Transmission Fluid Change - Forget Dropping the pan - get this!

Zoe Saldana · Dec 15, 2021

I think we all hate dropping the pan and changing the transmission fluid.
Just get this:

https://www.amazon.com/HYDDNice-Extractor-Scavenge-Suction-Transfer/dp/B07VFTQTD7/ref=sr_1_15?keywords=12v+oil+extractor&qid=1639604288&sr=8-15

My truck hold a total of 12 quarts of fluid BUT if you drop the pan and change the filters it takes 9 quarts to re-fill it.
You NEVER get 100% out. You get 75% fresh fluid.

When using the pump I get 3.5 quarts out. I plan on doing it 3 times, maybe 4.

https://bobistheoilguy.com/forums/threads/multiple-at-drain-and-refill-a-waste-of-money.269681/

IDSandman · Dec 15, 2021

LouM · Dec 15, 2021

What about the filter?

Zoe Saldana · Dec 16, 2021

LouM said:
What about the filter?

Many vehicles do not even have filters these days. Think about all those trucks that don't change their fluid over 100K miles and everything still runs.

Zoe Saldana · Dec 16, 2021

IDSandman said:
View attachment 479858

Partial Drain Helper.xlsx

Shared with Dropbox

www.dropbox.com

Elvira · Dec 16, 2021

If you are taking the time to change fluid, change filter or clean screen too. It doesn't make sense to run clean fluid through a dirty filter or screen. You can still use the pump if you absolutely need to get 100 percent of oil out of trans. The amount that is left inside the trans after removing pan will not cause problems anyways, it will all go through a clean filter and or screen. Oil doesn't lose it's lubricating or cooling qualities, it gets contaminated from foreign debris, shavings, moisture etc. The reason they use filters or screens.

kurek · Dec 16, 2021

Gonna be a nope from me. The RFE transmission has two filters and if I'm changing the fluid I'm changing the filters.

For as infrequently as transmission fluid gets changed, it's cheaper to just do the pan than it is to buy extra tools to avoid doing the pan.

There are aftermarket pans with a drain plug though, if you want to do several changes in succession to entirely exorcise the old juice.

Zoe Saldana · Dec 16, 2021

Elvira said:
If you are taking the time to change fluid, change filter or clean screen too. I doesn't make sense to run clean fluid through a dirty filter or screen. You can still use the pump if you absolutely need to get 100 percent of oil out of trans. The amount that is left inside the trans after removing pan will not cause problems anyways, it will all go through a clean filter and or screen. Oil doesn't lose it's lubricating or cooling qualities, it gets contaminated from foreign debris, shavings, moisture etc. The reason they use filters or screens.

The only issue that COULD relate to a filter is if it is full - clogged. How many times has anyone even reported that.

Running new fluid through old vs fresh filter doesn't do anything to new fluid except clean it. It doesn't add dirt to the new fluid. If the filter did that there would be a problem with the filter.

HEMIMANN · Dec 16, 2021

How does anyone know when a filter's contaminant capacity is reached? Remember that trannys produce wear metal shavings from numerous gear teeth, and clutch shavings from numerous clutch packs.

If you're using paper media filters, these oxidize and disintegrate within several years (leave a newspaper in yer oven and see what happens).
You really wanna risk plugging hydraulic ports and starving a $4,000 transmission?
No thanks. Even if.it takes 100,000 miles to do so, I want full design life for my hard-earned payment.

Rlaf75 · Dec 16, 2021

Besides not having to pull the pan down how is that suction pump and different? You still wont get all the fluid out because the hose only goes into the trans pan anyway. It doesnt get the fluid out of the torque converter. Only a flush machine will get all out by replacing it with new oil.

Daw14 · Dec 16, 2021

They make this for people who are Not qualified to drop the pan , clean the pan ,clean the magnet , and change the filter or filters. Folks who think this is a good idea should get to the dealer for any and all service

Zoe Saldana · Dec 16, 2021

HEMIMANN said:
How does anyone know when a filter's contaminant capacity is reached? Remember that trannys produce wear metal shavings from numerous gear teeth, and clutch shavings from numerous clutch packs.

If you're using paper media filters, these oxidize and disintegrate within several years (leave a newspaper in yer oven and see what happens).
You really wanna risk plugging hydraulic ports and starving a $4,000 transmission?
No thanks. Even if.it takes 100,000 miles to do so, I want full design life for my hard-earned payment.

AAMCO Blog | Signs Your Transmission Fluid Filter is Clogged

Your transmission contains oil that can carry debris . Here's how to tell if your transmission fluid filters are clogged.

www.aamcoblog.com

Zoe Saldana · Dec 16, 2021

Rlaf75 said:
Besides not having to pull the pan down how is that suction pump and different? You still wont get all the fluid out because the hose only goes into the trans pan anyway. It doesnt get the fluid out of the torque converter. Only a flush machine will get all out by replacing it with new oil.

You never get all the fluid out when you drop the pan.

Zoe Saldana · Dec 16, 2021

Daw14 said:
They make this for people who are Not qualified to drop the pan , clean the pan ,clean the magnet , and change the filter or filters. Folks who think this is a good idea should get to the dealer for any and all service

mmm, no.

Let's say you want to drop the pan. Use this pump to get the fluid out of the pan BEFORE you drop the pan. It make the whole process easier and cleaner.

AND, if you do it on a regular basis you are constantly having the best fluid in; instead of waiting for the recommended intervals where the fluid degrades.

Zoe Saldana · Dec 16, 2021

https://bobistheoilguy.com/forums/threads/transmission-partial-drain-calculator-sticky.215133/

PoMansRam · Dec 16, 2021

My belief on this ATF/transmission topic is some service is always better than no service. There is always lots of wear materials suspended in the fluid. Refreshing the fluid removes wear materials. Of course the better service plan is to do a pan drop / filter(s) change along with this, but you don't need to do a pan drop/clean and filter change every time. The first time in the vehicle's first ~5yrs/60K miles is always going to be the worst.

Zoe Saldana · Dec 16, 2021

Rlaf75 said:
Besides not having to pull the pan down how is that suction pump and different? You still wont get all the fluid out because the hose only goes into the trans pan anyway. It doesnt get the fluid out of the torque converter. Only a flush machine will get all out by replacing it with new oil.

Not comparing it a flush - just dropping the pan.

Flush = bad idea.

PowayTransManny

LouM · Dec 17, 2021

Well I can still remember changing the fluid and filter on my power glide and gm 350 and 400's,
loosen the pan tip it down to drain, remove and clean the sludge off the bottom of the pan replace the filter,
then go up and pull the cooler lines off and shove a hose over the ends.
Fill the pan with fluid, start the vehicle briefly and see which hose flowed and which sucked.
Put the hose that flowed in an empty bucket, the one that sucked in a large jug of Trans Fluid,
start the engine and watch for clean fluid to show in the dirty bucket.
Shut down reconnect everything and get the level correct.
At that time some of the other manufactures actually had drain plugs in the torque converters.

Texcuda · Dec 17, 2021

Not changing the filters is a horribly bad idea, especially with the 68RFE (545RFE is basically the same trans). They already have valve body wear issues, due to MOPAR using the cheapest aluminum alloy to make the valve bodies, no need to accelerate the issue by trying to cut a corner.

Zoe Saldana · Dec 17, 2021

Texcuda said:
Not changing the filters is a horribly bad idea, especially with the 68RFE (545RFE is basically the same trans). They already have valve body wear issues, due to MOPAR using the cheapest aluminum alloy to make the valve bodies, no need to accelerate the issue by trying to cut a corner.

I have the 66rfe, so I'm good.

Transmission Fluid Change - Forget Dropping the pan - get this!

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