I checked my moms car trans fluid and its low, but its not dangerously low, but tommorow when I find my funnel to pour the fluid in.

But I took the car to a shop were I lived just to see what type of fluid to get which he told me dexron 3/mercon. But I went to the store and bought the same name but did not know what brand to buy so I got the expensive one which was valvoline max life for high mileage trannies and which my mom's taurus has 129,000 miles on it.

My mom car is a 2000 ford taurus with the 24 valve duratec engine. How much fluid should I put in the trans, the guy told me a half of bottle.

So before I do it did I buy the right brand and do I only use a half of bottle of fluid.

Add a little then shift the car in and out of gear a few times, check again and repeat till full.

okay herc, but one more question will it harm the trans if I add new fluid in with the old and the kind im using is valvoline max life for high mileage cars.

As long as you stick to the recomended type dexron what ever then it'll be fine. Don't worry about brand names.