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Rydemore Heavy Duty Truck Parts Rockwell RS21145 Axles & Differentials For Sale

Rydemore Heavy Duty Truck Parts
88 Benson St.
Fitchburg, MA 01420
United States
(888) 519-8914
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Axles & Differentials (22)
   Differentials, Rear (22)
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Rockwell (22)
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RS21145 (22)
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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
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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
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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
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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
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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
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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. 4.11 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 Updated1/1/2026
Location
Fitchburg, MA, US
Sold By
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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. 5.86 ratio. 90 day guarantee for swap or refund
ConditionUsed
Rear End5.86 ratio
Fits To Make(s)ROCKWELL
Fits To Model(s)RS-21-145
Stock NumberRyd RS-21-145/5.86/
MLS Number11121773
CategoryDifferentials, Rear
Last Updated7/30/2025
Location
Fitchburg, MA, US
Sold By
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Stock NumberBP TRS RS-21-145/5.
MLS Number14050670
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Quantity2
ConditionRemanufactured
Rear End3.73 ratio
Stock NumberBP TRS RS-21-145/3.
MLS Number14050658
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
ConditionRemanufactured
Rear End6.14 ratio
Stock NumberBP TRS RS-21-145/6.
MLS Number14050642
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Stock NumberBP TRS RS-21-145/3.
MLS Number14050623
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Stock NumberBP TRS RS-21-145/4.
MLS Number14050578
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Stock NumberBP TRS RS-21-145/4.
MLS Number14050556
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Stock NumberBP TRS RS-21-145/3.
MLS Number14050457
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Stock NumberBP TRS RS-21-145/2.
MLS Number14050448
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Quantity2
ConditionRemanufactured
Rear End4.10 ratio
Stock NumberBP TRS RS-21-145/4.
MLS Number14050430
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Stock NumberBP TRS RS-21-145/7.
MLS Number14050391
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Quantity3
ConditionRemanufactured
Rear End3.42 ratio
Stock NumberBP TRS RS-21-145/3.
MLS Number14050378
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 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
Quantity4
ConditionRemanufactured
Rear End3.58 ratio
Stock NumberBP TRS RS-21-145/3.
MLS Number14050362
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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NUMBERCall Seller
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Rydemore Heavy Duty Truck Parts
Rockwell RS21145 Rear Differential

Rockwell RS21145 Rear Differential

$1,200 USD
Remanufactured Rockwell RS-21-145 rear, rear differential assembly. 5.57 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered
ConditionRemanufactured
Rear End5.57 ratio
Stock NumberBP TRS RS-21-145/5.
MLS Number14050338
CategoryDifferentials, Rear
Last Updated8/26/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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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

$1,200 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 Updated3/2/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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NUMBERCall Seller
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Rydemore Heavy Duty Truck Parts
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