Like wise you could simply put a tube down the filler tub to the bottom of the pan and suck out the fluid. Drain and refilling what comes out of the sump every 15K miles is too idiot proof to change to any other means. It the transmission must be running to get the torq conveter and the rest of the fluid inside the trans that is not in the pan!īy car that have drain plugs on their automatics like all Toyota's and you wil never have that issue. Your method and the tube down the fill up tube both fail to get what is int he circuits of the trans and the converter. It would work about as well as sticking a hose down the transmissions fill tube and sucking the sump dry. As the fluid pumps out of the trans it puts pressure on the bladder forcing the new fluid in the return line for the transmission. The other side of the bladder is where the new fluid is. The line going out of the trans goe to the side of the conatiner that the bladder rests one. Do you know if this already exists or if there is something similar that could be adapted to do the job?Īnother posibility would be to use a veeery long transparent hose that you would fill with new oil, then just connect both lines to it and wait till the new oil is into the transmission and the old is in the hose.įirst most flush machines us a cancainer with a bladder in it. You just have to be very careful to stop the engine before the piston comes to the end, so you don't put too much pressure into the lines. Your start the engine and the oil starts to flow, pushing the piston and pressuring the new oil into the transmission with the same pressure as it leaves, so the oil level remains constant. Connect the outlet side of the cooler line to the empty side and the inlet to the full side. Then you move the rubber piston to one extreme and fill it with new oil. Then you don't have the common syringe piston, just the rubber part, but with a metalic core just like a Tea-Pot, running all along the syringe so the rubber piston doesn't twist. Imagine a big syringe with the capacity of your transmission, that is the same in both sides, needle side. It may not work, but I just exhibit here to know your opinion. I had an idea to build something similar more simply. I've been reading about transmission flushing machines and it looks like all they do is equal the pressure they inject new oil into the system to the pressure the transmission pump pumps the old oil out.
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