12 Speed Flat Top Sleeper Semi Trucks For Sale

(609) 318-___ SHOW
NUMBERCall Seller

2020 Kenworth T880 Sleeper Semi Truck - 40" Flat Top Sleeper, Paccar 455HP, 12 Speed Amt

Newly Listed

$52,900 USD

READY FOR WORK!,

Condition	Used
Usage	354,836 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	40"
Suspension	8 Bag Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.85 ratio
Stock Number	285286
MLS Number	14081928
Category	Sleeper Semi Trucks
Last Updated	1/13/2026
Location	Millstone Township, NJ, US
Sold By	Hunter Truck

(484) 544-___ SHOW
NUMBERCall Seller

2021 Peterbilt 579 Sleeper Semi Truck - Flat Top Sleeper, Cummins 450HP, 12 Speed Endurant Amt

Price Drop $55,900 USD

Cummins Powered Low Roof short bunk. Perfect for Regional Work with overnight runs

Condition	Used
Usage	13,115 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Cummins X15
Emission Rating	USA Tier 4
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Flat Top Sleeper
Suspension	Pete Low Air Leaf
Rear Axle	Tandem Axle
Rear End	40,000 lb 2.93 ratio
Stock Number	229299
MLS Number	13910419
Category	Sleeper Semi Trucks
Last Updated	1/6/2026
Location	Allentown, PA, US
Sold By	Hunter Truck

(866) 751-___ SHOW
NUMBERCall Seller

2026 Western Star 49X Sleeper Semi Truck - 60" Mid Roof Sleeper, Detroit 600HP, 12 Speed Dt12 Amt

$222,650 USD

NEW ARRIVAL!!!! 2026 WESTERN STAR 49XSF!!! BIG HORSEPOWER!!!! 600HP DD16, 1850 TORQUE. HEAVY SPEC TRUCK!!! 46K REAR 16K FRONT. BEAUTIFUL TRUCK! COMFORTABLE TO DRIVE.! FEDERAL EXCISE...

Condition	New
Usage	498 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	600 HP
Engine Model	Detroit DD16
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	60"
Suspension	AirLiner
Rear Axle	Tandem Axle
Rear End	46,000 lb 3.21 ratio
Stock Number	109848
MLS Number	13576732
Category	Sleeper Semi Trucks
Last Updated	12/16/2025
Location	Bowling Green, KY, US
Sold By	Boyd Truck Centers

(855) 489-___ SHOW
NUMBERCall Seller

2020 Peterbilt 579 Sleeper Semi Truck - 44" Flat Top Sleeper, Paccar 455HP, 12 Speed Endurant Amt

$38,000 USD

Includes 6 month/50k Mile Premium 2000 Warranty (Engine, Turbo, Injectors, Aftertreatment), 455hp with Endurant 12 Speed Transmission, 44" Flat Top Sleeper,

Condition	Used
Usage	618,718 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	44"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.64 ratio
Stock Number	2188
MLS Number	13987056
Category	Sleeper Semi Trucks
Last Updated	12/11/2025
Location	Rhome, TX, US
Sold By	Jordan Truck Sales of Texas, LLC

(855) 489-___ SHOW
NUMBERCall Seller

2020 Peterbilt 579 Sleeper Semi Truck - 44" Flat Top Sleeper, Paccar 455HP, 12 Speed Endurant Amt

$39,000 USD

Price Includes 6 month/50k Mile Premium 2000 Warranty (Engine, Turbo, Injectors, Aftertreatment), 455hp with Endurant 12 Speed Transmission, 44" Flat Top Sleeper,

Condition	Used
Usage	589,489 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	Paccar MX-13
Drivetrain	6x4
Transmission	12 Speed Endurant Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	44"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.64 ratio
Stock Number	2144
MLS Number	13862637
Category	Sleeper Semi Trucks
Last Updated	12/11/2025
Location	Rhome, TX, US
Sold By	Jordan Truck Sales of Texas, LLC

2020 Mack Anthem 64T Sleeper Semi Truck - 48" Flat Top Sleeper, 445HP, 12 Speed Automatic

$74,134 USD

Condition	Used
Usage	411,399 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	445 HP
Engine Model	MP8'17 445/1300-1700
Transmission	12 Speed Automatic
Sleeper Type	Flat Top Sleeper
Sleeper Size	48"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.08 ratio
Stock Number	896505
MLS Number	14024028
Category	Sleeper Semi Trucks
Last Updated	12/10/2025
Location	Taylor, MI, US
Sold By	Ryder

(833) 478-___ SHOW
NUMBERCall Seller

2020 Freightliner Cascadia 116 Sleeper Semi Truck - 42" Flat Top Sleeper, Detroit 450HP, 12 Speed Dt12 Automatic

Contact for price

2020 Freightliner Cascadia 116 – Fleet Maintained Ready to Roll Stock #6830 Super Light Super clean fleet-maintained Cascadia with great miles and all the right specs for a starter truck...

Condition	Used
Usage	513,791 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Detroit DD13
Drivetrain	6x4
Transmission	12 Speed Detroit DT12 Automatic
Sleeper Type	Flat Top Sleeper
Sleeper Size	42"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	6830
MLS Number	13879664
Category	Sleeper Semi Trucks
Last Updated	1/15/2026
Location	Palmetto, GA, US
Sold By	7E Truck Sales, LLC

2020 Volvo VNL64T760 Sleeper Semi Truck - 48" Flat Top Sleeper, 455HP, 12 Speed Automatic

$49,916 USD

Condition	Used
Usage	703,925 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	455 HP
Engine Model	D13'17 455/2100
Transmission	12 Speed Automatic
Sleeper Type	Flat Top Sleeper
Sleeper Size	48"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	2.47 ratio
Stock Number	244933
MLS Number	13998382
Category	Sleeper Semi Trucks
Last Updated	11/22/2025
Location	Taylor, MI, US
Sold By	Ryder

2020 Mack Anthem 64T Sleeper Semi Truck - 70" Flat Top Sleeper, 12 Speed Automatic

$63,424 USD

Condition	Used
Usage	477,295 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	445 HP
Engine Model	MP8-445C 445/1300
Transmission	12 Speed Automatic
Sleeper Type	Flat Top Sleeper
Sleeper Size	70"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.08 ratio
Stock Number	881988
MLS Number	13868586
Category	Sleeper Semi Trucks
Last Updated	12/10/2025
Location	Atlanta, GA, US
Sold By	Ryder

2020 Mack Anthem 64T Sleeper Semi Truck - 72" Flat Top Sleeper, 445HP, 12 Speed Automatic

$47,861 USD

Condition	Used
Usage	675,323 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	445 HP
Engine Model	MP8-445C 445/1300
Transmission	12 Speed Automatic
Sleeper Type	Flat Top Sleeper
Sleeper Size	72"
Suspension	Air Ride
Rear Axle	Tandem Axle
Rear End	3.08 ratio
Stock Number	881980
MLS Number	13726034
Category	Sleeper Semi Trucks
Last Updated	1/14/2026
Location	Fontana, CA, US
Sold By	Ryder

(866) 751-___ SHOW
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2026 Western Star 49X Sleeper Semi Truck - 60" Mid Roof Sleeper, Detroit 505HP, 12 Speed Dt12 Amt

$210,000 USD

NEW WESTERN STAR 49X 60 IN MID ROOF SLEEPER. 505HP DD15. NICE TRUCK THAT IS READY TO WORK

Condition	New
Usage	563 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	Flat Top Sleeper
Sleeper Size	60"
Suspension	AirLiner
Rear Axle	Tandem Axle
Rear End	40,000 lb 3.08 ratio
Stock Number	109849
MLS Number	13576917
Category	Sleeper Semi Trucks
Last Updated	8/1/2025
Location	Bowling Green, KY, US
Sold By	Boyd Truck Centers