1. Home
  2. For Sale
  3. Truck Parts
  4. Axles & Differentials
  5. Differentials, Rear
  6. Rockwell
  7. RS21145

Rockwell RS21145 Rear Differentials For Sale

Browse Rockwell RS21145 Rear Differentials on MyLittleSalesman.com and compare listings with prices from $450 to $1,250. Sellers include Camions Lussier-Lussicam and Rydemore Heavy Duty Truck Parts. Filter by condition, price, or year to quickly narrow down to the right Rockwell RS21145 Rear Differential.
Close
Your Current Search
Industry
Truck Parts
Top-Category
Axles & Differentials
Category
Differentials, Rear
Manufacturer
Rockwell
Model
RS21145
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 (52)
Category
   Differentials, Rear (52)
Make
Rockwell (52)
Model
RS21145 (52)
Condition
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 (52)
Market Type
For Sale (52)

Quick Filters

Showing 1 - 25 of 52 Rear Differential Listings

1 - 25 of 52 listings
1 - 25 of 52 listings
Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

$500 USD
Good used Rockwell RS-21-145 rear, rear differential assembly. 5.29 ratio. 90 day guarantee for swap or refund
ConditionUsed
Rear End5.29 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberRyd RS-21-145/5.29/
MLS Number10310485
CategoryDifferentials, Rear
Last Updated3/2/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
(888) 519-___  SHOW
NUMBERCall Seller
Email Seller
Save
Rydemore Heavy Duty Truck Parts
Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

$600 USD
Good used Rockwell RS-21-145 rear, rear differential assembly. 3.58 ratio. 90 day guarantee for swap or refund
ConditionUsed
Rear End3.58 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberRyd RS-21-145/3.58/
MLS Number10568084
CategoryDifferentials, Rear
Last Updated1/15/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
(888) 519-___  SHOW
NUMBERCall Seller
Email Seller
Save
Rydemore Heavy Duty Truck Parts
Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

$600 USD
Good used Rockwell RS-21-145 rear, rear differential assembly. 4.63 ratio. 90 day guarantee for swap or refund
Quantity2
ConditionUsed
Rear End4.63 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberRyd RS-21-145/4.63/
MLS Number11424959
CategoryDifferentials, Rear
Last Updated1/9/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
(888) 519-___  SHOW
NUMBERCall Seller
Email Seller
Save
Rydemore Heavy Duty Truck Parts
Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

$600 USD
Good used Rockwell RS-21-145 rear, rear differential assembly. 5.57 ratio. 90 day guarantee for swap or refund
Quantity2
ConditionUsed
Rear End5.57 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberRyd RS-21-145/5.57/
MLS Number10643517
CategoryDifferentials, Rear
Last Updated1/6/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
(888) 519-___  SHOW
NUMBERCall Seller
Email Seller
Save
Rydemore Heavy Duty Truck Parts
Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

Rockwell RS21145 Rear Differential for a Rockwell RS-21-145

$500 USD
Good used Rockwell RS-21-145 rear, rear differential assembly. 4.88 ratio. 90 day guarantee for swap or refund
ConditionUsed
Rear End4.88 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberRyd RS-21-145/4.88/
MLS Number10643330
CategoryDifferentials, Rear
Last Updated1/1/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
(888) 519-___  SHOW
NUMBERCall Seller
Email Seller
Save
Rydemore Heavy Duty 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
Got a rear differential to sell? In minutes, you can create an online listing for your rear differential and advertise it to thousands of buyers.
Start selling today