Originally Posted By: LeakySeals
I recently put Maxlife in an 06 4L60E that specs DexVI. It's all good.
Then I tried using maxlife in the 06 transfer case that specs DexIII-H. That did not go well. The transfer case was shuddering around corners. Doing some research on here many state that Maxlife has changed recently. It's a little thinner viscosity than it used to be, which could explain my experience.
So it's no slam dunk that Maxlife is going to work on your older 4L60E that specs DexIII. Might be fine, might shudder and slip because it's too thin
Some TC's are sensitive to minute differences in viscosity and still specify a Dexron III type ATF of 7.X cSt.
In the GM AutoTrac TC's, the GM Auto Trac II fluid or the Valvoline 855459 Multi-Vehicle Transfer Case Fluid can be used.