Eaton RDP40 Axles &amp; Differentials For Sale

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Eaton RDP40 Rear Differential for a 2017 Peterbilt 348

$1,495 USD

GOOD INSPECTED DIFFERENTIAL ASSEMBLY/ LOCKER 90 DAY WARRANTY EXCHANGE, Axle Spline Count: 41, Core Charge: 500.00, Ratio: 5.29, Casting#: NA

Condition	Used
Rear End	5.29 ratio
Fits To Make(s)	Peterbilt
Fits To Model(s)	348
Will Fit Year(s)	2017
Part Number	RDP41 LOCKER
Stock Number	22526-4
MLS Number	14219569
Category	Differentials, Rear
Last Updated	6/13/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

2009 Eaton RDP40 Rear Differential for a Kenworth T370

$1,534 USD

(USED) Eaton RDP40 Ratio: 6.17 Side Gear Splines: 41 W/ Locker: YES Cast#: -

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T370
Stock Number	25768127
MLS Number	13449827
Category	Differentials, Rear
Last Updated	5/1/2025
Location	Des Moines, IA, US
Sold By	Vander Haag's Inc.

(833) 359-___ SHOW
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2022 Eaton RDP40 Rear Differential for a Peterbilt 567

Newly Listed

Contact for price

USED EATON RDP40 REAR DIFFERENTIAL RATIO: 3.36 WITH LOCKER

Condition	Used
Rear End	3.36 ratio
Fits To Make(s)	PETERBILT
Fits To Model(s)	567
Stock Number	100128
MLS Number	14447100
Category	Differentials, Rear
Last Updated	6/24/2026
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

2011 Eaton RDP40 Rear Differential for a Peterbilt 388

$1,534 USD

(USED) Eaton RDP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: YES Cast#: NF 1 DI

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	388
Stock Number	26014642
MLS Number	14423995
Category	Differentials, Rear
Last Updated	6/19/2026
Location	Des Moines, IA, US
Sold By	Vander Haag's Inc.

2011 Eaton RDP40 Rear Axle Housing for a Peterbilt 388

$850 USD

(USED) Eaton RDP40 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: PETE FLEX AIR Track Width : Verify

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	388
Stock Number	26014644
MLS Number	14429310
Category	Axle Housings, Rear
Last Updated	6/14/2026
Location	Des Moines, IA, US
Sold By	Vander Haag's Inc.

2013 Eaton RDP40 Rear Differential for a Kenworth T660

$1,534 USD

(USED) Eaton RDP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: YES Cast#: - BAD YOKE

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T660
Stock Number	26012780
MLS Number	14419006
Category	Differentials, Rear
Last Updated	6/14/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2014 Eaton RDP40 Rear Differential for a Peterbilt 388

$1,534 USD

(USED) Eaton RDP40 Ratio: 3.42 Side Gear Splines: 41 W/ Locker: YES Cast#: NFQDQ11F3

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	388
Stock Number	26001612
MLS Number	14388716
Category	Differentials, Rear
Last Updated	5/24/2026
Location	Des Moines, IA, US
Sold By	Vander Haag's Inc.

2014 Eaton RDP40 Rear Axle Housing for a Peterbilt 388

$700 USD

(USED) Eaton RDP40 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: PETE FLEX AIR Track Width : 72 SHOWS RUST

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	388
Stock Number	26001641
MLS Number	14388708
Category	Axle Housings, Rear
Last Updated	5/24/2026
Location	Des Moines, IA, US
Sold By	Vander Haag's Inc.

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Eaton RDP40 Rear Differential

$2,195 USD

REBUILT RDP40 3.90. 12 MONTH PARTS AND LABOR WARRANTY. EXTENDED WARRANTY AVAILABLE, Axle Spline Count: 41, Serial#: 14769, Core Charge: EXCHANGE CRITICAL CORE, Ratio: 3.90

Condition	Remanufactured
Part Number	14769
Stock Number	14769
MLS Number	13583735
Category	Differentials, Rear
Last Updated	6/13/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

(855) 980-___ SHOW
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Eaton RDP40 Rear Differential

Contact for price

GOOD SHAPE, Ratio: 336

Condition	Used
Rear End	3.36 ratio
Stock Number	976125
MLS Number	13759114
Category	Differentials, Rear
Last Updated	5/14/2026
Location	Farr West, UT, US
Sold By	Rocky Mountain Truck Parts

2016 Eaton RDP40 Rear Differential for a Kenworth T880

$1,534 USD

(USED) Eaton RDP40 Ratio: 3.90 Side Gear Splines: 41 W/ Locker: YES Cast#: 127600 Ref# N/A

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T880
Part Number	N/A
Stock Number	25867869
MLS Number	13842843
Category	Differentials, Rear
Last Updated	4/3/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

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Eaton RDP40 Rear Differential

$1,700 USD

Remanufactured Eaton RDP40 locking rear, rear differential assembly. 5.57 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Condition	Remanufactured
Rear End	5.57 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RDP40
Stock Number	BP TRS RDP40/5.57
MLS Number	14050357
Category	Differentials, Rear
Last Updated	3/2/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

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Eaton RDP40 Rear Differential

$1,500 USD

Remanufactured Eaton RDP40 locking rear, rear differential assembly. 3.90 ratio. 41 Spline. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered.

Condition	Remanufactured
Rear End	3.90 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RDP40
Stock Number	Ryd RDP40/3.90/41L
MLS Number	14127175
Category	Differentials, Rear
Last Updated	2/5/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

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Eaton RDP40 Rear Differential

$1,250 USD

Remanufactured Eaton RDP40 rear, rear differential assembly. 5.29 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Condition	Remanufactured
Rear End	5.29 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RDP40
Stock Number	BP TRS RDP40/5.26
MLS Number	14050756
Category	Differentials, Rear
Last Updated	12/18/2025
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

2011 Eaton RDP40 Rear Differential for a Peterbilt 384

$1,534 USD

(USED) Eaton RDP40 Ratio: 4.33 Side Gear Splines: 41 W/ Locker: YES Cast#: CANNOT VERIFY

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	384
Stock Number	25864930
MLS Number	13822133
Category	Differentials, Rear
Last Updated	9/19/2025
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

2014 Eaton RDP40 Rear Differential for a Kenworth T680

$1,534 USD

(USED) Eaton RDP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: YES

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T680
Stock Number	25758161
MLS Number	13442012
Category	Differentials, Rear
Last Updated	3/12/2025
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.