Detroit RT40-4N Axles &amp; Differentials For Sale

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Detroit RT40-4N Rear Differential for a 2017 Freightliner Cascadia

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MILES N/A HAS LOCKER, Ratio: 228

Condition	Used
Rear End	2.28 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia
Will Fit Year(s)	2017
Stock Number	JH8652-4
MLS Number	13299272
Category	Differentials, Rear
Last Updated	5/14/2026
Location	Farr West, UT, US
Sold By	Rocky Mountain Truck Parts

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Detroit RT40-4N Rear Differential for a 2020 Freightliner Cascadia

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REAR 21-RN MILES 515407, Ratio: 308

Condition	Used
Rear End	3.08 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia
Will Fit Year(s)	2020
Stock Number	KP5078-5
MLS Number	13249809
Category	Differentials, Rear
Last Updated	5/14/2026
Location	Farr West, UT, US
Sold By	Rocky Mountain Truck Parts

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Detroit RT40-4N Front Differential for a 2020 Freightliner Cascadia

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FRONT RT 23-4N MILES 515407, Ratio: 308

Condition	Used
Rear End	3.08 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia
Will Fit Year(s)	2020
Stock Number	KP5078-4
MLS Number	13249808
Category	Differentials, Front
Last Updated	5/14/2026
Location	Farr West, UT, US
Sold By	Rocky Mountain Truck Parts

Detroit RT40-4N Front Differential for a 2018 Western Star 5700

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(Used) 2018 Western Star 5700, COMPLETE FRONT REAR TANDEM- Part Number: C11-00042-143, Serial Number: 771AAC-A242503H, Make: Detroit, Model: RT40-4N, Ratio: 3.08, Capacity: 20,000 Lbs, Hub...

Condition	Used
Rear End	3.08 ratio
Fits To Make(s)	Western Star
Fits To Model(s)	5700
Will Fit Year(s)	2018
Part Number	C11-00042-143
Stock Number	P-501131
MLS Number	14273819
Category	Differentials, Front
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Housing for a 2018 Western Star 5700

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(Used) 2018 Western Star 5700, FRONT DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-143, Serial Number: 771AAC-A242503H, Make: Detroit, Model: RT40-4N, Ratio: 3.08, Capacity: 20,000 Lbs,...

Condition	Used
Fits To Make(s)	Western Star
Fits To Model(s)	5700
Will Fit Year(s)	2018
Part Number	C11-00042-143
Stock Number	P-501132
MLS Number	14273820
Category	Axle Housings, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Front Differential for a 2018 Western Star 5700

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(Used) 2018 Western Star 5700, FRONT DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-143, Serial Number: 771AAC-A242503H, Make: Detroit, Model: RT40-4N, Ratio: 3.08, Capacity: 20,000 Lbs,...

Condition	Used
Rear End	3.08 ratio
Fits To Make(s)	Western Star
Fits To Model(s)	5700
Will Fit Year(s)	2018
Part Number	C11-00042-143
Stock Number	P-501133
MLS Number	14273821
Category	Differentials, Front
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Assembly for a 2018 Western Star 5700

Contact for price

(Used) 2018 Western Star 5700, COMPLETE REAR REAR TANDEM- Part Number: C11-00042-143, Serial Number: 771AAC-A242503T, Make: Detroit, Model: RT40-4N, Ratio: 3.08, Capacity: 20,000 Lbs, Hub...

Condition	Used
Rear End	3.08 ratio
Fits To Make(s)	Western Star
Fits To Model(s)	5700
Will Fit Year(s)	2018
Part Number	C11-00042-143
Stock Number	P-501136
MLS Number	14273824
Category	Axle Assemblies, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Housing for a 2018 Western Star 5700

Contact for price

(Used) 2018 Western Star 5700, REAR DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-143, Serial Number: 771AAC-A242503T, Make: Detroit, Model: RT40-4N, Ratio: 3.08, Capacity: 20,000 Lbs,...

Condition	Used
Fits To Make(s)	Western Star
Fits To Model(s)	5700
Will Fit Year(s)	2018
Part Number	C11-00042-143
Stock Number	P-501137
MLS Number	14273825
Category	Axle Housings, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Differential for a 2018 Western Star 5700

Contact for price

(Used) 2018 Western Star 5700, REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-143, Serial Number: 771AAC-A242503T, Make: Detroit, Model: RT40-4N, Ratio: 3.08, Capacity: 20,000 Lbs,...

Condition	Used
Rear End	3.08 ratio
Fits To Make(s)	Western Star
Fits To Model(s)	5700
Will Fit Year(s)	2018
Part Number	C11-00042-143
Stock Number	P-501138
MLS Number	14273826
Category	Differentials, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Assembly for a 2014 Freightliner Cascadia 125

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(Used) 2014 Freightliner Cascadia 125, COMPLETE REAR REAR TANDEM- Make: Detroit, Model: RT40-4N, Ratio: 3.31, Capacity: 20,000 Lbs, Hub Bolts: 10, Brake Type: Drum Serial Number:...

Condition	Used
Rear End	3.31 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2014
Stock Number	P-42167
MLS Number	11942380
Category	Axle Assemblies, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Housing for a 2014 Freightliner Cascadia 125

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(Used) 2014 Freightliner Cascadia 125, REAR DIFFERENTIAL HOUSING ONLY- Make: Detroit, Model: RT40-4N, Ratio: 3.31, Capacity: 20,000 Lbs, Serial Number: 771AAC-A033563T, For more...

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2014
Stock Number	P-42168
MLS Number	11942381
Category	Axle Housings, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Differential for a 2014 Freightliner Cascadia 125

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(Used) 2014 Freightliner Cascadia 125, REAR DIFFERENTIAL GEARS ONLY- Make: Detroit, Model: RT40-4N, Ratio: 3.31, Capacity: 20,000 Lbs, Serial Number: 771AAC-A103364T, For more information...

Condition	Used
Rear End	3.31 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2014
Stock Number	P-42170
MLS Number	11942383
Category	Differentials, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

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Detroit RT40-4N Rear Axle Assembly for a 2016 Western Star 5700

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Detroit DA-RT-40.0-4 HT Tandem Cutoff - Used - Ratio: 3.31 - Drum Brakes - Air Bag Suspension - 40,000 LBS Capacity, Part Number: 771AAC - RT40-4N Rear Rear Differential and ART40-4N Front...

Condition	Used
Fits To Make(s)	Western Star
Fits To Model(s)	5700
Will Fit Year(s)	2016
Part Number	DA-RT-40.4 HT
Stock Number	WS-0796-26
MLS Number	12227072
Category	Axle Assemblies, Rear
Last Updated	5/14/2026
Location	York, ON, Canada
Sold By	Lomoca Inc.

Detroit RT40-4N Front Differential for a 2017 Freightliner Cascadia 125

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(Used) 2017 Freightliner Cascadia 125, COMPLETE FRONT REAR TANDEM- Part Number: C11-00042-734, Serial Number: 771AAC-A210439H, Make: Detroit, Model: RT40-4N, Ratio: 2.41, Capacity: 20,000...

Condition	Used
Rear End	2.41 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2017
Part Number	C11-00042-734
Stock Number	P-55826
MLS Number	12233511
Category	Differentials, Front
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Housing for a 2017 Freightliner Cascadia 125

Contact for price

(Used) 2017 Freightliner Cascadia 125, FRONT DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-734, Serial Number: 771AAC-A210439H, Make: Detroit, Model: RT40-4N, Ratio: 2.41, Capacity: 20...

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2017
Part Number	C11-00042-734
Stock Number	P-55827
MLS Number	12233512
Category	Axle Housings, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Assembly for a 2017 Freightliner Cascadia 125

Contact for price

(Used) 2017 Freightliner Cascadia 125, COMPLETE REAR REAR TANDEM- Part Number: C11-00042-734, Serial Number: 771AAC-A210439T, Make: Detroit, Model: RT40-4N, Ratio: 2.41, Capacity: 20,000...

Condition	Used
Rear End	2.41 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2017
Part Number	C11-00042-734
Stock Number	P-55832
MLS Number	12233517
Category	Axle Assemblies, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Housing for a 2017 Freightliner Cascadia 125

Contact for price

(Used) 2017 Freightliner Cascadia 125, REAR DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-734, Serial Number: 771AAC-A210439T, Make: Detroit, Model: RT40-4N, Ratio: 2.41, Capacity:...

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2017
Part Number	C11-00042-734
Stock Number	P-55833
MLS Number	12233518
Category	Axle Housings, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Differential for a 2017 Freightliner Cascadia 125

Contact for price

(Used) 2017 Freightliner Cascadia 125, REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-734, Serial Number: 771AAC-A210439T, Make: Detroit, Model: RT40-4N, Ratio: 2.41, Capacity:...

Condition	Used
Rear End	2.41 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2017
Part Number	C11-00042-734
Stock Number	P-55834
MLS Number	12233519
Category	Differentials, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Front Differential for a 2018 Freightliner Cascadia 125

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(Used) 2018 Freightliner Cascadia 125, COMPLETE FRONT REAR TANDEM- Part Number: C11-00042-501, Serial Number: 771AAC-A223772H, Make: Detroit, Model: RT40-4N, Ratio: 3.23, Capacity: 20,000...

Condition	Used
Rear End	3.23 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2018
Part Number	C11-00042-501
Stock Number	P-60018
MLS Number	12332358
Category	Differentials, Front
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Housing for a 2018 Freightliner Cascadia 125

Contact for price

(Used) 2018 Freightliner Cascadia 125, FRONT DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-501, Serial Number: 771AAC-A223772H, Make: Detroit, Model: RT40-4N, Ratio: 3.23, Capacity:...

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2018
Part Number	C11-00042-501
Stock Number	P-60022
MLS Number	12332362
Category	Axle Housings, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Front Differential for a 2018 Freightliner Cascadia 125

Contact for price

(Used) 2018 Freightliner Cascadia 125, FRONT DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-501, Serial Number:771AAC-A223772H, Make: Detroit, Model: RT40-4N, Ratio: 3.23, Capacity: 20,000...

Condition	Used
Rear End	3.23 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2018
Part Number	C11-00042-501
Stock Number	P-60023
MLS Number	12332363
Category	Differentials, Front
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Assembly for a 2018 Freightliner Cascadia 125

Contact for price

(Used) 2018 Freightliner Cascadia 125, COMPLETE REAR REAR TANDEM- Part Number: C11-00042-501, Serial Number: 771AAC-A223772T, Make: Detroit, Model: RT40-4N, Ratio: 3.23, Capacity: 20,000...

Condition	Used
Rear End	3.23 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2018
Part Number	C11-00042-501
Stock Number	P-60028
MLS Number	12332368
Category	Axle Assemblies, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Axle Housing for a 2018 Freightliner Cascadia 125

Contact for price

(Used) 2018 Freightliner Cascadia 125, REAR DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-501, Serial Number: 771AAC-A223772T, Make: Detroit, Model: RT40-4N, Ratio: 3.23, Capacity:...

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2018
Part Number	C11-00042-501
Stock Number	P-60030
MLS Number	12332370
Category	Axle Housings, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts

Detroit RT40-4N Rear Differential for a 2018 Freightliner Cascadia 125

Contact for price

(Used) 2018 Freightliner Cascadia 125, REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-501, Serial Number: 771AAC-A223772T, Make: Detroit, Model: RT40-4N, Ratio: 3.23, Capacity:...

Condition	Used
Rear End	3.23 ratio
Fits To Make(s)	Freightliner
Fits To Model(s)	Cascadia 125
Will Fit Year(s)	2018
Part Number	C11-00042-501
Stock Number	P-60035
MLS Number	12332375
Category	Differentials, Rear
Last Updated	5/13/2026
Location	Elkton, MD, US
Sold By	CRG Heavy Truck Parts