Eaton S21-170 Rear Differentials For Sale

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Industry
Truck Parts

Top-Category
Axles & Differentials

Category
Differentials, Rear

Manufacturer
Eaton

Model
S21-170

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1 - 2 of 2 listings

Eaton S21-170 Rear Differential for a Peterbilt 337

2011 Eaton S21-170 Rear Differential for a Peterbilt 337

$1,816 USD

(USED) Eaton S21-170 Ratio: 5.38 Side Gear Splines: 46 W/ Locker: NO Cast#: Could Not Verify

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	337
Stock Number	25635655
MLS Number	12800679
Category	Differentials, Rear
Last Updated	5/14/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

(855) 370-___ SHOW
NUMBERCall Seller

Vander Haag's Inc.

Eaton S21-170 Rear Differential for a Peterbilt 384

2008 Eaton S21-170 Rear Differential for a Peterbilt 384

$1,816 USD

(USED) Eaton S21-170 Ratio: 3.73 Side Gear Splines: 46 W/ Locker: NO Cast#: RUSTED Ref# 512508

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	384
Part Number	512508
Stock Number	25727848
MLS Number	13283723
Category	Differentials, Rear
Last Updated	5/14/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

(855) 370-___ SHOW
NUMBERCall Seller

Vander Haag's Inc.

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