Tri Axle Flat Top Sleeper Semi Trucks For Sale

2011 Western Star 4900 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Detroit 500HP, 18 Speed Manual

Newly Listed

$59,500 USD

2011 Western Star 4900SA, 500 hp Detroit DD15, 18 spd Overdrive transmission with 4.30 gears in 46k rear ends with full lockers. 16K front axle and #13,200 steerable lift. 2 Line wet kit

Condition	Used
Usage	10,656 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Detroit DD15
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	59,200 lb
Stock Number	BTS8704
MLS Number	14088452
Category	Sleeper Semi Trucks
Last Updated	1/15/2026
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

(855) 981-___ SHOW
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2024 Peterbilt 389 Tri Axle Sleeper Semi Truck - 72" Flat Top Sleeper, Cummins 605HP, 18 Speed Endurant Amt

2014 Kenworth W900 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Cummins 550HP, 18 Speed Manual

Price Drop $59,990 USD

2014 Kenworth W900 Specs:, -Mileage: 870,396, -Drive: 8x4, -HP: 550, -Engine: Cummins x15, Transmission: Eaton Manual 18 Speed, -Suspension: Air-ride, -Wheels: All Aluminum, -Tires: 11R24.5...

Condition	Used
Usage	870,396 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	550 HP
Engine Model	Cummins X15
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	23,000 lb
Stock Number	TNHC35498LAK Web
MLS Number	13652106
Category	Sleeper Semi Trucks
Last Updated	1/13/2026
Location	Lakeland, FL, US
Sold By	Nationwide Haul

(855) 981-___ SHOW
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2014 Kenworth W900 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Cummins 550HP, 18 Speed Manual

Price Drop $59,990 USD

2014 Kenworth W900 Specs:, -Mileage: 870,396, -Drive: 8x4, -HP: 550, -Engine: Cummins x15, Transmission: Eaton Manual 18 Speed, -Suspension: Air-ride, -Wheels: All Aluminum, -Tires: 11R24.5...

Condition	Used
Usage	870,396 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	550 HP
Engine Model	Cummins X15
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	23,000 lb
Stock Number	TNHC35498LAK
MLS Number	13652104
Category	Sleeper Semi Trucks
Last Updated	1/13/2026
Location	Lakeland, FL, US
Sold By	Nationwide Haul

(833) 538-___ SHOW
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2022 Peterbilt 389 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Cummins 565HP, 13 Speed Manual

Price Drop $128,900 USD

401549 Miles, 10132 Hours, Engine: CUMMINS X15, 565 HP, Fuel Type: Diesel, 13 Speed Manual Transmission, Drive: 8x4, Air Ride Suspension, Sleeper Type: Flat Top Sleeper, Tires: Virgin brand...

Condition	Used
Usage	10,132 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	565 HP
Engine Model	Cummins X15
Drivetrain	8x4
Transmission	13 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	3.25 ratio
Stock Number	3892
MLS Number	14059467
Category	Sleeper Semi Trucks
Last Updated	1/10/2026
Location	Idaho Falls, ID, US
Sold By	Dad's Truck and Trailer Sales

(844) 435-___ SHOW
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2019 Western Star 4900EX Tri Axle Sleeper Semi Truck - Detroit

$114,900 USD

378688 Miles, Engine: DETROIT DD16, Fuel Type: Diesel, 18 Speed Manual Transmission, Drive: 8x4, Sleeper Type: Flat Top Sleeper, Sleeper Size: 54, Wheel Base: 272, Tri Rear Axles, Front Axle...

Condition	Used
Usage	378,688 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Engine Model	Detroit DD16
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	54"
Rear Axle	Tri Axle
Rear End	46,000 lb 4.10 ratio
Stock Number	347449
MLS Number	13556811
Category	Sleeper Semi Trucks
Last Updated	1/6/2026
Location	Manchester, NH, US
Sold By	Allegiance Trucks

(866) 530-___ SHOW
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2015 Western Star 4900 Tri Axle Sleeper Semi Truck - 28" Flat Top Sleeper, Detroit 600HP, 18 Speed Manual

$68,500 USD

3W EQUIPMENT INVENTORY CHANGING DAILY - CALL AHEAD!! LOW RATE FINANCING FOR BUSINESS AND INDIVIDUALS! DON'T MISS THIS ONE!!! SUPER LOW MILEAGE AND HOURS!!! (DELETED) 2015 WESTERN STAR...

Condition	Used
Usage	2,173 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	600 HP
Engine Model	Detroit DD16
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	28"
Suspension	AirLiner
Rear Axle	Tri Axle
Rear End	46,000 lb 4.30 ratio
Stock Number	GK6603
MLS Number	14064705
Category	Sleeper Semi Trucks
Last Updated	12/31/2025
Location	HOT SPRINGS, AR, US
Sold By	3W Equipment

2019 Freightliner Cascadia 125 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Detroit 505HP, 10 Speed Manual

$54,500 USD

JUST IN!!! 2019 Freightliner Cascadia, #13,200 Factory Steerable Lift Axle, Detroit DD15, 505 HP, 10 Speed Manual Transmission. 260" WHEEL BASE. 3.55 REAR ENDS, Aluminum Wheels, Jake Brake,...

Condition	Used
Usage	469,236 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	8x4
Transmission	10 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	53,500 lb 3.55 ratio
Stock Number	BTS8277
MLS Number	14053730
Category	Sleeper Semi Trucks
Last Updated	12/20/2025
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

1994 Peterbilt 378 Tri Axle Sleeper Semi Truck - 36" Flat Top Sleeper, Detroit 450HP, 18 Speed Manual

$57,500 USD

1994 Peterbilt 378, PRE-EMISSION, New Crate Motor Detroit 60 Series engine installed 170,000 miles ago w/paperwork, 450 HP, Reman 18 Speed Manual Transmission installed 170,000 miles ago...

Condition	Used
Usage	1,000,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	450 HP
Engine Model	Detroit SERIES 60 12.7 DDEC III
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	36"
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	52,500 lb 3.90 ratio
Stock Number	BTS3930
MLS Number	14049336
Category	Sleeper Semi Trucks
Last Updated	12/18/2025
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

2015 Peterbilt 367 Tri Axle Sleeper Semi Truck - 36" Flat Top Sleeper, Cummins 485HP, 10 Speed Autoshift Amt

$64,500 USD

Very clean and tight 367 Peterbilt. Recent engine overhaul on ISX Cummins, 10 spd auto shift trans. Steerable lift axle, Ali Arc front bumper. Runs and drives great. Transmission shifts...

Condition	Used
Usage	717,014 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	485 HP
Engine Model	Cummins ISX
Drivetrain	8x4
Transmission	10 Speed Autoshift Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	36"
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	52,000 lb
Stock Number	CON6370
MLS Number	14045877
Category	Sleeper Semi Trucks
Last Updated	12/17/2025
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

(855) 489-___ SHOW
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2020 Kenworth W990 Tri Axle Sleeper Semi Truck - 36" Flat Top Sleeper, Cummins 565HP, 18 Speed Manual

$169,000 USD

Price includes 6 month/50k Mile Premium 2000 Warranty (Engine, Turbo, Injectors, Aftertreatment), 565hp Cummins, 18 speed Manual Transmission, 20K Front Axle, 46K Rears, Full Lockers, 18.5K...

Condition	Used
Usage	201,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	565 HP
Engine Model	Cummins X15P
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	36"
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	66,000 lb 4.10 ratio
Stock Number	2083
MLS Number	13633782
Category	Sleeper Semi Trucks
Last Updated	12/11/2025
Location	Rhome, TX, US
Sold By	Jordan Truck Sales of Texas, LLC

(888) 227-___ SHOW
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2025 Peterbilt 589 Tri Axle Sleeper Semi Truck - 44" Flat Top Sleeper, 565HP

Contact for price

44" Sleeper Tri-Drive, EngineType: X15, EngineMake: Cummins, PowerType: Diesel, Weight: 77,000,

Condition	New
Usage	17 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	565 HP
Sleeper Type	Flat Top Sleeper
Sleeper Size	44"
Rear Axle	Tri Axle
Rear End	66,000 lb 4.10 ratio
Stock Number	16850
MLS Number	13918399
Category	Sleeper Semi Trucks
Last Updated	11/13/2025
Location	Clairmont, AB, Canada
Sold By	Brandt

(724) 648-___ SHOW
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2024 Peterbilt 567 Tri Axle Sleeper Semi Truck - 44" Flat Top Sleeper, Cummins 605HP, 18 Speed Ultrashift Manual

$200,000 USD

NEW 2024 44" LOW ROOF SLEEPER, LEGENDARY BLACK 567 PETERBILT. POWERED WITH X15 ENGINE AT 605HP, 1850 LBS OF TORQUE, EATON RTLO18918B 18 SPD TRANSMISSION. FRONT AXLE 18,740 LBS, REAR AXLE...

Condition	New
Usage	41 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	605 HP
Engine Model	Cummins X15
Drivetrain	6x4
Transmission	18 Speed Ultrashift Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	44"
Suspension	Hendrickson HMX460
Rear Axle	Tri Axle
Rear End	46,000 lb 3.73 ratio
Stock Number	263121
MLS Number	12478963
Category	Sleeper Semi Trucks
Last Updated	11/5/2025
Location	Butler, PA, US
Sold By	Hunter Truck

(833) 637-___ SHOW
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2012 Western Star 4900 Tri Axle Sleeper Semi Truck - 36" Flat Top Sleeper, Detroit 560HP, 18 Speed Manual

$59,900 USD

2012 Western Star 4900, only 24,700 miles, 7816 hrs, DD15 Detroit 560 hp, 18 speed, airliner susp, 20K pusher, 4.10 ratio, 245 wb, headache rack, set up for lowboy,,

Condition	Used
Usage	7,816 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	560 HP
Engine Model	Detroit DD15
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	36"
Suspension	AirLiner
Rear Axle	Tri Axle
Rear End	46,000 lb 4.10 ratio
MLS Number	13791530
Category	Sleeper Semi Trucks
Last Updated	10/18/2025
Location	WINGER, MN, US
Sold By	Lucken Trucks and Parts

(833) 637-___ SHOW
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2012 Western Star 4900 Tri Axle Sleeper Semi Truck - 28" Flat Top Sleeper, Detroit 505HP, 18 Speed Manual

$49,900 USD

2012 Western Star 4900SA, 246,500 miles, DD15-505 hp, Eaton RTLO18918B 18 speed, 4.30 ratio, 244 wb, 14,320 front, 46,000 rears, 12,000 pusher, 180 Gal Fuel cap, Nice heavy truck in great...

Condition	Used
Usage	246,245 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	28"
Suspension	AirLiner
Rear Axle	Tri Axle
Rear End	46,000 lb 4.30 ratio
MLS Number	13542225
Category	Sleeper Semi Trucks
Last Updated	6/25/2025
Location	WINGER, MN, US
Sold By	Lucken Trucks and Parts

(833) 538-___ SHOW
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2019 Peterbilt 389 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Paccar 510HP, 18 Speed Manual

Newly Listed

$70,000 USD

700000 Miles, Engine: PACCAR MX-13, 510 HP, Fuel Type: Diesel, 18 Speed Manual Transmission, Drive: 8x4, Air Ride Suspension, Sleeper Type: Flat Top Sleeper, Wheels: Aluminum, Tri Rear Axles

Condition	Used
Usage	700,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	510 HP
Engine Model	Paccar MX-13
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Stock Number	610741
MLS Number	14094779
Category	Sleeper Semi Trucks
Last Updated	1/17/2026
Location	Idaho Falls, ID, US
Sold By	Dad's Truck and Trailer Sales