Originally Posted by Mark G

Easy way to get all your tranny fluid out is drain and replace it add an extra quart of trans fluid. Then pull one of the tranny cooling lines off at the radiator/cooler and put a hose on it ...and also on the part coming out of the radiator/cooler (in case you don't know which side it will come out). Put both hoses into a 4 or 5 gal bucket. Now, hold the hoses securely and have a helper start the vehicle and watch the fluid going into the bucket and have them shut it off when it turns clear. If it takes a while, you might want to shut the vehicle off and add a couple quarts in between. The whole process only takes 15-20 seconds ...you'd be surprised how much fluid comes out.

After that, top off the trans fluid. What happens is the pump draws new fluid into it and pumps what's in the torque converter back to the tranny. You might want to use high-mile tranny fluid as it will have anti-shudder agents for high-mile trannys.

I do the above sequence when I change tranny fluid on all my vehicles for years. I haven't changed tranny fluid in my Disco yet, but I just bought the stuff.