Automatic Trans Fluid Suck/ Pump?
 

I feel like this is a question for Guy, let's see who knows...

I want to do a transmission flush on my Jeep. But it's long overdue and I don't want to drain 4 quarts from just the pan... which sounds like half an oil change to me. So how do I suck out/ pump out the rest of the fluid from the converter?

The converter in the Explorer has a drain plug on it. When I did the conversion I drained it but that is the only one I've ever seen with one. When I had the old 4R55E serviced they hooked a machine up to it that pumped new fluid through it. I don't see how you could do it any other way.

You can do the cheater method, pull the drain on the pan, funnel on the dipstick tube and start the engine, it still engages the pump even in neutral and you pour the fluid in through the top, as long as you do it quickly it'll flush everything without any damage since you're not actually driving the trans, if it does go dry then the pump disengages the TC anyhow and wont damage either of them.

When I blew up the trans in the 08 thats how I did it. I was able to reuse the torque converter since it was flushed out, however fixing all the broken shit wasn't done so by flushing obviously.

If its long overdue I would save myself the trouble and have a shop use the machine to do it. Only problem is a lot of those "lube" places dont like to replace the filter or charge a lot for it. You can have them do the flush and then replace the filter yourself. Fluid is cheap. I just change my fluid, regular pan only change, and filter every year. That way the fluid is always clean and doesnt call for a full flush.

I have done it by taking the cooler line off at radiator, running the line into a drain pan, running it at idle, while adding fluid through the dipstick tube. Let it warm up before disconnecting the line, so it's not on fast idle.

One of the shops I worked at did not have a flush machine, and that was how we did them.

That's a really good idea...

Yours too Guy. But I got curious so I slid under there last night and there is a little plastic window on the bellhousing, so I'll bet there is a TC drain plug. Just went ahead and ordered the 8 quarts.

If its got a drain plug it'll get about 70% of the fluid out. Buy 10 quarts and use 2 to push the rest out. Should be pretty clean after that