USA Standard Gear Spartan Locker for GM 12T & 12P, 30 Spline, Includes Heavy-Duty Cross pin Shaft

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.

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

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.

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.