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

Okay for that rear Montana growl: you need to change the oil and then, say, drive 60 miles (let's just get your normal driving level up to 60). Now change the fluid again and drive another 60. Then change the oil for the last time. Now I know this suggestion might sound like one of those things everyone talks about: balancing tires or switching to this brand, but it worked for me. My van went from a loud, constant howl to something quieter or different with each change, to normal.

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…

Factory Oil at "cheap” prices, what better! I've read a number of reviews stating that the new oil eliminates the groaning in the Versatrak's rear differential. My experience is that you can do eighths to get rid of the noise with the oil in the diff now. Just as a test I drove the eight for about 20 minutes to calm the rear end, then changed the fluid (due to a regular service rotation) and drove the car. There was still noise, but now it only took about 10 minutes to get rid of the noise. I'm