There have been several threads on here with members using Valvoline MaxLife in their ZF 8 speeds, and IIRC, all had great results.
You can get 1 gallon of MaxLife for about the same price as 1 quart the Mopar OE fluid, so definately a good value.
That said, if I had a warranty of any kind, I would be inclined to use only OE fluid and parts, so as to keep the warranty in effect. Pretty sure warranty would be voided once the red MaxLife fluid is seen, even though it seems to meet the spec of the ZF fluid.
One member in particular has 5 or 600k miles on his rig using the MaxLife. I am extremely tempted to give it a go on my next service.