Used Eaton RS404 Axles &amp; Differentials For Sale in United States

Used Eaton RS404 Differential - Ratio: 3.55 - Non-Locker

$395 USD

Used RS404 Differential - Ratio: 3.55 - Non-Locker

Condition	Used
Fits To Make(s)	Eaton
Fits To Model(s)	RS-404
Part Number	509825
Stock Number	700-15519
MLS Number	14619070
Category	Differentials, Unspecified
Last Updated	9/23/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

Used Eaton RS404 Differential - Ratio: 3.90 - Non-Locker

$395 USD

Used RS404 Differential - Ratio: 3.90 - Non-Locker

Condition	Used
Fits To Make(s)	Eaton
Fits To Model(s)	RS-404
Part Number	RS-404
Stock Number	700-15520
MLS Number	14619069
Category	Differentials, Unspecified
Last Updated	9/23/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

Used Eaton RS404 Differential - Ratio: 3.25 - Non-Locker

$395 USD

Used RS404 Differential - Ratio: 3.25 - Non-Locker

Condition	Used
Fits To Make(s)	Eaton
Fits To Model(s)	RS-404
Part Number	RS-404
Stock Number	700-15529
MLS Number	14619066
Category	Differentials, Unspecified
Last Updated	9/23/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

2006 Eaton RS404 Rear Axle Housing

$1,250 USD

Refurbished Eaton Rear Axle Housing, RS404, w/ Torque Rod Bracket, 10 Hole Pilot, 16 Hole Flange, 53.5" Inner Flange To Inner Flange, Air Drum Brakes. P/N 320594, 10046960. Removed From...

Condition	Used
Stock Number	4226-25-REF
MLS Number	14611468
Category	Axle Housings, Rear
Last Updated	9/24/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

2008 Eaton RS404 Rear Differential for a International Prostar

$455 USD

(USED) Eaton RS404 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	International
Fits To Model(s)	PROSTAR
Stock Number	25651667
MLS Number	12881906
Category	Differentials, Rear
Last Updated	9/5/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

Used Eaton RS404 Differential Non-Locker Ratio 3.55

$395 USD

Used RS404 Differential Non-Locker Ratio 3.55

Condition	Used
Fits To Make(s)	Eaton
Fits To Model(s)	RS-404
Part Number	RS-404
Stock Number	700-15531
MLS Number	14582941
Category	Differentials, Unspecified
Last Updated	9/3/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

1999 Eaton RS404 Rear Differential for a Kenworth W900L

$325 USD

(USED) Eaton RS404 Ratio: 3.70 Side Gear Splines: 41 W/ Locker: NO Cast#: 127603

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	W900L
Stock Number	25983371
MLS Number	14357575
Category	Differentials, Rear
Last Updated	8/30/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2012 Eaton RS404 Rear Axle Housing for a Freightliner Cascadia 125

$850 USD

Eaton Rear Axle Housing, RS404, P/N 321354, S/N U111718639, 10 Hole Pilot, Air Drum Brakes. Axle Shafts Removed.

Condition	Used
Fits To Make(s)	FREIGHTLINER
Fits To Model(s)	Cascadia 125
Stock Number	512-2
MLS Number	14305967
Category	Axle Housings, Rear
Last Updated	8/29/2026
Location	Dinuba, CA, US
Sold By	Garabedian Equipment

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Eaton RS404 Rear Differential

$500 USD

Good used Eaton DS404 Rear, Rear Differential Assembly. 3.70 Ratio. 90 day guarantee for swap or refund

Quantity	6
Condition	Used
Rear End	3.70 ratio
Stock Number	Ryd RS404/3.70/41
MLS Number	10295744
Category	Differentials, Rear
Last Updated	8/26/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Used Eaton RS404 Differential Non Locker Ratio 4.11

$395 USD

Used RS404 Differential Non Locker Ratio 4.11

Condition	Used
Fits To Make(s)	Eaton
Fits To Model(s)	RS-404
Part Number	0699231
Stock Number	700-15504
MLS Number	14564459
Category	Differentials, Unspecified
Last Updated	8/26/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

Eaton RS404 Rear Differential

$850 USD

RS404-336 - Refurbished

Condition	Used
Rear End	3.36 ratio
Stock Number	RS404-336-REF
MLS Number	14028787
Category	Differentials, Rear
Last Updated	8/27/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Used Eaton RS404 Differential Non Locker Ratio 4.11

$395 USD

Used RS404 Differential Non Locker Ratio 4.11

Condition	Used
Fits To Make(s)	Eaton
Fits To Model(s)	RS-404
Part Number	RS-404
Stock Number	700-15505
MLS Number	14556409
Category	Differentials, Unspecified
Last Updated	8/21/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

Used Eaton RS404 Differential Non-Locker Ratio 4.88

$395 USD

Used RS404 Differential Non-Locker Ratio 4.88

Condition	Used
Fits To Make(s)	Eaton
Fits To Model(s)	RS-404
Part Number	511335
Stock Number	700-15525
MLS Number	14556406
Category	Differentials, Unspecified
Last Updated	8/21/2026
Location	Dorr, MI, US
Sold By	Frontier Truck Parts

Eaton RS404 Rear Differential for a Unmarked N/A

$500 USD

RS404 - 4.11 Ratio - Pullout - Grade A - Unit In Good Condition. P/N 0595061, (213640)

Condition	Used
Rear End	4.11 ratio
Fits To Make(s)	Unmarked
Fits To Model(s)	N/A
Stock Number	4539412
MLS Number	13893113
Category	Differentials, Rear
Last Updated	8/20/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

2001 Eaton RS404 Rear Axle Housing for a Kenworth T2000

$950 USD

(USED) Eaton RS404 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: AG400 Track Width : 73

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T2000
Stock Number	25655986
MLS Number	12896531
Category	Axle Housings, Rear
Last Updated	8/15/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

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Eaton RS404 Rear Axle Housing for a 1997 Freightliner FLD120

$1,095 USD

GOOD USED REAR HOUSING ASSEMBLY, Serial#: NA, Core Charge: NA, Hub Bolts: 10, Suspension: AIRLINER

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	FLD120
Will Fit Year(s)	1997
Part Number	NA
Stock Number	111124-20
MLS Number	13243138
Category	Axle Housings, Rear
Last Updated	8/14/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

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Eaton RS404 Rear Differential

$800 USD

#5. RS404. Hub to Hub. Ratio: 3.58. Used, Core Charge: 100.00, Ratio: 3.58

Condition	Used
Rear End	3.58 ratio
Stock Number	168894
MLS Number	12214006
Category	Differentials, Rear
Last Updated	8/20/2026
Location	Louisville, KY, US
Sold By	River City Truck Parts

1996 Eaton RS404 Rear Axle Housing for a Volvo VNL

$850 USD

Eaton RS404 Rear Rear Axle Housing

Condition	Used
Fits To Make(s)	VOLVO
Fits To Model(s)	VNL
Stock Number	4521-6
MLS Number	14448107
Category	Axle Housings, Rear
Last Updated	8/5/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Axle Shaft

$150 USD

Eaton DS404/RS404 Axle Shaft, P/N 127438

Condition	Used
Stock Number	27134
MLS Number	13969201
Category	Axle Shafts
Last Updated	8/5/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

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Eaton RS404 Rear Differential for a 2003 Peterbilt 379

$795 USD

RS404 3.55 GOOD INSPECTED TAKEOUT/ 90 DAY WARRANTY EXCHANGE, Axle Spline Count: 41, Serial#: NA, Core Charge: 250.00, Ratio: 3.55

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	379
Will Fit Year(s)	2003
Part Number	RSP40 RSP41 RS404
Stock Number	122124-3
MLS Number	13315630
Category	Differentials, Rear
Last Updated	8/5/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

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Eaton RS404 Rear Differential

$1,550 USD

Weller reman diff. p/n 1415238 Eaton RS404 3.90R, Core Charge: 600.00, Ratio: 3.90

Condition	Used
Rear End	3.90 ratio
Stock Number	172665
MLS Number	14242491
Category	Differentials, Rear
Last Updated	8/20/2026
Location	Louisville, KY, US
Sold By	River City Truck Parts

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Eaton RS404 Rear Axle Housing for a 2005 Freightliner Columbia 120

$1,295 USD

GOOD USED AXLE HOUSING ASSEMBLY/ WILL INSPECT 90 DAY WARRANTY, Serial#: NA, Hub Bolts: 10, Suspension: AIRLINER, Brake Type: DRUM

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	Columbia 120
Will Fit Year(s)	2005
Part Number	NA
Stock Number	90324-17
MLS Number	13092545
Category	Axle Housings, Rear
Last Updated	7/29/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

1997 Eaton RS404 Rear Differential

$500 USD

RS404 - 5.29 Ratio - Pullout - Grade A - Unit In Good Condition.

Condition	Used
Rear End	5.29 ratio
Stock Number	120-30C
MLS Number	13887974
Category	Differentials, Rear
Last Updated	7/24/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

2002 Eaton RD404 Rear Axle Housing for a Kenworth T2000

$950 USD

(USED) Eaton RS404 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: AG400 Track Width : 72

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T2000
Stock Number	25639068
MLS Number	12895086
Category	Axle Housings, Rear
Last Updated	7/24/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.