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

R172D557 Differential — Dana Spicer S23-172D (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 for reliable commercial service.

Quick Specs

Model: S23-172D  |  Ratio: 5.57  |  Axle Shaft Splines: 46  |  Ring Gear OD: 17.476 in  |  Weight: 465 lb

Key Specs & Features

• Dana/Eaton Part Number: R172D557
• Gear Set Number: 504424
• Tooth Count: 39 (ring) / 7 (pinion)
• Axle Gears: 10020053 — 46 spline
• Build Status: New take-out; inspected & reassembled in-house
• Use Case: Heavy-duty drive axle applications (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.

Typical properties: SAE 75W-90; KV100 15.0 cSt; KV40 103 cSt; VI 152; Brookfield −40 °C ≈ 90,000 cP; Pour Point < −45 °C; Flash Point ≈ 215 °C.

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 Policy

• 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.

Location & Contact

Location: Ohio warehouse
Call for price & availability: 419-522-3320

Heavy-Duty Solutions — Built to Perform. Trusted to Last.