For the 4WD GMC Envoy, I picked up some ACDelco Auto Trak II for the transfer case, but I'm not sure about the front/rear differentials. I picked up Royal Purple 75W-90 for $13/qt, but before I put that in, is that the best choice? I can always return the Royal Purple... As for the 4L60E, O'Reilly carries Valvoline Dex VI, or I can get ACDelco Dex VI on Amazon for $5.91/qt. What about Royal Purple Max ATF? I feel like that should be a more premium product, but it specifically states it doesn't meet Dex VI specs...
For the 2WD Chevy truck, for the differential, should I use the same Royal Purple 75W-90, and the same ACDelco Dex VI ATF for the 700R4, or are there better options?
Thanks for any input.
For the 2WD Chevy truck, for the differential, should I use the same Royal Purple 75W-90, and the same ACDelco Dex VI ATF for the 700R4, or are there better options?
Thanks for any input.