1. Home
  2. Listings
  3. Truck Parts
  4. Differentials, Rear
  5. Rockwell
  6. RS21145

Rockwell RS21145 Rear Differentials For Sale

Close
Your Current Search
Industry
Truck Parts
Category
Differentials, Rear
Manufacturer
Rockwell
Model
RS21145
Market Type
For Sale
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 (26)
Category
Differentials, Rear (26)
Make
Rockwell (26)
Model
RS21145 (26)
Condition
Model Year
-
Horsepower
-
Inspection Report
Yes (0)
Warranty
Yes (0)
No (0)
Price
-
Country
United States (26)
State / Region
Select a state below and click Refine Results.



Seller Type
Dealerships (26)
Market Type
For Sale (26)

Quick Filters

Showing 1 - 25 of 26 Rear Differential Listings

1 - 25 of 26 listings
1 - 25 of 26 listings
Rockwell RS21145 Rear Differential for a Rockwell RS-21-145
1 0

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

$600 USD
Good used Rockwell RS-21-145 rear, rear differential assembly. 4.11 ratio. 90 day guarantee for swap or refund
Quantity2
ConditionUsed
Rear End4.11 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberRyd RS-21-145/4.11/
MLS Number10524900
CategoryDifferentials, Rear
Last Updated7/30/2025
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
1 0

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

$600 USD
Good used Rockwell RS-21-145 rear, rear differential assembly. 5.29 ratio. 90 day guarantee for swap or refund
Quantity2
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 Updated7/30/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 6.43 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
ConditionRemanufactured
Rear End6.43 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/6.
MLS Number14050719
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 5.13 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
ConditionRemanufactured
Rear End5.13 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/5.
MLS Number14050670
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 3.73 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
Quantity4
ConditionRemanufactured
Rear End3.73 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/3.
MLS Number14050658
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly, 6.14 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
Quantity2
ConditionRemanufactured
Rear End6.14 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/6.
MLS Number14050642
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 3.07 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
ConditionRemanufactured
Rear End3.07 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/3.
MLS Number14050623
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 4.56 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
Quantity2
ConditionRemanufactured
Rear End4.56 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/4.
MLS Number14050578
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 new style rear, rear differential assembly. 4.10 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
ConditionRemanufactured
Rear End4.10 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/4.
MLS Number14050556
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell rear, rear differential assembly. 4.88 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
ConditionRemanufactured
Rear End4.88 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/4.
MLS Number14050518
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 3.91 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
ConditionRemanufactured
Rear End3.91 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/3.
MLS Number14050457
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 2.79 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
Quantity2
ConditionRemanufactured
Rear End2.79 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/2.
MLS Number14050448
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS21-145 rear, rear differential assembly. 4.10 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
Quantity3
ConditionRemanufactured
Rear End4.10 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/4.
MLS Number14050430
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 7.17 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
Quantity3
ConditionRemanufactured
Rear End7.17 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/7.
MLS Number14050391
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS21-145 rear, rear differential assembly. 3.42 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
Quantity4
ConditionRemanufactured
Rear End3.42 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/3.
MLS Number14050378
CategoryDifferentials, Rear
Last Updated12/18/2025
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
0 0

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

Newly Listed
$1,000 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 3.58 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
Quantity6
ConditionRemanufactured
Rear End3.58 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberBP TRS RS-21-145/3.
MLS Number14050362
CategoryDifferentials, Rear
Last Updated12/18/2025
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