R172D557 | Dana Spicer Eaton Differential S23-172D-R5.57 | New Take-Out | 10049265

R172D557 | Dana Spicer S23-172D Differential — 5.57 Ratio — New Take-Out

The R172D557 is a genuine Dana Spicer S23-172D differential head assembly set to a 5.57 ratio. This is a **new take-out** unit from dealer/OEM inventory with delivery miles only. It was professionally disassembled, inspected, and reassembled in our rebuild shop for quality assurance. Built with genuine Dana components and available from Discount Parts Exchange - DPX in Mansfield, Ohio.

Call DPX to confirm: 419-522-3320.

Quick Specs

• Model: S23-172D
• Ratio: 5.57
• Axle Shaft Splines: 46
• Ring Gear OD: 17.476 in
• Gear Set Number: 504424
• Tooth Count: 39 (ring) / 7 (pinion)
• Axle Gears: 10020053 — 46 spline
• Build Status: New take-out; inspected & reassembled in-house
• Applications: Heavy-duty drive axle (line-haul & vocational)

Model & Gear Data

Cross-References

• Drive Axle Assembly #: 7169441
• Customer Part # (Navistar): 3781106C91
• Alternate Part Numbers: R172D557CF (Core Free), R172D557EX (Exchange), DSS172D557EX (Navistar)

Fitment Notes

• For axle configurations requiring a 5.57 ratio
• New take-out from dealer inventory — no road use beyond delivery
• Verified in our shop; disassembled, inspected, and quality-checked

Lubricant Spec & Approvals

Recommendation: Spicer FE 75W-90 synthetic gear lubricant (or equivalent).

Approvals/Specs: Dana SHAES 256 Rev E; Dana SHAES 429; API GL-5; API MT-1; SAE J2360 / MIL-PRF-2105E; Detroit DFS93K219.01; Mack GO-J Plus; Meritor O76-N; Navistar MPAPS B-6821.

What’s Included

• (1) Dana Spicer S23-172D differential head assembly — R172D557

Core / Warranty

• Core: New take-out listing (typically core-free). Exchange option available — ask for details.
• Warranty: Sold as-is, no warranty expressed or implied.

Shipping

• Ships via LTL motor freight to verified commercial addresses only
• No residential delivery — forklift or dock required at delivery

Image Disclaimer

Photos show the actual product or a representative example. Minor handling marks may be present due to storage or inspection.

Call to Order

Call Discount Parts Exchange - DPX for price and availability: 419-522-3320

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DPX — Ohio’s Premier Heavy-Duty Drivetrain Rebuilder | Built to Perform. Trusted to Last.