I have 4.56 gears in my garage and planned to do it myself.

It doesn't look too bad.

I have the service manual, Yukon has instructions, and there is always YouTube, LOL.

I need to get a few special tools, but ever since I put new 38s on, the added rubber over the worn 38s that were more like 36" has been dragging the truck down.

I hope the gear change will help the transmission shift better.