Drivetrain› Differentials and Rear-End Components

Eaton

Eaton EATON POSI GM 8.875 - 3.08-3.90 Q19554-010

$750.99

SKU: E00K Q19554-010

In Stock
In Stock
Ships by Jun 15
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Eaton Posi Differential is a limited-slip differential designed for GM 8.875 inch axles with 30 splines and gear ratios between 3.08 and 3.90. It is suitable for on-road drag racing, street and muscle cars, light trail/sand sports, restoration projects, and work truck/towing applications. It features 30 splines and is compatible with gear ratios from 3.08 to 3.90. A quality, petroleum-mineral based, GL5 rated 80w-90 gear oil should be used, with a four-ounce bottle of friction modifier added for optimum performance (if not already included in the gear oil).

Fitment

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Specifications

BrandEaton
Part NumberE00K Q19554-010

Videos

PosiTraction Differential Install in a GM 12 Bolt for a 1966 Chevelle

PosiTraction Differential Install in a GM 12 Bolt for a 1966 Chevelle
Rebuilding your 12 bolt eaton posi. How to.

Rebuilding your 12 bolt eaton posi. How to.

Buy with Confidence

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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