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

 

you only change a small amount of fluid if you did not drain convertor.

drain convertor, change filter and put in new fluid.

 

The converter holds about 4qts.

 

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.

 

Takes about 14qts do fill a E40D 4R100 after changing filter and draining TC

 

thanks guys...

to tell ya the truth I was unsure how the TC got it's fluid.

 

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.

 

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)

 

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.

 

Doesn't a transmission flush do the same thing without disassembling the transmission?

 

but you need to change the filter and pan.

a flush does not do this.

 

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

 

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.

 

I agree BKB. Theres no way possible that the torque converter held more than the pan itself. It does take at least 10 whenever you just drop the pan.

 

Same here, I run lucas in everything, it's good stuff.