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Changing ATF in an old car #4505683
09/02/17 05:18 PM
09/02/17 05:18 PM
Joined: Jan 2017
Posts: 107
Europe
Ether Offline OP
Ether  Offline OP
Joined: Jan 2017
Posts: 107
Europe
What are your thoughts on changing the Automatic Transmission Fluid on a 33 year old car that has the original Fluid and 50,000 miles.Fluid is Red and appears clean.I have heard a suggestion of draining out and replacing a litre of fluid every few thousand miles,instead of replacing the entire amount at one change,what is the reasoning behind this idea? is there any merit to this,or is it nonsense? Would you just replace all the Fluid,and fit a new strainer/filter in a single drain and refill,and maintain from there?

Re: Changing ATF in an old car [Re: Ether] #4505693
09/02/17 05:25 PM
09/02/17 05:25 PM
Joined: Apr 2012
Posts: 5,595
MA
Wolf359 Online content
Wolf359  Online Content
Joined: Apr 2012
Posts: 5,595
MA
The standard recommendation is to change it. But not to use a flush machine, just a drain and fill and change the filter and clean the magnet. The only reason you hear people telling you not to do it is from the mechanics who don't want the liability of the transmission failing soon afterwards and being blamed for it. If it's going to fail, it will fail regardless of whether you change the fluid or not. Usually people think of changing the fluid when they start having transmission problems so the two sometimes goes hand in hand. You could always get a suction machine and suck out as much as you can out of the fill tube and refill with fresh fluid, but that still doesn't get to the filter or magnet which is why a pan drop and fill is still recommended.

Re: Changing ATF in an old car [Re: Wolf359] #4505742
09/02/17 06:29 PM
09/02/17 06:29 PM
Joined: Oct 2014
Posts: 591
On the road Midwest
Ihatetochangeoil Offline
Ihatetochangeoil  Offline
Joined: Oct 2014
Posts: 591
On the road Midwest
Believe it or not, I try to do most of my own work, and MONEY is NOT my motivation; (I can afford to pay a mechanic) vehicle longevity is. I do a combination of the above; I use a Pela 6000 mighty vac (manual suction pump) to pull the ATF out prior to dropping the pan. It minimizes the mess under the car. I also a 15 quart clear plastic rectangular salad bowl that I bought at a flea market for $10 as a transmission drain pan. Leave one side of the pan bolts partially in so that when the pan seal is broken (maybe with a putty knife), the pan doesn't drop completely and splash fluid everywhere. Protect under the vehicle with scrap cardboard and I don't end up with a drop of fluid on my clean garage floor. Wipe the pan out clean, wash the debris off the magnet, use silicon grease to lubricate the new gasket (so you don't have to PRY the pan off next time), torque the bolts to 120 inch pounds (or whatever the spec is for yours) and I do this better than the local mechanic. The difference is I'm not being paid by the hour and I don't care how long it takes on Saturday morning. Have a cup of coffee and listen to favorite music while you take care of your car.

Re: Changing ATF in an old car [Re: Wolf359] #4505764
09/02/17 06:58 PM
09/02/17 06:58 PM
Joined: Apr 2010
Posts: 4,559
Storrs, Connecticut
jeepman3071 Offline
jeepman3071  Offline
Joined: Apr 2010
Posts: 4,559
Storrs, Connecticut
Originally Posted By: Wolf359
The standard recommendation is to change it. But not to use a flush machine, just a drain and fill and change the filter and clean the magnet.


+1


2000 Jeep Cherokee 4.0L (181k) - Pennzoil 10w30, Napa Gold 1516, Magnefine trans filter
2009 BMW 328i (36k) - Castrol Edge Euro 0w40, MANN HU816X
Re: Changing ATF in an old car [Re: Ether] #4505787
09/02/17 07:22 PM
09/02/17 07:22 PM
Joined: Dec 2013
Posts: 2,098
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,098
socal
I would replace the filter and do multiple drain and fillls


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Changing ATF in an old car [Re: Ether] #4505795
09/02/17 07:34 PM
09/02/17 07:34 PM
Joined: Jul 2013
Posts: 413
D/FW Metroplex
The_Nuke Offline
The_Nuke  Offline
Joined: Jul 2013
Posts: 413
D/FW Metroplex
Do you know the type/model of the transmission?

(GM TH350, Ford C6, etc.)


2012 Charger Pursuit aka "The Bacon Hauler"
- 5.7L + NAG1 (A5) + 2.62 (215mm)
Re: Changing ATF in an old car [Re: Ihatetochangeoil] #4505826
09/02/17 08:23 PM
09/02/17 08:23 PM
Joined: May 2016
Posts: 718
Canada
i_hate_autofraud Offline
i_hate_autofraud  Offline
Joined: May 2016
Posts: 718
Canada
Originally Posted By: Ihatetochangeoil
Believe it or not, I try to do most of my own work, and MONEY is NOT my motivation; (I can afford to pay a mechanic) vehicle longevity is. I do a combination of the above; I use a Pela 6000 mighty vac (manual suction pump) to pull the ATF out prior to dropping the pan. It minimizes the mess under the car. I also a 15 quart clear plastic rectangular salad bowl that I bought at a flea market for $10 as a transmission drain pan. Leave one side of the pan bolts partially in so that when the pan seal is broken (maybe with a putty knife), the pan doesn't drop completely and splash fluid everywhere. Protect under the vehicle with scrap cardboard and I don't end up with a drop of fluid on my clean garage floor. Wipe the pan out clean, wash the debris off the magnet, use silicon grease to lubricate the new gasket (so you don't have to PRY the pan off next time), torque the bolts to 120 inch pounds (or whatever the spec is for yours) and I do this better than the local mechanic. The difference is I'm not being paid by the hour and I don't care how long it takes on Saturday morning. Have a cup of coffee and listen to favorite music while you take care of your car.


Yeah! - Right on!

Re: Changing ATF in an old car [Re: Ether] #4505828
09/02/17 08:24 PM
09/02/17 08:24 PM
Joined: Aug 2014
Posts: 616
WA
SnowDrifter Offline
SnowDrifter  Offline
Joined: Aug 2014
Posts: 616
WA
I'd replace it. The logic with not doing older transmissions if they've never had fluid is because the friction material is shot, and the particulate floating in the fluid is what allows the clutches to continue to grab.

But based on what you've described on fluid color and mileage, I doubt that's the case here.

I'd say go ahead and change it. Based on the mileage and age, I'd suggest dropping the pan and tossing a new filter in as well. I like to swap my trans filters every 30-50k and do fluid at the same time


2005 Tahoe - 135k
2003 Forester(the swagger wagon) - Rehomed
1999 Passat - Rehomed
Re: Changing ATF in an old car [Re: Ether] #4505882
09/02/17 09:55 PM
09/02/17 09:55 PM
Joined: Sep 2015
Posts: 6,080
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 6,080
Kalifornia Kollective
What car, what tranny ... Buick DynaFlow is a whole lot different than a TH350 ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Changing ATF in an old car [Re: Ether] #4505970
09/03/17 04:24 AM
09/03/17 04:24 AM
Joined: Oct 2005
Posts: 7,094
Colorado
Kuato Offline
Kuato  Offline
Joined: Oct 2005
Posts: 7,094
Colorado
Originally Posted By: Ether
What are your thoughts on changing the Automatic Transmission Fluid on a 33 year old car that has the original Fluid and 50,000 miles.Fluid is Red and appears clean.I have heard a suggestion of draining out and replacing a litre of fluid every few thousand miles,instead of replacing the entire amount at one change,what is the reasoning behind this idea? is there any merit to this,or is it nonsense? Would you just replace all the Fluid,and fit a new strainer/filter in a single drain and refill,and maintain from there?


Pan drop, change filter, refill. Repeat every 50k.


Thick vs Thin test: 15k / 43k miles complete
Re: Changing ATF in an old car [Re: Ether] #4506014
09/03/17 07:06 AM
09/03/17 07:06 AM
Joined: Aug 2010
Posts: 5,940
Champlain/Hudson Valley
Kira Offline
Kira  Offline
Joined: Aug 2010
Posts: 5,940
Champlain/Hudson Valley
ihatetochangeoil and i_hate_autofraud are in the "Zen zone".

Just avoiding the chatter one encounters when having a car serviced is worth any effort. Savings are gravy.

Re: Changing ATF in an old car [Re: Ether] #4506026
09/03/17 07:24 AM
09/03/17 07:24 AM
Joined: Jun 2003
Posts: 33,575
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,575
ME
Do it. I saved a 20 y/o cutlass ciera with a clogged up filter that would slip in all gears except 1st. The filter reduced pump pressure which reduced the clutch holding ability.

It didn't need any more "silt" floating around in the fluid.

Get the filter! If you drop the pan you get half the fluid which 1) is procedure anyway and 2) will let the TC fluid "mix in" if that's what you really want.

Don't let someone flush it because that creates a weak spot in your cooler line hoses.

I'd go in for another filter and fluid in a year, regardless of mileage.

Re: Changing ATF in an old car [Re: Ether] #4506317
09/03/17 01:03 PM
09/03/17 01:03 PM
Joined: Jan 2017
Posts: 107
Europe
Ether Offline OP
Ether  Offline OP
Joined: Jan 2017
Posts: 107
Europe
Thanks to everyone for your replies.I will do a fluid change myself,drop the pan as there is no drain bolt,and replace the filter,no flush.The vehicle is a European Ford Escort that has the Ford ATX Transmission,the same Automatic as used in the US Spec Escort/Lynx.The Transmission calls for Fluid meeting Spec M2C- 166-H which i believe is conventional ATF Dexron 11/111 so i have chosen Fuchs Multi purpose Titan 3000 for the change.

Re: Changing ATF in an old car [Re: Ether] #4506646
09/03/17 06:58 PM
09/03/17 06:58 PM
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
Mercon or equivalent


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30

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