Thread: Royal purple max or GM dex 3

Dexron VI...its backwards compatible and considered by GM to be superior to Dex 3 AND costs very little more than Dex 3. Walmart Supertec Dexron VI is about $4 per quart. I have been using Dexron VI for the last 100,000 miles in my original 4T65E tranny and it now has 180,000 miles on it working perfectly.