I'm getting my transmission fluid trained but the shop wants way too much for the filter and fluid so I'll be paying for the labor alone being $50 and buy a [ame="http://www.amazon.com/gp/product/B000C9QX50"]ACDelco TF289 Automatic Transmission Filter[/ame] online. I can't find the ACDELCO DEXRONII fluid anywhere. There's a bottle available on Amazon but it's only 9 ounces. I'm guessing I'll need around 5 quarts for the job. Can I mix the current ATF with a different brand of ATF such as Pennzoil? Thanks.
BTW, I have a '94 Fleetwood with the 4L60E automatic transmission.