Review on Efficient ACDelco GM Original Equipment 10-4058 Versatrak Fluid - 16.9 oz: Enhance and Protect Your Vehicle's Performance by Alex Montgomery

Worked great for changing the liquid on the back of the rendezvous. I ran aft for a few minutes until the moans started. Then I drained the fluid and refilled it. Then I went and played eights for a few minutes until the moaning stopped. Finally, I made sure the liquid was still full by adding an ounce or two. I only used about 3 1/4 bottles for my rear end, but I have enough left over to make my transfer case now. My only complaint is that this liquid is really expensive, but a lot cheaper here at Revain. You can save a few bucks by making your own Versatrak fluid using some recipes you can find online. The $20-30 you can save is nothing compared to a new rear end if your mix isn't working. It works great and I'm glad I spent the extra money.