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Detroit RT40-4N Axles & Differentials For Sale

Browse Detroit RT40-4N Axles & Differentials for sale on MyLittleSalesman.com. Compare prices, photos, and seller details across 76 listings. Detroit RT40-4N pricing ranges from $650 to $3,475 based on recent marketplace data. Filter by condition, price, or year to find the right Detroit RT40-4N.
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   Axle Assemblies, Rear (13)    Axle Housings, Rear (22)    Differentials, Front (20)    Differentials, Rear (21)
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Showing 1 - 25 of 76 Listings

1 - 25 of 76 listings
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Detroit RT40-4N Front Differential for a 2016 Western Star 5700

Detroit RT40-4N Front Differential for a 2016 Western Star 5700

Recently Updated
Contact for price
(Used) 2016 Western Star 5700, COMPLETE FRONT DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-618, Serial Number: 771AAC-A187523H, Make: Detroit, Model: RT40-4N, Ratio: 3.08, Capacity:...
ConditionUsed
Rear End3.08 ratio
Fits To Make(s)Western Star
Fits To Model(s)5700
Will Fit Year(s)2016
Part NumberC11-00042-618
Stock NumberP-112054
MLS Number13856129
CategoryDifferentials, Front
Last Updated8/16/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Detroit RT40-4N Front Differential for a 2014 Freightliner Cascadia 125

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

Contact for price
(Used) 2014 Freightliner Cascadia 125, FRONT DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-045, Serial Number: 771AAC-A112546H, Make: Detroit, Model: RT40-4N, Ratio: 2.53, Capacity: 20,000...
ConditionUsed
Rear End2.53 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2014
Part NumberC11-00042-045
Stock NumberP-498546
MLS Number14166970
CategoryDifferentials, Front
Last Updated8/8/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Differential for a 2018 Freightliner M2 106

Detroit RT40-4N Rear Differential for a 2018 Freightliner M2 106

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(Used) 2018 Freightliner M2 106, REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-031, Serial Number: 771AAC-A233152T, Make: Detroit, Model: RT40-4N, Ratio: 4.78, Capacity: 20,000 Lbs,...
ConditionUsed
Rear End4.78 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2018
Part NumberC11-00042-031
Stock NumberP-509831
MLS Number14506943
CategoryDifferentials, Rear
Last Updated7/25/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Housing for a 2018 Freightliner M2 106

Detroit RT40-4N Rear Axle Housing for a 2018 Freightliner M2 106

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(Used) 2018 Freightliner M2 106, REAR DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-031, Serial Number: 771AAC-A233152T, Make: Detroit, Model: RT40-4N, Ratio: 4.78, Capacity: 20,000 Lbs,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2018
Part NumberC11-00042-031
Stock NumberP-509829
MLS Number14506941
CategoryAxle Housings, Rear
Last Updated7/25/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Assembly for a 2018 Freightliner M2 106

Detroit RT40-4N Rear Axle Assembly for a 2018 Freightliner M2 106

Contact for price
(Used) 2018 Freightliner M2 106, COMPLETE REAR REAR TANDEM- Part Number: C11-00042-031, Serial Number: 771AAC-A233152T, Make: Detroit, Model: RT40-4N, Ratio: 4.78, Capacity: 20,000 Lbs, Hub...
ConditionUsed
Rear End4.78 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2018
Part NumberC11-00042-031
Stock NumberP-509824
MLS Number14506935
CategoryAxle Assemblies, Rear
Last Updated7/25/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Detroit RT40-4N Front Differential for a 2018 Freightliner M2 106

Detroit RT40-4N Front Differential for a 2018 Freightliner M2 106

Contact for price
(Used) 2018 Freightliner M2 106, FRONT DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-031, Serial Number: 771AAC-A233152H, Make: Detroit, Model: RT40-4N, Ratio: 4.78, Capacity: 20,000 Lbs,...
ConditionUsed
Rear End4.78 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2018
Part NumberC11-00042-031
Stock NumberP-509818
MLS Number14506928
CategoryDifferentials, Front
Last Updated7/25/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Housing for a 2018 Freightliner M2 106

Detroit RT40-4N Rear Axle Housing for a 2018 Freightliner M2 106

Contact for price
(Used) 2018 Freightliner M2 106, FRONT DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-031, Serial Number: 771AAC-A233152H, Make: Detroit, Model: RT40-4N, Ratio: 4.78, Capacity: 20,000 Lbs...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2018
Part NumberC11-00042-031
Stock NumberP-509816
MLS Number14506926
CategoryAxle Housings, Rear
Last Updated7/25/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Detroit RT40-4N Front Differential for a 2018 Freightliner M2 106

Detroit RT40-4N Front Differential for a 2018 Freightliner M2 106

Contact for price
(Used) 2018 Freightliner M2 106, COMPLETE FRONT REAR TANDEM- Part Number: C11-00042-031, Serial Number: 771AAC-A233152H, Make: Detroit, Model: RT40-4N, Ratio: 4.78, Capacity: 20,000 Lbs, Hub...
ConditionUsed
Rear End4.78 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2018
Part NumberC11-00042-031
Stock NumberP-509813
MLS Number14506923
CategoryDifferentials, Front
Last Updated7/26/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Differential for a 2019 Freightliner Cascadia 126

Detroit RT40-4N Rear Differential for a 2019 Freightliner Cascadia 126

Contact for price
(Used) 2019 Freightliner Cascadia 126, REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-751, Serial Number: 771198B0036937, Make: Detroit, Model: RT40-4N, Ratio: 2.85, Capacity: 20,000...
ConditionUsed
Rear End2.85 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 126
Will Fit Year(s)2019
Part NumberC11-00042-751
Stock NumberP-508686
MLS Number14480339
CategoryDifferentials, Rear
Last Updated7/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Housing for a 2019 Freightliner Cascadia 126

Detroit RT40-4N Rear Axle Housing for a 2019 Freightliner Cascadia 126

Contact for price
(Used) 2019 Freightliner Cascadia 126, REAR DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-751, Serial Number: 771198B0036937, Make: Detroit, Model: RT40-4N, Ratio: 2.85, Capacity: 20,000...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 126
Will Fit Year(s)2019
Part NumberC11-00042-751
Stock NumberP-508685
MLS Number14480338
CategoryAxle Housings, Rear
Last Updated7/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Assembly for a 2019 Freightliner Cascadia 126

Detroit RT40-4N Rear Axle Assembly for a 2019 Freightliner Cascadia 126

Contact for price
(Used) 2019 Freightliner Cascadia 126, COMPLETE REAR REAR TANDEM- Part Number: C11-00042-751, Serial Number: 771198B0036937, Make: Detroit, Model: RT40-4N, Ratio: 2.85, Capacity: 20,000 Lbs,...
ConditionUsed
Rear End2.85 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 126
Will Fit Year(s)2019
Part NumberC11-00042-751
Stock NumberP-508684
MLS Number14480337
CategoryAxle Assemblies, Rear
Last Updated7/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Front Differential for a 2019 Freightliner Cascadia 126

Detroit RT40-4N Front Differential for a 2019 Freightliner Cascadia 126

Contact for price
(Used) 2019 Freightliner Cascadia 126, FRONT DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-751, Serial Number: 771199B0036936, Make: Detroit, Model: RT40-4N, Ratio: 2.85, Capacity: 20,000...
ConditionUsed
Rear End2.85 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 126
Will Fit Year(s)2019
Part NumberC11-00042-751
Stock NumberP-508678
MLS Number14480332
CategoryDifferentials, Front
Last Updated7/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Housing for a 2019 Freightliner Cascadia 126

Detroit RT40-4N Rear Axle Housing for a 2019 Freightliner Cascadia 126

Contact for price
(Used) 2019 Freightliner Cascadia 126, FRONT DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-751, Serial Number: 771199B0036936, Make: Detroit, Model: RT40-4N, Ratio: 2.85, Capacity:...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 126
Will Fit Year(s)2019
Part NumberC11-00042-751
Stock NumberP-508677
MLS Number14480331
CategoryAxle Housings, Rear
Last Updated7/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Front Differential for a 2019 Freightliner Cascadia 126

Detroit RT40-4N Front Differential for a 2019 Freightliner Cascadia 126

Contact for price
(Used) 2019 Freightliner Cascadia 126, COMPLETE FRONT REAR TANDEM- Part Number: C11-00042-751, Serial Number: 771199B0036936, Make: Detroit, Model: RT40-4N, Ratio: 2.85, Capacity: 20,000 Lbs...
ConditionUsed
Rear End2.85 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 126
Will Fit Year(s)2019
Part NumberC11-00042-751
Stock NumberP-508676
MLS Number14480330
CategoryDifferentials, Front
Last Updated7/14/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Front Differential for a 2018 Western Star 5700

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

Contact for price
(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,...
ConditionUsed
Rear End3.08 ratio
Fits To Make(s)Western Star
Fits To Model(s)5700
Will Fit Year(s)2018
Part NumberC11-00042-143
Stock NumberP-501133
MLS Number14273821
CategoryDifferentials, Front
Last Updated7/11/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Assembly for a 2018 Western Star 5700

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...
ConditionUsed
Rear End3.08 ratio
Fits To Make(s)Western Star
Fits To Model(s)5700
Will Fit Year(s)2018
Part NumberC11-00042-143
Stock NumberP-501136
MLS Number14273824
CategoryAxle Assemblies, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Housing for a 2018 Western Star 5700

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,...
ConditionUsed
Fits To Make(s)Western Star
Fits To Model(s)5700
Will Fit Year(s)2018
Part NumberC11-00042-143
Stock NumberP-501137
MLS Number14273825
CategoryAxle Housings, Rear
Last Updated6/21/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Differential for a 2018 Western Star 5700

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,...
ConditionUsed
Rear End3.08 ratio
Fits To Make(s)Western Star
Fits To Model(s)5700
Will Fit Year(s)2018
Part NumberC11-00042-143
Stock NumberP-501138
MLS Number14273826
CategoryDifferentials, Rear
Last Updated6/22/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Assembly for a 2014 Freightliner Cascadia 125

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

Contact for price
(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:...
ConditionUsed
Rear End3.31 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2014
Stock NumberP-42167
MLS Number11942380
CategoryAxle Assemblies, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Housing for a 2014 Freightliner Cascadia 125

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

Contact for price
(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...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2014
Stock NumberP-42168
MLS Number11942381
CategoryAxle Housings, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Differential for a 2014 Freightliner Cascadia 125

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

Contact for price
(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...
ConditionUsed
Rear End3.31 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2014
Stock NumberP-42170
MLS Number11942383
CategoryDifferentials, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Assembly for a 2016 Western Star 5700

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

Contact for price
Detroit DA-RT-40.0-4 HT Tandem Cutoff - Used - Ratio: 3.31 - Drum Brakes - Air Bag Suspension - 40,000 LBS Capacity, Power Divider is Locker, Part Number: 771AAC - RT40-4N Rear Rear...
ConditionUsed
Fits To Make(s)Western Star
Fits To Model(s)5700
Will Fit Year(s)2016
Part NumberDA-RT-40.4 HT
Stock NumberWS-0796-26
MLS Number12227072
CategoryAxle Assemblies, Rear
Last Updated6/13/2026
Location
York, ON, Canada
Sold By
Lomoca Inc.
(833) 835-___  SHOW
NUMBERCall Seller
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Lomoca Inc.
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