Homemade trans flusher with a mityvac?
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That sounds like 10,000+ pumps of that little pump. If you want a complete flush instead of just a drop-pan change, do a gravity feed into the radiator return line and let the pump to the radiator be the drain. I did this on a car a long time ago and it was easy. The secret is to get a container that holds the total amount of fluid that the transmission holds and go until one container is empty and the other full.
Not the little vacuum pump,I mean the fluid evacuator/ changer.Looks like with some rigging it could be pressurized into a stream of new fluid while letting old fluid bleed out.I dont think the gravity feed thig would work unless you were pressurizing it in some way..I was just trying to do a Rube Goldberg setup without having to do a pan drop.
I've got one of those MityVac evacuators. I haven't tried it on a complete transmission fluid change, but one of my students over-filled their trans. No problem drawing out a quart and a little. I would think it would suck out the whole contents (almost) of the pan easily.
It is handy -- I have found a couple of uses for it I never anticipated. I'm happy.
I got it on sale from the Tool Warehouse. They are on-line, but I ordered from their paper catalog. IIRC it was just less than $50.
It is handy -- I have found a couple of uses for it I never anticipated. I'm happy.
I got it on sale from the Tool Warehouse. They are on-line, but I ordered from their paper catalog. IIRC it was just less than $50.
I use my MityVac evacuator for the cars that don't have a transmission drain plug. On my GMC Sonoma, I get 3-4 qts. out. Then every three years (~30K miles) I would drop the pan and change the filter as well. Having the evacuator makes a big difference since most of the ATF is already pumped out so dropping the pan isn't so messy or difficult.
I did it by pressurizing the container with about 2-3 lb of air. Gravity would work just as well, you would need probably 6' of height.
How about one of these? 8.8 liters is a pretty good size.
http://www.thetoolwarehouse.net/shop/MIT-7201.html
http://www.thetoolwarehouse.net/shop/MIT-7201.html
You can flush the AT with no special equipment, just 2 or 3 people. Disconnect the transmission line at the cooler and route into a bucket or pan. Have one person watch for new fluid to come out, one to pour in new fluid via dipstick and one to be in car ready to turn off engine.
Yes, but there's something really good about being able to pull a dipstick, suck out the fluid, replace it, and be done. I'd do that once a year regardless of mileage, as it's so easy and cheap. I could change the filter every 30-40k or so.
Right, but that method does not get the old fluid out of the torque converter which is over 50%.
True, but neither does just draining it. Sure, you could flush it out by disconnecting the cooler lines, but if you suck 3-4 quarts out frequently, you would get most of the same effect for little effort or money. I don't know about you, but disconnecting rusty crusty connectors at the radiator isn't exactly a confidence-inspiring event.
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