HO52 / H052 Reconditioned GM Eaton Differential Carrier – 4.57 Ratio | 1949-72 Vintage

HO52 / H052 | GM Eaton Differential Carrier — Reconditioned Original 4.57 OEM Ratio

Reconditioned full-floating GM Eaton HO52 / H052 rear differential carrier with the original factory 4.57 ratio (new gearset). Direct fit for vintage restoration projects on 1949–1972 GM ½-ton and 1-ton trucks (C/K30 series). Completely disassembled, cleaned, inspected — internals in functional condition. New National 411330 input seal installed and all bearings updated to new, high-quality replacements. Reconditioned in-house by Discount Parts Exchange (DPX), Mansfield, Ohio.

Call for pricing & availability: 419-522-3320.

Key Details

• Casting Numbers: Main case 3766686
• Input Seal Retainer: 3766686
• Gear Set: 3785597 (NEW GEARSET)
• Ratio: 4.57:1 – original OEM stock gearing
• Axle Splines: 17-spline axle gears
• Snubber Bolt: No – HO52 does not have one
• Input Seal: New National 411330
• Differential Bearings Right/Left: 388A / 382
• Tail Bearing: MR5205EL
• Pinion Head Bearing: 5310WA
• Condition: Reconditioned — inspected and functional (minor cosmetic marks, no performance impact)

What’s Included

• Reconditioned HO52 / H052 carrier with matched 4.57 gearset (new gearset)
• Spider gears & cross shaft (17-spline axle nest set)
• New National 411330 input seal
• All bearings updated to new, high-quality replacements

Fitment Notes

• Direct replacement for GM ½-ton and 1-ton trucks 1949–1972 with Eaton HO52 / H052 rear axle
• The HO52 / H052 and HO72 / H072 ring and pinion are not interchangeable — HO52 / H052 gearsets like 3785597 do not have a snap ring groove in the pinion for the tail bearing and use different pinion bearings
• Verify casting numbers and spline count before ordering

Warranty

Sold as-is; no warranty expressed or implied. Please confirm fitment prior to purchase. Returns not accepted unless arranged in advance.

Shipping / Location

• Ships from our Mansfield, Ohio warehouse (419-522-3320)
• LTL freight to commercial address or hold at dock for customer pickup

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