO

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Newly Listed

$78,250 USD

Used 2022 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 402,495 miles, 505 HP DD15AT diesel engine, 12-speed automatic transmission by Detroit, 72" integral sleeper, tandem rear...

Condition	Used
Usage	402,495 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	432240
MLS Number	14167085
Category	Sleeper Semi Trucks
Last Updated	2/28/2026
Location	Tuscaloosa, AL, US
Sold By	Penske Used Trucks

(844) 321-___ SHOW
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2024 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Recently Updated

$97,900 USD

Balance of Detroit Diesel 5 Year/500K Mile Major Components (PARTS ONLY) Warranty and 5 Year/750K Mile Basic Transmission Warranty In Service: 01/30/2024,

Condition	Used
Usage	9,879 Hours
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	4 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	1723
MLS Number	14147951
Category	Sleeper Semi Trucks
Last Updated	2/27/2026
Location	Fontana, CA, US
Sold By	Yerevan Truck & Equipment Sales

(844) 321-___ SHOW
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2024 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Raised Roof Sleeper, Detroit 455HP, 12 Speed Dt12 Automatic

Recently Updated

$99,900 USD

Balance of Detroit Diesel 2y/999999 ml BASIC ENGINE Warranty and 5 Year/750K Mile Basic Transmission Warranty, In Service: 06/30/2024,

Condition	Used
Usage	8,374 Hours
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	4 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	1720
MLS Number	14144654
Category	Sleeper Semi Trucks
Last Updated	2/28/2026
Location	Fontana, CA, US
Sold By	Yerevan Truck & Equipment Sales

(844) 687-___ SHOW
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2024 Kenworth T680 Sleeper Semi Truck - 52" Mid Roof Sleeper, Paccar 510HP, 12 Speed Endurant Automatic

Recently Updated

$87,950 USD

2024 Kenworth T680 – Low Miles, Long Warranty, Ready to Roll. This 2024 Kenworth T680 is a standout late-model sleeper with only 120,000 verified miles and exceptional factory warranty...

Condition	Used
Usage	120,165 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	510 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Mid Roof Sleeper
Sleeper Size	52"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.25 ratio
Stock Number	CO11033
MLS Number	14053873
Category	Sleeper Semi Trucks
Last Updated	3/3/2026
Location	Kansas City, MO, US
Sold By	Michelle Sells Trucks

2024 Kenworth T680 Sleeper Semi Truck - 52" Mid Roof Sleeper, Paccar 510HP, 12 Speed Endurant Automatic

Recently Updated

$87,950 USD

2024 Kenworth T680 – Low Miles, Long Warranty, Ready to Roll. This 2024 Kenworth T680 is a standout late-model sleeper with only 120,000 verified miles and exceptional factory warranty...

Condition	Used
Usage	120,165 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	510 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Mid Roof Sleeper
Sleeper Size	52"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.25 ratio
Stock Number	CO11033
MLS Number	14053871
Category	Sleeper Semi Trucks
Last Updated	2/28/2026
Location	Commerce City, CO, US
Sold By	Michelle Sells Trucks

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2021 Freightliner Cascadia 126 Sleeper Semi Truck - Mid Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

Recently Updated

$64,995 USD

DETROIT DD15 / AUTOMATIC TRANSMISSION / APU / PTO / FLEET MAINTAINED / FINANCING AVAILABLE 2021 FREIGHTLINER CASCADIA 126, MID-ROOF XT SLEEPER, 428,111 MILES, DETORIT DD15 ENGINE, DETROIT...

Condition	Used
Usage	428,111 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	Mid Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	5778
MLS Number	13688194
Category	Sleeper Semi Trucks
Last Updated	2/27/2026
Location	Fontana, CA, US
Sold By	Fontana Truck Outlet

2022 Peterbilt 579 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 500HP, 12 Speed Amt

Newly Listed

$52,950 USD

Built for fuel efficient, long haul, money making optimized operation and driver comfort. Powered by a strong 500HP Cummins X15 and paired with an automated transmission, this truck...

Condition	Used
Usage	529,173 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Automated
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Stock Number	CO11173
MLS Number	14162042
Category	Sleeper Semi Trucks
Last Updated	2/27/2026
Location	Kansas City, MO, US
Sold By	Michelle Sells Trucks

2022 Peterbilt 579 Sleeper Semi Truck - Raised Roof Sleeper, Cummins 500HP, 12 Speed Amt

Newly Listed

$52,950 USD

Built for fuel efficient, long haul, money making optimized operation and driver comfort. Powered by a strong 500HP Cummins X15 and paired with an automated transmission, this truck...

Condition	Used
Usage	529,173 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Automated
Sleeper Type	Raised Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Stock Number	CO11173
MLS Number	14161898
Category	Sleeper Semi Trucks
Last Updated	2/27/2026
Location	Commerce City, CO, US
Sold By	Michelle Sells Trucks

2022 International LT625 Sleeper Semi Truck - 73" Integral Sleeper, Cummins 500HP, 12 Speed Automatic

Recently Updated

$64,000 USD

Used 2022 International LT625 Sleeper Semi Truck for sale, 250,560 miles, Cummins X15 diesel engine with 500 HP, 12-speed Eaton automatic transmission, 73" integral sleeper, tandem rear axle...

Condition	Used
Usage	250,560 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	73"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	405656
MLS Number	13868370
Category	Sleeper Semi Trucks
Last Updated	2/26/2026
Location	Monmouth Junction, NJ, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Recently Updated

$61,500 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 458,570 miles, 505 HP DD15AT diesel engine, 12-speed automatic Detroit transmission, 72" integral sleeper, tandem rear axle,...

Condition	Used
Usage	458,571 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.23 ratio
Stock Number	352006
MLS Number	13800796
Category	Sleeper Semi Trucks
Last Updated	2/27/2026
Location	Clackamas, OR, US
Sold By	Penske Used Trucks

2022 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 505HP, 12 Speed Automatic

Newly Listed

$54,750 USD

Used 2022 Freightliner Cascadia 126 Sleeper Semi Truck, 574,381 miles, 505HP DD15AT diesel engine, 72" integral sleeper, 12-speed automatic Detroit transmission, tandem rear axle, air ride...

Condition	Used
Usage	574,381 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15AT
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	417271
MLS Number	14159636
Category	Sleeper Semi Trucks
Last Updated	2/26/2026
Location	East Chicago, IN, US
Sold By	Penske Used Trucks

2021 Kenworth W990 Sleeper Semi Truck - 76" Mid Roof Sleeper, Cummins 500HP, 12 Speed Endurant Automatic

Price Drop $79,950 USD

2021 Kenworth W990 sleeper truck offers premium features and a strong spec for owner-operators and fleets alike. Highlighted upgrades include chicken lights, a full gauge package, in-dash...

Condition	Used
Usage	483,049 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Mid Roof Sleeper
Sleeper Size	76"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.87 ratio
Stock Number	CO11128
MLS Number	14120119
Category	Sleeper Semi Trucks
Last Updated	2/27/2026
Location	Kansas City, MO, US
Sold By	Michelle Sells Trucks

2021 Kenworth W990 Sleeper Semi Truck - 76" Mid Roof Sleeper, Cummins 500HP, 12 Speed Endurant Automatic

Price Drop $79,950 USD

2021 Kenworth W990 sleeper truck offers premium features and a strong spec for owner-operators and fleets alike. Highlighted upgrades include chicken lights, a full gauge package, in-dash...

Condition	Used
Usage	483,049 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automatic
Sleeper Type	Mid Roof Sleeper
Sleeper Size	76"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.87 ratio
Stock Number	CO11128
MLS Number	14120116
Category	Sleeper Semi Trucks
Last Updated	2/27/2026
Location	Commerce City, CO, US
Sold By	Michelle Sells Trucks

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 560HP, 12 Speed Automatic

Recently Updated

$50,500 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 590,313 miles, 560HP DD16 diesel engine, 12-speed automatic transmission by Detroit, 72" integral sleeper, tandem rear axle,...

Condition	Used
Usage	590,314 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	560 HP
Engine Model	DD16
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	366173
MLS Number	14116333
Category	Sleeper Semi Trucks
Last Updated	2/24/2026
Location	Brooklyn Park, MN, US
Sold By	Penske Used Trucks

2020 Freightliner Cascadia 126 Sleeper Semi Truck - 72" Integral Sleeper, 560HP, 12 Speed Automatic

$50,000 USD

Used 2020 Freightliner Cascadia 126 Sleeper Semi Truck for sale, 596,939 miles, 560HP DD16 diesel engine, 12-speed Detroit automatic transmission, 72" integral sleeper, tandem rear axle, air...

Condition	Used
Usage	596,941 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	560 HP
Engine Model	DD16
Transmission	12 Speed Automatic
Sleeper Type	Integral Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	366172
MLS Number	14099052
Category	Sleeper Semi Trucks
Last Updated	2/24/2026
Location	Brooklyn Park, MN, US
Sold By	Penske Used Trucks

(844) 956-___ SHOW
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2023 Peterbilt 579 Sleeper Semi Truck - 80" Raised Roof Sleeper, Cummins 500HP, 12 Speed Endurant Amt

Contact for price

Cummins X15 6 Cylinder 15.0 L Diesel 500 hp Engine, 2022 US EPA Label, CARB Compliant, Requires Diesel Exhaust Fluid, 120 gal Left Fuel Tank 150 gal Right Fuel Tank, Premier Interior, Dual...

Condition	Used
Usage	312,942 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Raised Roof Sleeper
Sleeper Size	80"
Suspension	Pete Low Air Leaf
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.79 ratio
Stock Number	D2698
MLS Number	14120817
Category	Sleeper Semi Trucks
Last Updated	2/20/2026
Location	West Sacramento, CA, US
Sold By	DeWald Equipment

(844) 385-___ SHOW
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2019 Freightliner PT126064ST Sleeper Semi Truck - 72" Condo Sleeper, 505HP, 12 Speed Automatic

$49,080 USD

Condition	Used
Usage	696,379 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	DD15 GHG'17 505/1625
Transmission	12 Speed Automatic
Sleeper Type	Condo Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Stock Number	597561
MLS Number	13740105
Category	Sleeper Semi Trucks
Last Updated	2/19/2026
Location	Memphis, TN, US
Sold By	Ryder

(855) 981-___ SHOW
NUMBERCall Seller

2018 Freightliner Cascadia 125 Sleeper Semi Truck - Mid Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Automatic

$35,900 USD

2018 Freightliner Cascadia 125 Specs:, -HP:505, -Drive: 6x4, -Engine: Detroit DD15, -Mileage: 484,686, -Dual Tires 22.5LP, -Wheels: All Aluminum, -Suspension: Air-Ride, -Single Bunk Sleeper,...

Condition	Used
Usage	484,686 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	Mid Roof Sleeper
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb
Stock Number	TNHC8589LAK Web
MLS Number	14153755
Category	Sleeper Semi Trucks
Last Updated	2/19/2026
Location	Lakeland, FL, US
Sold By	Nationwide Haul