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Detroit RT40-4N Rear Differentials For Sale

Shop used Detroit RT40-4N Rear Differentials on MyLittleSalesman.com . Compare active listings with prices from $650 to $950. Sellers include Rocky Mountain Truck Parts, CRG Heavy Truck Parts, and Manders Diesel. Filter by condition, price, or year to find the Detroit RT40-4N Rear Differential that fits your job.
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   Differentials, Rear (18)
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Detroit (18)
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RT40-4N (18)
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Showing 1 - 18 of 18 Rear Differential Listings

1 - 18 of 18 listings
1 - 18 of 18 listings
Detroit RT40-4N Rear Differential for a 2014 Freightliner Cascadia 125

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...
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 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
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CRG Heavy Truck Parts
Detroit RT40-4N Rear Differential for a 2018 Freightliner Cascadia 125

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

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(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:...
ConditionUsed
Rear End3.23 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2018
Part NumberC11-00042-501
Stock NumberP-60035
MLS Number12332375
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 Differential for a 2016 Western Star 5700

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

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(Used) 2016 Western Star 5700, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-503, Serial Number: 771AAC-A178020T, 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 NumberC11-00042-503
Stock NumberP-78055
MLS Number12790324
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 Differential for a 2018 Freightliner Cascadia 126

Detroit RT40-4N Rear Differential for a 2018 Freightliner Cascadia 126

Contact for price
(Used) 2018 Freightliner Cascadia 126, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-390, Serial Number: 771AAC-A239971T, Make: Detroit, Model: RT40-4N, Ratio: 3.08,...
ConditionUsed
Rear End3.08 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 126
Will Fit Year(s)2018
Part NumberC11-00042-390
Stock NumberP-97051
MLS Number13413538
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 Differential for a 2016 Western Star 5700

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

Contact for price
(Used) 2016 Western Star 5700, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-618, Serial Number: 771AAC-A187523T, 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-112066
MLS Number13856141
CategoryDifferentials, Rear
Last Updated6/29/2026
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: C11-00042-143, Serial Number: 771AAC-A207402T, Make: Detroit, Model: RT40-4N, Ratio: 3.08, Capacity: 20,000...
ConditionUsed
Rear End3.08 ratio
Fits To Make(s)Freightliner
Fits To Model(s)Cascadia 125
Will Fit Year(s)2017
Part NumberC11-00042-143
Stock NumberP-494589
MLS Number14097831
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 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 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
Email Seller
Save
CRG Heavy Truck Parts
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