He said fluid exchange, that is perfectly fine. If the transmissions pump itself is pumping fluid out that will not harm it.
You are just removing the fluid with no machines involved and adding new fluid in by hand.
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He said fluid exchange, that is perfectly fine. If the transmissions pump itself is pumping fluid out that will not harm it.
You are just removing the fluid with no machines involved and adding new fluid in by hand.
There is a big difference. They make fluid flush machines and fluid exchange machines.
Flush machines use there own pump to force new fluid into a transmission and push the old fluid out. That is the best way to have clutch material get moved around and clog things like the valve body or feed lines inside the transmission.
Exchange machines and or doing the method in the previous posts use the transmission pump itself to do everthing. There nothing forcing fluid in and out and way less chance at internal issues. There are many vehicles out there with no internal filter or that have no way to remove the pan because they don't have one. They use plugs on the side to determine fluid level, so exchange machines work great, have it do the work for you then top off the fluid untill it comes out the full level plug hole.
never seen a powered flush machine, they all work off the tranny pump as far as ive seen. both rad cooler lines get hooked up to it, and they run the engine it till its flushed out.
that act can be done at home, with 2 pails, and should not be done on a high mile tranny with burnt fluid ever, or it can die. cant say this enough your tranny can be dead before it gets put in gear. seen it happen a lot.
the only people who should ever get a flush are the people who have owned the car since new and serviced the tranny every 50,000 miles of its life time, all others, never flush it.
yup i did. he said its dark. dont care what a mechanic says ever, why? cause i trust very few of them. id still not double pan drop or flush it.
the clutch material in the fluid could be all thats making it work at this point, a flush or double pan drop type deal could end up a bad thing. not worth the extra risk to me.
Fluid exchange: remove all fluid from transmission.
Fluid Flush: same as exchange, but chemicals are used to clean and remove sludge and build up
Exchange is good. Flush is bad.
Now back to my popcorn.
I have removed the return line going to the transmission. Wow, GM engineers sure don't leave much room to get a 18mm open ended wrench on that fitting.
Anyways, I am on the way to a store to get some magnets to place in the trans pan before I reinstall the pan. Then I am going to pour in the new trans fluid, and use the 3 second start procedure to remove all of the old crappy transmission fluid. I have a large hose on the end of the return line with a hose clamp, and I have the end of the hose in a clear plastic jug. That way I can tell when the old transmission fluid is finished draining out of the trans, and I will be able to see the new transmission fluid. When I see the new trans fluid, I will cease starting the engine, and I can proceed to hooking up the return line again to the transmission.
BTW. These steps are outlined on 02NavyBlue's write-up in the "How to write-ups" section (dated June 13, 2013). His directions of how to safely remove all of the old transmission fluid has been confirmed on other GM forum pages. There is zero chance of causing any harm, as this procedure has been used over and over. This is not a back-flush, and it will not dislodge any particles into the transmission unlike the "Transmission Fluid Flushing" machines that service centers use. It is completely safe as folks on Corvette forums and even foreign cars forums do this procedure and have never said that is caused harm to their tranny. My next door neighbor, who has worked on GM transmissions for 25+ years also said it is safe to do so.
In the 4T65E transmission, this "back-flushing" procedure using the transmissions own pump will remove up to 10 quarts of old transmission fluid. It will not remove what is in the converter. I am thankful that I took the time to read through the "How to write-ups" thread, or else I would have never known.
I will be providing another update later tonight.
Thanks everyone for your feedback!
Yeah, last pan drop I did on my 4t65e was about 8 quarts.
I was to understand that doing the fluid change that way does the torque converter though. Maybe that was just for the 4l60.
Sent from a galaxy far far away.
I do 7.5 qts with a pan drop/filter and I thought it was 10 total qts for a bone dry tranny?
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