Alliance R21-4N Axles &amp; Differentials For Sale

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2024 Alliance R21-4N Rear Axle Housing

$1,750 USD

RS-21.0-4 BY DIFF TAG, WITH 10 HUB PILOT WHEELS, AIR ABS

Condition	Used
Fits To Make(s)	ALLIANCE
Fits To Model(s)	R21-4N
Stock Number	2570029
MLS Number	13915749
Category	Axle Housings, Rear
Last Updated	5/15/2026
Location	Toledo, OH, US
Sold By	LKQ Heavy Truck

(855) 300-___ SHOW
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2012 Reconditioned Alliance R21-4N Spring Axle Housing

$1,995 USD

Reconditioned R21-4N Spring Axle Housing, Position: Rear

Condition	Remanufactured
Fits To Make(s)	Alliance
Fits To Model(s)	ARS210-4
Will Fit Year(s)	2012
Part Number	6813504730
Stock Number	300-27103
MLS Number	14257608
Category	Axle Housings
Last Updated	3/21/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

(833) 359-___ SHOW
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2014 Alliance R21-4N Rear Differential for a Freightliner M2 106

$1,795 USD

USED ALLIANCE R21-4N REAR REAR DIFFERENTIAL, RATIO 5.22. THE PRICE IS FOR THE DIFFERENTIAL ONLY BUT WE HAVE HOUSINGS AVAILABLE IF NEEDED.

Condition	Used
Rear End	5.22 ratio
Fits To Make(s)	FREIGHTLINER
Fits To Model(s)	M2 106
Stock Number	96614
MLS Number	13085256
Category	Differentials, Rear
Last Updated	1/6/2026
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

(888) 519-___ SHOW
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Alliance R21-4N Rear Differential

$750 USD

Good used Alliance R21-4N Rear, rear Differential Assembly. 6.14 Ratio. 90 day guarantee for swap or refund

Condition	Used
Rear End	6.14 ratio
Fits To Make(s)	ALLIANCE
Fits To Model(s)	R21-4N
Stock Number	Ryd R21-4N/6.14/46
MLS Number	13363031
Category	Differentials, Rear
Last Updated	1/1/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

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2015 Alliance R21-4N Rear Differential for a Freightliner M2 106

Contact for price

USED ALLIANCE R21-4N SINGLE REAR DIFFERENTIAL/5.88 RATIO/HYD BRAKES

Condition	Used
Rear End	5.88 ratio
Fits To Make(s)	FREIGHTLINER
Fits To Model(s)	M2 106
Stock Number	90787
MLS Number	12835563
Category	Differentials, Rear
Last Updated	9/30/2025
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

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2023 NTO Alliance R21-4N take out axle assembly

$3,605 USD

NTO R21-4N take out axle assembly, Position: Rear

Condition	New
Will Fit Year(s)	2023
Part Number	681530406
Stock Number	317-10245
MLS Number	13628170
Category	Axle Assemblies, Rear
Last Updated	1/24/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

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Alliance R21-4N Rear Differential

$1,200 USD

Remanufactured Alliance R21-4N rear, rear differential assembly. 4.77 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Condition	Remanufactured
Rear End	4.77 ratio
Fits To Make(s)	ALLIANCE
Fits To Model(s)	R21-4N
Stock Number	BP TRS R21-4N/4.77
MLS Number	14050459
Category	Differentials, Rear
Last Updated	12/18/2025
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts