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Eaton Posi Performance Differentials 19689-010

Differential, Posi Performance, Limited Slip, 30-Spline, GM, 10.5 in., Each

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  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

Brand: EATON

Manufacturer's Part Number: 19689-010

Part Type: Differential Carriers

Product Line: Eaton Posi Performance Differentials

Summit Racing Part Number: ETN-19689-010

Aftermarket Carrier Style: Clutch-type

Cover Bolts: 14

Axle Shaft Spline Quantity: 30

Manufacturer of Axle: GM

Carrier Material: Steel

Carrier Bearings Included: No

Quantity: Sold individually.

Notes: Designed for 4.10 and numerically lower gear ratios.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

Big torque doesn't have to mean big traction problems. Eaton Posi Performance differentials combine carbon friction discs with precision-forged gears to give you great traction, even under higher torque loads. Plus, the carbon friction discs produce smooth, quiet performance for the life of your vehicle.


Questions & Answers Ask a Product Question

Will a 3.90 Ring Gear fit on this ?

Asked by WILLIAM T on November 22, 2018


Yes that carrier fits 4.10 and down gears.

EATON EATON Answer - December 03, 2018

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Can this except a 39 tooth Ring Gear from a 1964 Eaton Ho72 10Bolt Full Floater and is this for 3/4 ton application ?

Asked by WILLIAM T on November 20, 2018


I am sorry but no it cannot. This carrier is not made to fit a HO72 and the only thing that I know you can do is if you have a open non-posi carrier you can put in a 225S-10 and get custom axles to fit the side gear axle splines.

EATON EATON Answer - November 21, 2018

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14 bolt 10.5 gm rear.
Changing to 5.38 thick ratio and need to know if this is the correct limited slip

Asked by GADDY MOUN on January 29, 2018


Thank you for your question. The EATON 19689-010 differential carrier fits factory 4.11:1 and numerically lower ratio. If you have a thick gear designed to work with this carrier such as G2 Axle & Gear part number 2-20232-538X, it will work for your application. However, it is not compatible with gearsets designed for 4.56:1 and numerically higher carrier.

Summit RacingSummit Racing Answer - February 22, 2018

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Will this fully take care of my "one wheel wonder" on my chevy 3.73 rear end, as in lock down both before spinning?

Asked by BEN on December 17, 2017


Thank you for your question. EATON 19689-010 is a limited slip differential, which would allow minimal slippage of the two opposite wheels. Please call for specific fitment and compatibility with your specific application.

Summit RacingSummit Racing Answer - December 28, 2017

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Most Helpful Reviews Review This Product

1 Customer Reviews for EATON 19689-010 - Eaton Posi Performance Differentials

Average Customer Review

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Awesome As Expected

Summit RacingSummit Racing Verified Purchase

What can I say? It's an Eaton Posi-traction unit. It is just as pictured which leaves me to believe it has conical clutches in it. Got me hooked up in my street rod truck. Functions like they have for the last 60 or so years.

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Reviewer: from CA

Date: July 27, 2018

Ease of Installation

Some parts are not legal for use in California or other states with similar laws / regulations

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