Drivetrain› Differentials and Rear-End Components

Eaton

Eaton Posi Differential 28 Spline 1.20in Axle Shaft Diameter 2.73 & Up Ratio Front/Rear 8.5in

$750.99

SKU: E00K 19557-010

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

This Eaton 19557-010 Posi differential is designed for General Motors 8.5-inch 10-bolt rear axles. It features 28 splines and is compatible with gear ratios of 2.73 and numerically higher. This limited-slip differential enhances traction and performance, suitable for various applications. Special bearings are required, with different part numbers depending on whether the axle has small bearing bores (typically pre-1999 vehicles) or large bearing bores (typically 1999-2013 vehicles).

Fitment

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Specifications

BrandEaton
Part NumberE00K 19557-010

Videos

GM 10 Bolt 8.5" Posi Install "How To" Chevy C10 Truck - Eaton Truetrac

GM 10 Bolt 8.5" Posi Install "How To" Chevy C10 Truck - Eaton Truetrac

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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