Alliance R21-4N Rear Differentials For Sale

Browse Alliance R21-4N Rear Differentials on MyLittleSalesman.com and compare listings with prices from $750 to $1,895. Sellers include Tim Jordan's Truck Parts and Rydemore Heavy Duty Truck Parts. Filter by condition, price, or year to quickly narrow down to the right Alliance R21-4N Rear Differential.

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Truck Parts

Top-Category
Axles & Differentials

Category
Differentials, Rear

Manufacturer
Alliance

Model
R21-4N

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1 - 5 of 5 listings

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

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.

(833) 359-___ SHOW
NUMBERCall Seller

Tim Jordan's Truck Parts Inc.

Alliance R21-4N Rear Differential

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

(888) 519-___ SHOW
NUMBERCall Seller

Rydemore Heavy Duty Truck Parts

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

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.

(833) 359-___ SHOW
NUMBERCall Seller

Tim Jordan's Truck Parts Inc.

Alliance R21-4N Rear Differential

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

(888) 519-___ SHOW
NUMBERCall Seller

Rydemore Heavy Duty Truck Parts

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

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

$1,895 USD

USED ALLIANCE R21-4N SINGLE AXLE DIFFERENTIAL ASSEMBLY WITH LOCKER - RATIO: 6.14

Condition	Used
Rear End	6.14 ratio
Fits To Make(s)	FREIGHTLINER
Fits To Model(s)	M2 106
Stock Number	89950
MLS Number	12834961
Category	Differentials, Rear
Last Updated	10/8/2025
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

(833) 359-___ SHOW
NUMBERCall Seller

Tim Jordan's Truck Parts Inc.

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