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Detroit RS21-4 Axles & Differentials For Sale

Shop used Detroit RS21-4 Axles & Differentials on MyLittleSalesman.com . Compare active listings with prices from $1,475 to $1,475. Sellers include CRG Heavy Truck Parts and LKQ Heavy Truck. Filter by condition, price, or year to find the Detroit RS21-4 that fits your job.
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Truck Parts (14)
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Axles & Differentials (14)
   Axle Assemblies, Rear (6)    Axle Housings, Rear (4)    Differentials, Rear (4)
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Detroit (14)
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RS21-4 (14)
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Showing 1 - 14 of 14 Listings

1 - 14 of 14 listings
1 - 14 of 14 listings
Detroit RS21-4 Rear Differential for a 2024 Freightliner M2 106

Detroit RS21-4 Rear Differential for a 2024 Freightliner M2 106

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(Used) 2024 Freightliner M2 106, DIFFERENTIAL GEARS ONLY- Part Number: C11-00007-217, Serial Number: 742821A0267291, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000 Lbs,...
ConditionUsed
Rear End5.56 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2024
Part NumberC11-00007-217
Stock NumberP-497944
MLS Number14157193
CategoryDifferentials, Rear
Last Updated2/21/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RS21-4 Rear Axle Housing for a 2024 Freightliner M2 106

Detroit RS21-4 Rear Axle Housing for a 2024 Freightliner M2 106

Contact for price
(Used) 2024 Freightliner M2 106, DIFFERENTIAL HOUSING ONLY- Part Number: C11-00007-217, Serial Number: 742821A0267291, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000 Lbs,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2024
Part NumberC11-00007-217
Stock NumberP-497942
MLS Number14157192
CategoryAxle Housings, Rear
Last Updated2/21/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RS21-4 Rear Axle Assembly for a 2024 Freightliner M2 106

Detroit RS21-4 Rear Axle Assembly for a 2024 Freightliner M2 106

Contact for price
(Used) 2024 Freightliner M2 106, COMPLETE REAR DIFFERENTIAL- Part Number: C11-00007-217, Serial Number: 742821A0267291, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000 Lbs, Hub...
ConditionUsed
Rear End5.56 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2024
Part NumberC11-00007-217
Stock NumberP-497939
MLS Number14157189
CategoryAxle Assemblies, Rear
Last Updated2/21/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RS21-4 Rear Differential for a 2020 Freightliner M2 106

Detroit RS21-4 Rear Differential for a 2020 Freightliner M2 106

Contact for price
(Used) 2020 Freightliner M2 106, DIFFERENTIAL GEARS ONLY- Part Number: C11-00009-160, Serial Number: 742821B0120691, Make: Detroit, Model: RS21-4, Ratio: 5.88, Capacity: 17,500 Lbs, For more...
ConditionUsed
Rear End5.88 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2020
Part NumberC11-00009-160
Stock NumberP-496981
MLS Number14142545
CategoryDifferentials, Rear
Last Updated2/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RS21-4 Rear Axle Housing for a 2020 Freightliner M2 106

Detroit RS21-4 Rear Axle Housing for a 2020 Freightliner M2 106

Contact for price
(Used) 2020 Freightliner M2 106, DIFFERENTIAL HOUSING ONLY- Part Number: C11-00009-160, Serial Number: 742821B0120691, Make: Detroit, Model: RS21-4, Ratio: 5.88, Capacity: 17,500 Lbs,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2020
Part NumberC11-00009-160
Stock NumberP-496980
MLS Number14142544
CategoryAxle Housings, Rear
Last Updated2/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RS21-4 Rear Axle Assembly for a 2020 Freightliner M2 106

Detroit RS21-4 Rear Axle Assembly for a 2020 Freightliner M2 106

Contact for price
(Used) 2020 Freightliner M2 106, COMPLETE REAR DIFFERENTIAL- Part Number: C11-00009-160, Serial Number: 742821B0120691, Make: Detroit, Model: RS21-4, Ratio: 5.88, Capacity: 17,500 Lbs, Hub...
ConditionUsed
Rear End5.88 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2020
Part NumberC11-00009-160
Stock NumberP-496977
MLS Number14142541
CategoryAxle Assemblies, Rear
Last Updated2/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RS21-4 Rear Differential for a 2020 Freightliner M2 106

Detroit RS21-4 Rear Differential for a 2020 Freightliner M2 106

Contact for price
(Used) 2020 Freightliner M2 106, DIFFERENTIAL GEARS ONLY- Part Number: C11-00007-208, Serial Number: 742821B0095274, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000 Lbs, For more...
ConditionUsed
Rear End5.56 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2020
Part NumberC11-00007-208
Stock NumberP-495136
MLS Number14108422
CategoryDifferentials, Rear
Last Updated1/24/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
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CRG Heavy Truck Parts
Detroit RS21-4 Rear Axle Housing for a 2020 Freightliner M2 106

Detroit RS21-4 Rear Axle Housing for a 2020 Freightliner M2 106

Contact for price
(Used) 2020 Freightliner M2 106, DIFFERENTIAL HOUSING ONLY- Part Number: C11-00007-208, Serial Number: 742821B0095274, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000 Lbs,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2020
Part NumberC11-00007-208
Stock NumberP-495134
MLS Number14108419
CategoryAxle Housings, Rear
Last Updated2/9/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RS21-4 Rear Axle Assembly for a 2020 Freightliner M2 106

Detroit RS21-4 Rear Axle Assembly for a 2020 Freightliner M2 106

Contact for price
(Used) 2020 Freightliner M2 106, COMPLETE REAR DIFFERENTIAL- Part Number: C11-00007-208, Serial Number: 742821B0095274, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000 Lbs, Hub...
ConditionUsed
Rear End5.56 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2020
Part NumberC11-00007-208
Stock NumberP-495132
MLS Number14108417
CategoryAxle Assemblies, Rear
Last Updated2/9/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RS21-4 Rear Differential for a 2022 Freightliner M2 106

Detroit RS21-4 Rear Differential for a 2022 Freightliner M2 106

Contact for price
(Used) 2022 Freightliner M2 106, COMPLETE DIFFERENTIAL GEARS ONLY- Part Number: C11-00007-208, Serial Number: 742821B0235160, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000 Lbs,...
ConditionUsed
Rear End5.56 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2022
Part NumberC11-00007-208
Stock NumberP-102287
MLS Number13583952
CategoryDifferentials, Rear
Last Updated5/16/2025
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RS21-4 Rear Axle Housing for a 2022 Freightliner M2 106

Detroit RS21-4 Rear Axle Housing for a 2022 Freightliner M2 106

Contact for price
(Used) 2022 Freightliner M2 106, COMPLETE DIFFERENTIAL HOUSING ONLY- Part Number: C11-00007-208, Serial Number: 742821B0235160, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2022
Part NumberC11-00007-208
Stock NumberP-102286
MLS Number13583951
CategoryAxle Housings, Rear
Last Updated2/9/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
NUMBERCall Seller
Email Seller
Save
CRG Heavy Truck Parts
Detroit RS21-4 Rear Axle Assembly for a 2022 Freightliner M2 106

Detroit RS21-4 Rear Axle Assembly for a 2022 Freightliner M2 106

Contact for price
(Used) 2022 Freightliner M2 106, COMPLETE REAR DIFFERENTIAL- Part Number: C11-00007-208, Serial Number: 742821B0235160, Make: Detroit, Model: RS21-4, Ratio: 5.56, Capacity: 19,000 Lbs, Hub...
ConditionUsed
Rear End5.56 ratio
Fits To Make(s)Freightliner
Fits To Model(s)M2 106
Will Fit Year(s)2022
Part NumberC11-00007-208
Stock NumberP-102285
MLS Number13583949
CategoryAxle Assemblies, Rear
Last Updated2/9/2026
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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