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Vacuum removal of transmission fluid #4448718
07/03/17 06:54 PM
07/03/17 06:54 PM
Joined: Feb 2013
Posts: 1,114
Prospect, KY
spk2000 Offline OP
spk2000  Offline OP
Joined: Feb 2013
Posts: 1,114
Prospect, KY
I am wanting to change some of the fluid in my 96 grand marquis. thinking of using my vacuum oil pump to remove as much as I can then replace with that same amount and check the level. Transmission is shifting funny after it heats up for about 30 minutes highway speed on really hot days. Hoping replacing some of the fluid will make it stop. Any reasons I should not do this?

Also is Mercon V the correct fluid? Not really finding it anywhere.


96 Grand Marquis
01 Sable LS
02 Montero
Re: Vacuum removal of transmission fluid [Re: spk2000] #4448728
07/03/17 07:02 PM
07/03/17 07:02 PM
Joined: Dec 2013
Posts: 2,455
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline
Joined: Dec 2013
Posts: 2,455
Fort Worth, Texas
You need to make sure the transmission is not overheating.....Using a capable scan tool is the easiest way.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Vacuum removal of transmission fluid [Re: spk2000] #4448733
07/03/17 07:06 PM
07/03/17 07:06 PM
Joined: Mar 2004
Posts: 21,123
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 21,123
Upstate NY
Have you looked for a drain plug?

A cooler line ATF exchange is a better way to go if you want a complete ATF exchange.

Doing what you mention is good to refresh the ATF. You need a total exchange of the ATF.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Vacuum removal of transmission fluid [Re: spk2000] #4448746
07/03/17 07:19 PM
07/03/17 07:19 PM
Joined: Oct 2014
Posts: 2,550
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,550
San Antonio, TX
This chart should let you cross index your transmission or transaxle to the Ford specified fluid

Ford 2014 & Earlier Transmission Fluid Chart Link

(Note everything on the 1996 line specs Mercon V)

Last edited by Nyogtha; 07/03/17 07:21 PM.

"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen
Re: Vacuum removal of transmission fluid [Re: spk2000] #4448765
07/03/17 07:35 PM
07/03/17 07:35 PM
Joined: Dec 2014
Posts: 1,684
'murica
Ethan1 Offline
Ethan1  Offline
Joined: Dec 2014
Posts: 1,684
'murica
Do it. I even use a vacuum pump before I do a pan drop to make the process cleaner. I used to do oil changes with a vacuum pump when I had a car with messed up drain plug threads.

If you're going to keep the car for a while, I recommend replacing the filter at least and maybe installing an aftermarket pan with a drain plug.

Re: Vacuum removal of transmission fluid [Re: spk2000] #4448773
07/03/17 07:43 PM
07/03/17 07:43 PM
Joined: Oct 2014
Posts: 12,585
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,585
Idaho
Probably the best thing to do would be a pan drop and replace the filter. It the trans still slips go from there.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Vacuum removal of transmission fluid [Re: spk2000] #4448801
07/03/17 08:01 PM
07/03/17 08:01 PM
Joined: Oct 2010
Posts: 1,794
california
wrcsixeight Offline
wrcsixeight  Offline
Joined: Oct 2010
Posts: 1,794
california
Gotsta get at the in pan filter, in my opinion. The appearance of the bottom of the pan can help one decide whether to spend any money on the AT.

I recently dropped my pan, added a fram XG16 on an external mount, and have filled it with nearly 7 quarts of the 12 qt capacity. There was noticable shift quality difference being firmer and faster. I had no slipping, just a seeping steel cooler line I had to replace anyway which forced the other procedures.

I have a drain plug, and will likely wait for a deal on ATF+4 and then let it drain overnight and replace with the same amount.

First time I got it on the highway for a bit, and pulled off to check, i found the level low. No leaks, Took highway driving to purge all the air I guess. Carry extra after refilling.

Re: Vacuum removal of transmission fluid [Re: spk2000] #4448877
07/03/17 09:08 PM
07/03/17 09:08 PM
Joined: Dec 2013
Posts: 2,098
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,098
socal
I would do a filter replace and drain n fill at the least.


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Vacuum removal of transmission fluid [Re: spk2000] #4448975
07/03/17 11:32 PM
07/03/17 11:32 PM
Joined: Sep 2015
Posts: 3,948
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,948
Connecticut
More than likely your 1996 was originally specced for Mercon. Since 2001 Ford has back specced everything to Mercon V (ie their spec chart). Only difference is that Mercon is semi-synthetic, shears half as fast as Mercon, and will last longer between OCI's. Since the cost of the 2 is not very different, I'd just go with the Mercon V SuperTech at $4.29/qt.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Vacuum removal of transmission fluid [Re: spk2000] #4449016
07/04/17 03:34 AM
07/04/17 03:34 AM
Joined: May 2012
Posts: 5,681
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,681
Fort Lauderdale, FL
Get that pan off. You might be amazed at what's sitting in the bottom of even a good transmission after all of that time.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Vacuum removal of transmission fluid [Re: spk2000] #4449025
07/04/17 04:15 AM
07/04/17 04:15 AM
Joined: Jan 2011
Posts: 2,837
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,837
N.Ohio
Like stated, you need to change out the filter too. Sucking 4 or 5 quarts out likely won't do anything. You can do a fluid siphon later after the filter change. I believe that transmission has a drain plug for the converter where you can get all 12 quarts out of the transmission. You might want to check on that. Fill up with mercon V.

Last edited by Lubener; 07/04/17 04:19 AM.

The "thinking" man's friend.
Re: Vacuum removal of transmission fluid [Re: barkingspider] #4449144
07/04/17 07:44 AM
07/04/17 07:44 AM
Joined: Sep 2004
Posts: 7,829
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,829
Marshfield , MA
Originally Posted By: barkingspider
I would do a filter replace and drain n fill at the least.
Yah that is what I did to a 727 in my first Grand Wagoneer. A pan drop,new flocked filter, gasket and 3-4 qts of Dextron. A hail Mary advised by my BIL. I limped home in dribs and drabs, taking 40 minutes to go 4 miles. The filter was plugged and not letting any ATF to pump. The fluid was dark and the pan was full of sludge. After a cleaning of the pan and a refill, it ran like new when I test drove it.


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Vacuum removal of transmission fluid [Re: spk2000] #4449161
07/04/17 07:57 AM
07/04/17 07:57 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
I disagree with almost all of the above posts depending on how much effort you are able to SAFELY provide. Dropping the pan requires certain tools (jack and jackstands) to do it safely while using a vacuum pump can be performed under the hood. It all depends on your own circumstances and skill level.

A Ford ATF filter is a "lifetime" filter which only captures very large debris, but changing some of the ATF to "fresh" fluid can help your overheating more.

SPK2000:

Your 1998 Mercury Marquis 4.6L 8-cylinder has transmission 4R70W.

If you drop the pan it will drain between 4-5 quarts (assuming you have the correct level now).
You should be able to remove nearly this much with a vacuum pump and it is much easier to use the pump.
You can drive around for a few days and then vacuum out again and add more new ATF and this will give you a good "refresh".



If you perform a complete flush including the Torque Converter, then the total capacity of your transmission is:

Automatic Transmission, Total Fill
4 speed 4R70W..........13.9 quarts


Wal-Mart has a great ATF for $18/gallon (4-qts) called Valvoline Max-Life...it is a full synthetic and it is compatible with your current fluid:

https://www.walmart.com/ip/Valvoline-Max...13=&veh=sem

If you decide to change the Trans Filter then here is a good kit: https://www.summitracing.com/parts/wix-58955


Last edited by ArcticDriver; 07/04/17 08:11 AM.

Multiple Diesel and Gasoline vehicles
Re: Vacuum removal of transmission fluid [Re: spk2000] #4449178
07/04/17 08:10 AM
07/04/17 08:10 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
I would also visually inspect the radiator to see if there is debris like insects blocking good air flow.

And I meant 1996 in my above post...although 1998 is the same.

Last edited by ArcticDriver; 07/04/17 08:15 AM.

Multiple Diesel and Gasoline vehicles
Re: Vacuum removal of transmission fluid [Re: spk2000] #4449601
07/04/17 03:59 PM
07/04/17 03:59 PM
Joined: Feb 2013
Posts: 1,114
Prospect, KY
spk2000 Offline OP
spk2000  Offline OP
Joined: Feb 2013
Posts: 1,114
Prospect, KY
Did the vacuum and got 4 quarts out. Have driven it yet to see if it's improved or not yet. $20 for 5 qts of ST Mercon V at Walmart. Would have liked the Valvoline but the Walmart I went to did not have it. Meijer only had Mobil 1 for more than twice as much. I may get around to a full fluid replacement but wanted to see what this might do. The car is not worth much at this point. It has been sideswiped and backed into the front end. Nearly 180,000 miles now and I paid $3,100 for it 7 years and nearly 100k miles ago. It has been a great car with minimal problems. If it dies I am likely to get another newer one with low miles.


96 Grand Marquis
01 Sable LS
02 Montero
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