1. Home
  2. For Sale
  3. Truck Parts
  4. Axles & Differentials
  5. Detroit
  6. RT40-4N

Detroit RT40-4N Axles & Differentials For Sale

Shop used Detroit RT40-4N Axles & Differentials on MyLittleSalesman.com . Compare active listings with prices from $650 to $3,475. Sellers include LKQ Heavy Truck, Rocky Mountain Truck Parts, CRG Heavy Truck Parts, and more. Filter by condition, price, or year to find the Detroit RT40-4N that fits your job.
Close
Your Current Search
Industry
Truck Parts
Category
Axles & Differentials
Manufacturer
Detroit
Model
RT40-4N
Click the to remove the filter.
Save Search
Email Alert
What's Save Search and Email Alert?
Narrow Your Search
Keyword Search
Search within the selected criteria
Equipment Type
Truck Parts (65)
Category
Axles & Differentials (65)
   Axle Assemblies, Rear (11)    Axle Housings, Rear (19)    Differentials, Front (17)    Differentials, Rear (18)
Make
Detroit (65)
Model
RT40-4N (65)
Condition
Used (65)
Model Year
-
Horsepower
-
Inspection Report
Yes (0)
Warranty
Yes (0)
No (0)
Price
-
Country
State / Region
Select a country to view available states.
Seller Type
Dealerships (65)
Market Type
For Sale (65)

Shop Axles & Differentials by Subcategory

Quick Filters

Showing 1 - 25 of 65 Listings

1 - 25 of 65 listings
1 - 25 of 65 listings
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
Email Seller
Save
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
Email Seller
Save
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
Email Seller
Save
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, FRONT DIFFERENTIAL HOUSING ONLY- Part Number: C11-00042-045, Serial Number: 771AAC-A112546H, Make: Detroit, Model: RT40-4N, Ratio: 2.53, Capacity:...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2014
Part NumberC11-00042-045
Stock NumberP-498545
MLS Number14166969
CategoryAxle Housings, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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 Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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- Part Number: C11-00042-045, Serial Number: 771AAC-A112546T, Make: Detroit, Model: RT40-4N, Ratio: 2.53, Capacity: 20,000 Lbs...
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-498550
MLS Number14166975
CategoryAxle Assemblies, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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- Part Number: C11-00042-045, Serial Number: 771AAC-A112546T, Make: Detroit, Model: RT40-4N, Ratio: 2.53, Capacity:...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2014
Part NumberC11-00042-045
Stock NumberP-498551
MLS Number14166976
CategoryAxle Housings, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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- Part Number: C11-00042-045, Serial Number: 771AAC-A112546T, 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-498552
MLS Number14166977
CategoryDifferentials, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RT40-4N Front Differential for a 2016 Western Star 5700

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

Contact for price
(Used) 2016 Western Star 5700, COMPLETE FRONT REAR TANDEM- Part Number: C11-00042-503, Serial Number: 771AAC-A178020H, 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)2016
Part NumberC11-00042-503
Stock NumberP-500745
MLS Number14260685
CategoryDifferentials, Front
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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, 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...
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-501131
MLS Number14273819
CategoryDifferentials, Front
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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, 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,...
ConditionUsed
Fits To Make(s)Western Star
Fits To Model(s)5700
Will Fit Year(s)2018
Part NumberC11-00042-143
Stock NumberP-501132
MLS Number14273820
CategoryAxle Housings, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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 Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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
Email Seller
Save
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 Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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 Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
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, Part Number: 771AAC - RT40-4N Rear Rear Differential and ART40-4N Front...
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 Updated5/14/2026
Location
York, ON, Canada
Sold By
Lomoca Inc.
(833) 835-___  SHOW
NUMBERCall Seller
Email Seller
Save
Lomoca Inc.
Detroit RT40-4N Front Differential for a 2017 Freightliner Cascadia 125

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

Contact for price
(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...
ConditionUsed
Rear End2.41 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2017
Part NumberC11-00042-734
Stock NumberP-55826
MLS Number12233511
CategoryDifferentials, Front
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Housing for a 2017 Freightliner Cascadia 125

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...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2017
Part NumberC11-00042-734
Stock NumberP-55827
MLS Number12233512
CategoryAxle Housings, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Assembly for a 2017 Freightliner Cascadia 125

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...
ConditionUsed
Rear End2.41 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2017
Part NumberC11-00042-734
Stock NumberP-55832
MLS Number12233517
CategoryAxle Assemblies, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RT40-4N Rear Axle Housing for a 2017 Freightliner Cascadia 125

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:...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2017
Part NumberC11-00042-734
Stock NumberP-55833
MLS Number12233518
CategoryAxle Housings, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RT40-4N Rear Differential for a 2017 Freightliner Cascadia 125

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:...
ConditionUsed
Rear End2.41 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2017
Part NumberC11-00042-734
Stock NumberP-55834
MLS Number12233519
CategoryDifferentials, Rear
Last Updated5/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Save Search
Email Alert
What's Save Search and Email Alert?
Want to narrow or modify your search criteria?
Filter by Price
Filter by Year
Filter by Location
Filter by Model
Filter by Keyword
Modify your search
Did you find what you were looking for? Yes No