Draining torque converter
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Elder User
Joined: Mar 2006
Posts: 588
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From: Bellville TX. Wof Houston
Draining torque converter
Ok so I'm draining The TC
I would think that when the plug in back in all's ya have to do is start the engine and the fluid will go from the trannie into the TC.
This being the case does anyone know if a person didn't drain the TC and did a fluid change would the fluid stay in the TC or work its way out and be replaced with the new stuff
If I explained it right.
I changed the fluid a few weeks ago and didn't kno how to do the TC now that I know I'm doing it and the fluid that came out stank like well you know what..
So I'm thinking that the new fluid didn't mix with the old
I would think that when the plug in back in all's ya have to do is start the engine and the fluid will go from the trannie into the TC.
This being the case does anyone know if a person didn't drain the TC and did a fluid change would the fluid stay in the TC or work its way out and be replaced with the new stuff
If I explained it right.
I changed the fluid a few weeks ago and didn't kno how to do the TC now that I know I'm doing it and the fluid that came out stank like well you know what..
So I'm thinking that the new fluid didn't mix with the old
Postmaster
Joined: Aug 2004
Posts: 2,908
Likes: 2
From: West Mansfield, Ohio
That is correct. Converter holds quite a bit.
I was told by the local tranny shop that in order to properly change the fluid, you need to drop the pan, drain the converter, and also flush out the lines. He said in order to do this properly you will need about 22 quarts of fluid. I think a couple of them were to be used to flush the old out of the lines, but I'm not sure.
I was told by the local tranny shop that in order to properly change the fluid, you need to drop the pan, drain the converter, and also flush out the lines. He said in order to do this properly you will need about 22 quarts of fluid. I think a couple of them were to be used to flush the old out of the lines, but I'm not sure.
Post Fiend
Joined: May 2004
Posts: 11,289
Likes: 6
From: Lakewood, Ohio
the convertor is inline with the trans, cooler lines, and tank in radiator as the rest of the route the fluid takes.
i recommend lucas trans additive as one of the quarts when you refill.
i recommend lucas trans additive as one of the quarts when you refill.
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Elder User
Joined: Nov 2005
Posts: 523
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From: Murfreesboro, Tennessee
Yea to do a good flush you need about 20 quarts. You just drop the pan and get all the old stuff out and put her back up there. Drain the TC and put the bold back in. Fill the tranny and take the return off and have it to a drain container. Run it twice (the process said above with out TC step) and on the second drain the TC again and then button her up fill her up and be sure to slap the return back on. She will be shifting like a well oiled machine (no pun intended)
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Lead Driver
Joined: Feb 2002
Posts: 7,955
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From: Greater Austin, Texas
The converter holds more than 4 quarts. When I drain the converter on my Expedition's 4r100, and drain the pan, it takes 14+ qts. to fill it back up. If I just do the pan, it's about 4-5 qts.
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Elder User
Joined: Mar 2006
Posts: 588
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From: Bellville TX. Wof Houston
Well All went well....
I drained the TC and let it sit over night " it got dark on me"
I was VERY amazed this morning My drain pan all most runnith over...
What I did was change the fluid about a week ago and didn't know about the TC so now it's drained......and YES I went back with a bottle of Lucus...
It seems to shift quite a bit smoother now.....
I'm still amazed at the ammount that come out of the TC....
Thnaks everyone
I drained the TC and let it sit over night " it got dark on me"
I was VERY amazed this morning My drain pan all most runnith over...
What I did was change the fluid about a week ago and didn't know about the TC so now it's drained......and YES I went back with a bottle of Lucus...
It seems to shift quite a bit smoother now.....
I'm still amazed at the ammount that come out of the TC....
Thnaks everyone
Cross-Country
Joined: Mar 2006
Posts: 80
Likes: 1
Jas88 i worked at a bus company for 3 years changing fluids. I have probably changed tranny fluid in E4OD and R4100 trannys over 150 times. We always installed the deep 4/4 pan on all busses. They all took 10quarts if you just dropped the pan and filter and 14 quarts when you drained the converter. I dont see how you expedition could have a larger TC then the 7.3 vans but anything is possible. It is also possible that our ATF gun did not count the actual quarts accurate but it was the same for 3 years.
