Tri Axle Flat Top Sleeper Semi Trucks For Sale

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2007 Peterbilt 379 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Caterpillar 550HP, 18 Speed Manual

Newly Listed

$84,900 USD

550 hp Cat with 500,000 on overhaul, 18 speed manual, steerable pusher axle, 11R22.5 tires on aluminum wheels, New pusher tires, New drive tires, air slide 5th wheel, drive axle fenders,...

Condition	Used
Usage	1,113,152 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	550 HP
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Stock Number	4022
MLS Number	14153717
Category	Sleeper Semi Trucks
Last Updated	2/19/2026
Location	New Salem, ND, US
Sold By	Pedigree Truck and Trailer Sales, Inc.

(833) 801-___ SHOW
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2019 Freightliner Cascadia 125 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Detroit 505HP, 10 Speed Manual

2015 Western Star 4900 Tri Axle Sleeper Semi Truck - 36" Flat Top Sleeper, Detroit 505HP, 18 Speed Ultrashift Plus Amt

Newly Listed

$35,000 USD

HEAVY DUTY TRUCK! RUNS EXCELLENT! STEERABLE AIR LIFT AXLE, THICK FRAME, FULL LOCKING REARS, AIR SEAT, POWER WINDOWS, DUAL EXHAUST, PTO! *18 SPEED AUTOMATIC TRANSMISSION!!,

Condition	Used
Usage	347,874 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	505 HP
Engine Model	Detroit DD15TC
Drivetrain	8x4
Transmission	18 Speed Ultrashift Plus Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	36"
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	46,000 lb 4.30 ratio
Stock Number	15DET347TRIWS
MLS Number	14147507
Category	Sleeper Semi Trucks
Last Updated	2/17/2026
Location	Covington, TN, US
Sold By	Don Baskin Truck Sales

(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	2/14/2026
Location	WINGER, MN, US
Sold By	Lucken Trucks and Parts

2008 Peterbilt 386 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Caterpillar 500HP, 13 Speed Manual

$61,500 USD

2008 Pete 386 with Cat C15 Deleted, Cat reman less the 100k miles ago. 13 spd manual trans, 3.90 rear ends and a steerable lift axle. New Drive tires,

Condition	Used
Usage	30,156 Hours
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Caterpillar C15
Drivetrain	8x4
Transmission	13 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	52,000 lb 3.90 ratio
Stock Number	BTS2298
MLS Number	14120079
Category	Sleeper Semi Trucks
Last Updated	2/13/2026
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

2012 Western Star 4900 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Detroit 500HP, 18 Speed Manual

$62,500 USD

2011 Western Star 4900SA, Only 50,000 original miles, 500 HP Detroit DD15, 18 Speed Overdrive transmission with 4.30 gears, 46k rear ends with full lockers. 16K front axle and #13,200...

Condition	Used
Usage	6,381 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	AirLiner
Rear Axle	Tri Axle
Rear End	59,200 lb 4.30 ratio
Stock Number	BTS0242
MLS Number	14140818
Category	Sleeper Semi Trucks
Last Updated	2/12/2026
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

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

$59,500 USD

2011 Western Star 4900SA, Only 52,000 original miles, 500 HP Detroit DD15, 18 Speed Overdrive transmission with 4.30 gears, 46k rear ends with full lockers. 16K front axle and #13,200...

Condition	Used
Usage	50,958 Miles
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	AirLiner
Rear Axle	Tri Axle
Rear End	59,200 lb 4.30 ratio
Stock Number	BTS7824
MLS Number	14140776
Category	Sleeper Semi Trucks
Last Updated	2/12/2026
Location	Great Falls, MT, US
Sold By	Bouma Truck Sales

(716) 218-___ SHOW
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2024 Peterbilt 389 Tri Axle Sleeper Semi Truck - 72" Flat Top Sleeper, Cummins 605HP, 18 Speed Endurant Amt

Price Drop $209,750 USD

605 HP CUMMINS,18-SPD AUTOMATED TRANS,20000 FRT,52000RR,20000 PUSHER.4.10 RATIO,72::FLATTOP,189000 MILES NEWAY SUSP,

Condition	Used
Usage	189,000 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	605 HP
Engine Model	Cummins X15
Drivetrain	8x4
Transmission	18 Speed Endurant Automated
Sleeper Type	Flat Top Sleeper
Sleeper Size	72"
Suspension	Neway
Rear Axle	Tri Axle
Rear End	52,000 lb 4.10 ratio
Stock Number	263280
MLS Number	14070056
Category	Sleeper Semi Trucks
Last Updated	2/10/2026
Location	Buffalo, NY, US
Sold By	Hunter Truck

(844) 748-___ SHOW
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2014 Kenworth W900 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Cummins 600HP, 18 Speed Manual

Contact for price

COMING IN LATER THIS MONTH, 2014 KENWORTH W900 WITH CUMMINS ISX15 600HP (DELETED) AND 18 SPEED TRANS 35,000 MILES ON A PLATINUM REBUILD. 389,255 ON THE ODOMETER. TRIAXLE TRAIN HORN ALL LED...

Condition	Used
Usage	389,255 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	600 HP
Engine Model	Cummins ISX15
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	23,000 lb 3.73 ratio
Stock Number	386681
MLS Number	14127399
Category	Sleeper Semi Trucks
Last Updated	2/5/2026
Location	Beverly, WV, US
Sold By	TFS Recovery, Inc.

(888) 853-___ SHOW
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2017 Kenworth T880 Tri Axle Sleeper Semi Truck - Flat Top Sleeper, Paccar 500HP, 18 Speed Manual

$49,900 USD

Paccar MX13 500 HP, 18 speed RTLO18918B Transmission, 3.55 rear ratio, full locking rears, air slide 5th wheel, steerable pusher axle, 11R22.5 tires on aluminum wheels, dual exhaust,...

Condition	Used
Usage	874,908 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	500 HP
Engine Model	Paccar MX-13
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Suspension	Air Ride
Rear Axle	Tri Axle
Rear End	3.55 ratio
Stock Number	5554
MLS Number	14099909
Category	Sleeper Semi Trucks
Last Updated	2/3/2026
Location	New Salem, ND, US
Sold By	Pedigree Truck and Trailer Sales, Inc.

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

$125,900 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	1/31/2026
Location	Idaho Falls, ID, US
Sold By	Dad's Truck and Trailer Sales

(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, Cab: Wet Kit Sleeper Tractor,

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	1/31/2026
Location	Clairmont, AB, Canada
Sold By	Brandt

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

$114,900 USD

Manual 18 speed transmission with 560HP DD16 engine and 46,000 rears

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	1/31/2026
Location	Saco, ME, 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

$68,450 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	1/22/2026
Location	HOT SPRINGS, AR, US
Sold By	3W Equipment

(833) 904-___ SHOW
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2016 Western Star 4900 Tri Axle Sleeper Semi Truck - 42" Flat Top Sleeper, Detroit 561HP, 18 Speed Manual

$77,500 USD

2016 Western Star 4900, Reman Detroit DD16 in May 2024, 18 speed with 2 speed rears, Full double frame, Full locking rears, 20k front with dual boxes, 20k pusher, 46k rears, Nationwide...

Condition	Used
Usage	537,788 Miles
Duty Class	Heavy Duty Sleeper Semi Truck
Horse Power	561 HP
Engine Model	Detroit DD16
Drivetrain	8x4
Transmission	18 Speed Manual
Sleeper Type	Flat Top Sleeper
Sleeper Size	42"
Suspension	Neway
Rear Axle	Tri Axle
Rear End	66,000 lb 4.10 ratio
Stock Number	8326
MLS Number	14094788
Category	Sleeper Semi Trucks
Last Updated	1/16/2026
Location	Sawyer, KS, US
Sold By	The Wrays, LLC

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

$59,500 USD

2011 Western Star 4900SA, Only 52,000 original miles, 500 HP Detroit DD15, 18 Speed Overdrive transmission with 4.30 gears, 46k rear ends with full lockers. 16K front axle and #13,200...

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	1/21/2026
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