| pan capacity [message #361635] |
Sun, 10 January 2021 18:01  |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
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Senior Member |
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I have looked through the searches and can't find any listing of how much tranny fluid I would expect to need with a filter change after letting it sit over night to get the most out of the torque converter. Any one out there got any close numbers from experience. Thanks in advance. And before someone mentions to make sure the tube is the correct size I was able to get hold of an original AC PF-169 filter.
Skip Hartline
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
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| Re: pan capacity [message #361638 is a reply to message #361635] |
Sun, 10 January 2021 18:39  |
boybach
Messages: 566
Registered: December 2020
Location: Vancouver Island
Karma: 4
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Senior Member |
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On other vehicles I always measure what comes out and put the same amount back in.
HTH
Larry
Larry - Victoria BC -
1977 ex-Palm Beach "Ol' Leaky" 40,000 miles, PO said everything working but forgot the word NOT. Atwood helium fridge, water heater & furnace. SS exhaust system, Onan, Iota Converter, R134A, New fuel lines & heat exchange hoses
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| Re: [GMCnet] pan capacity [message #361639 is a reply to message #361638] |
Sun, 10 January 2021 19:09 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Buy 10 quarts of the ATF you want to use. Replace the filter, and inspect
the gasket on the pan. If it is intact, you can safely re-use it. Any
tears, or leaks, replace it. Replenish the fluid with the amount you
drained. Start and run the engine. After a couple of minutes, crawl under,
check for leaks. If none, remove the modulator. If no fluid comes, pour
more into until it does. Replace the modulator, and test drive the coach.
Check the dipstick and mark it. That's your full line.
Jim Hupy
Salem, Oregon
On Sun, Jan 10, 2021, 4:40 PM twlldeen--- via Gmclist <
gmclist@list.gmcnet.org> wrote:
> On other vehicles I always measure what comes out and put the same amount
> back in.
>
> HTH
>
> Larry
> --
> Larry - Victoria BC -
>
> 1977 Palm Beach VIN TZE167V101295 - 39,000 miles
>
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> GMCnet mailing list
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| Re: pan capacity [message #361640 is a reply to message #361635] |
Sun, 10 January 2021 19:48 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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I posted this about 10yrs ago as a method to drain and refill ATF. So here it is. Hope it helps.
You can get most of the ATF fluid out of the transmission using the following procedure. Keep in mind, there are several (perhaps many) that would not do this. (including IIRC Manny). I've done it many times with no ill results. Sooooooo.....
This is a very messy procedure; you're gonna spill fluid, so be prepared with dry rags and the like to clean-up afterwards.
1. Do this with the trans cold. Wait at least over night.
2. Raise the coach high enough to get a 5 gal pail under it with room to spare.
3. Disconnect both trans lines at the radiator, and be prepared to catch the fluid coming out of the cooler in the radiator.
4. Attach hose extensions to the lines and drop the lines into the 5 gal pail.
5. Using two people, start the motor for only couple of seconds. Do this to identify which line the fluid will come out of. Now you know which line you *must* keep in the bucket.
6. Again, using two people, (one to run the motor, the other to watch the fluid) start the motor.
7. Run the motor until the fluid line begins spurting air. Shut motor off immediately! The fluid will get quite frothy.
8. Allow to stand without the motor running for 4-5 minutes. This will let excess fluid in the trans drain down into the pan.
9. Start the motor again for no more than 5 seconds. Shut off the motor. This will pump out that last little bit in the pan and make dropping the pan a lot less messy.
10. Let the oil lines drip into the pail while you drop the trans pan.
11. Drop the trans pan, and replace the filter using two (2) "O" rings at the filter.
12. Hook up the two trans lines to the oil cooler at the radiator.
13. Fill the trans with about 7 quarts of trans fluid.
14. Start the motor and allow to idle for about 30 seconds or so before checking fluid level.
15. Check fluid level and add accordingly.
16. Once full, drive until normal operating temp is reached, and recheck fluid level. Add fluid to bring to "Full".
I've used this procedure on every auto trans that I've owned for .... well.... forever.
This is just the way I do it....your mileage may vary.
Just my relatively informed, off the cuff, back yard mechanic, gut level, eyeball it up and guesstimate, way of doing things....that's all...
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: pan capacity [message #361645 is a reply to message #361640] |
Sun, 10 January 2021 20:40 |
Paul Nadel
Messages: 9
Registered: May 2013
Location: Lakeland, Fl
Karma: 0
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Junior Member |
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Larry, I think your system of changing the ATF works. You may consider how ATF is changed on off-road equipment. The return line is placed in a 5 gal. pail of fresh ATF. The discharge line is placed in an empty bucket. Run the engine until fresh fluid is coming out of the return line. Shut off engine. Check oil level then drive vehicle to operating temp. Pull modulator to set level. Real close to what you are doing, except for the filter change. On the plus side all the ATF in the torque converter is changed.
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