Powertrax 1920-LR Lock-Right Differential, GM 8.5" 10 Bolt, 28 Spline

Installed in a 8.5 10 bolt open carrier. Went into a c10 with 5.3 4L60 and 275/60/15s. Install was breeze, just go read Motortrends install write up and it’s smooth. I was able to push the springs in the just my fingers and it went fine. I did install with the ring gear on but out of the truck, but doing it while still in the carrier wouldn’t be an issue either. TIPS FOR C CLIP AXLES—Just be patient, work the axles back and forth while holding clips in and you will eventually get the spacers in to cover the clips. I used a knife in the center, it’s a pain in the a..but keep working with it. I used 2.25ish quarts of 80w90 Lucas, I do have turndowns but I heard the clicking a couple times but nothing bad. If you’re around 10ish percent throttle, you may can take a sharp corner while clicking but it could lock halfway through. Again, not bad, I dig it actually. Second, when you let off the throttle, then get back on it, it may feel a little odd..a shimmy maybe but you don’t even have to touch the wheel. It’s not bad at all. If you’re getting this for the street, I strongly recommend just be sure to understand the trade offs ( chirping sometimes, a clunk or two some, clicking) If it’s chirping in a corner, it’s very easy to just throttle up a bit and it’ll spin on up easier than you think. Just don’t fear a locker, get it! I will update if any issues arise.

Works great and the install was a breeze.

DIY the original gears in a 1981 C10 with the Powertrax 1929LR. The install was super easy. They are very quite and the lock up is excellent!

Easy to install, came with easy to understand instructions. Works very well in my 1983 Chevy K10. Instantly locks under power.

Easy to install and works like a charm! Would recommend it to whoever doesn't want a one wheelie squeally! Thanks

This was installed in my 1970 Chevelle and has less than 1000 miles on it since, but the teeth on the left side axle are rounding off slipping, rendering the car all but undriveable until I replace the whole setup. Would not recommend.

Easy installation workswell

very pleased