Eaton GM 8.5 Inch/8.6 Inch 10 Bolt 30 Spline Limited Slip - 19559-010

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  • Eaton | Part Number: EAT19559-010
  • Popular Axle Manufacture:GM
  • Axle Location:Front|Rear
  • Axle Type:GM 10 Bolt 8.6 Inches|GM 10 Bolt 8.5 Inches
  • Fitment:Universal Fit
  • Axle Spline:30 Splines
  • Differential Type:Limited Slip Assembly


The Eaton Posi is one of the top performers when it comes to streetable performance form a limited slip differential. The Eaton Posi uses preload Springs with Carbon Fiber clutches and is rebuildable.

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Question & Answers

7 Answered questions

Q: will this work with my 2005 Chevy Trailblazer LS 2WD with 3.42 axle ratio? Answer this question

A: Hello John They use 2 different axles in the Trailblazer's the 8.5/8.6 and the 8 inch. If yours has the 8.6 yes it will work. If you have the 8 inch we have the Eaton also part number EAT912A654 Thanks

Answered by Rody on 06/21/2015

Q: Have 2004 gmc sierra 1500 2 wheel drive with 3.73 gears 10 bolt the g80 locker went bad and killed spider gears is this good replacement Answer this question

A: Hello This is a good unit for the 10 bolt the one that is a stronger replacement is the Eaton / Detroit True Trac part number EAT 913a481 here is a link. Thanks

Answered by Rody on 03/18/2015

Q: I have a 68 camaro w 10 bolt rear end differential, posi traction unit with bad carrier, w 3.10 ratio, 8.5 in ring gear, 30 spline non c-clip axles, will the eaton 19559-010 limited slip carrier work in this Axle housing? Answer this question

A: Hello All of the Chevy 10 bolt rear axles had C-Clips so there has been some work done to yours. The 68 Camaro would of had an 8.2 10 bolt with 28 spline axles. So yours being an 8.5 with 30 spline it has to be an updated custom axle. The unit you asked will work with or without C-Clip axles.

Answered by Rody on 12/07/2014

Q: 2007 gmc 1500 4x4 stock. Unsure of gearing. But the eaton g80 went bad, broken spider gears. Will this be a good replacement. This truck is all stock and does not haul anything. Used just for daily driving. Thanks for your help. Answer this question

A: Hello That is a good strong unit for your truck but I like the Eaton True Trac better. It is a great unit off-road and on road. It is all gear driven and has a higher torque bias. It also runs a billet steel case instead of cast. Here is the part number if you want to look at it EAT 913A481 and install kit G/2 35-2022.

Answered by Rody on 06/28/2014

Q: Will this product fit in a 2011 Silverado 1500 rear end? Answer this question

A: Hi Arnettii This Eaton limited slip will fit your 2011 GM 10 bolt rear axle. please verify that your axle has 10 differential cover bolts and not 14. Thank You

Answered by Stevie on 05/28/2014


The Eaton Corporation has enjoyed over a century of innovation and is in the business of powering Jeeps with a top-rate lineup of lockers, open differentials and limited slips. Traction performance is critical while jeeping and we carry Eaton components for upgrading vehicle traction. Compatible with different axle splines and various gears, these parts are often rebuildable and are top performers on and off-road. Eaton's rich tradition of engineering innovative, dependable products extends to off-road parts and accessories for 4x4s and they have evolved to become the industry standard in differentials, lockers and limited slips. Shop Eaton Now