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Truck and Jeep Parts Home » Drivetrain & Differentials » Differentials » GM 8.5in./8.6in. 10 Bolt 30 Spline Automatic Locker

GM 8.5in./8.6in. 10 Bolt 30 Spline Automatic Locker

Detroit Locker | Part Number: EAT187C148A
  • Technical Details

    • For Use With 30 Spline Axles
    • For Use With 2.73 And Up Gears
    • Will Fit 8.6in. With use of G/2 35-2021L Master Kit
    • Automatic Locking
    • Legendary Traction
    • Unmatched Durability
    • 1998 and earlier with bearing bore of 2.89 inch require bearing LM102949 and LM102911

The Detroit Locker maximizes traction by delivering 100% of the torque to both drive wheels. It is engineered to keep both wheels in a constant drive mode, and has the ability to automatically allow wheel speed differentiation when required. No other performance differential has the reputation for delivering traction in mud, snow, rocks and on the track.

Installation instructions are in PDF format. You will need Adobe Reader to view these files.
Download Instructions

Axle LocationAxle LocationAxle TypeAxle TypePopular Axle ManufactureDifferential TypeAxle Spline
FrontRearGM 10 Bolt 8.5in.GM 10 Bolt 8.6in.GMAutomatic Locker30

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Customer Reviews

Average Customer Review


by PowerReviews
Detroit LockerGM 8.5in./8.6in. 10 Bolt 30 Spline Automatic Locker

(based on 1 review)

Reviewed by 1 customer

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Great Traction

By Steve-o

from Jacksonville, FL


  • Durable
  • Off Road Traction


  • Tricky On Pavement

Best Uses

  • Off Road

Comments about Detroit Locker GM 8.5in./8.6in. 10 Bolt 30 Spline Automatic Locker:

I bought this because of it's reputation. I've heard nothing but good things for years. So far, it's performing as advertised. However, you have to pay attention on pavement. Especially wet pavement. I've had no problems, but you can't give it too much gas while turning. Easy to get used to though.

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