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Your cart is empty.Spartan Locker for GM 12T & 12P, 30 spline, includes heavy-duty cross pin shaft. The Spartan Locker is a lunchbox locker that delivers reliable, 100% lockup traction at a low cost. It's design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap!
Andrew myers
Reviewed in the United States on April 20, 2024
Pain in the butt to install but works good.
Winkz
Reviewed in the United States on June 19, 2022
As mentioned in other reviews, the install instructions need help!In the end, it does what it's supposed to do. After the first two or three times unlocking it is significantly more quiet. The first time will make you think you broke something! No longer noticeable on pavement.Install would be easier on a bench, though I was able to complete with the rear end still in the truck.
Beau
Reviewed in the United States on October 29, 2022
Must have patience to install. It took several trys to line everything up for the c-clips. Product seems very solid once installed. Pops sometimes
Robbie g.
Reviewed in the United States on September 15, 2021
No instructions, no sticker, and worse part is it dosent have the machined notch as shown on the online installation video for C-clip style axles making it impossible to reinstall the C-clips and new retainers. I now have a $300 piece of scrap.
Neil V
Reviewed in the United States on July 1, 2021
Couldn't be happier. Does a great job in my 12 bolt rear end. I used a thick gear oil and I never hear it ratcheting. It also does fine in parking lots with sharp turns. I have it in a 1967 c10. Worth the buy
Customer
Reviewed in the United States on December 28, 2019
Works amazing on my k5 with 33's wouldn't recommend for a daily as slow parking lot turns sound crunchy and pops. It survived Drummond island and accomplished more in 2WD then it would in 4x4 before putting this locker in.
chris
Reviewed in the United States on November 17, 2019
Great product. Installed into c10 12 bolt with 373 gears Install took as long as stated 4 hours and and has held up great. Tire wear has evened out and can lay stripes anywhere. Locks when needed. primarily used on the street. Truck is loud but sometimes i get some random pops and slips when u stop sometimes the splines are not lined up so upon acceleration or forward to reverse.
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