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3.5 Engine Coolant Change / Transmission Fluid Change Intervals


durasel
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I have 2- 2010 Fusion Sports and was trying to look up the 3.5 coolant change and transmission fluid change intervals without much luck.

 

What would be a normal amount of time/milage to change these fluids?

 

They are both lower milage cars (23K and 25K) but are going on 3 years old.

 

Both fluids have not been changed yet.

 

I would say they get medium use.

 

Would appreciate some input from our members.

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Ha, guess I didn't go far enough in the scheduled maintainance guide!!

 

Still stuck with the gen 4 Taurus/Sable times!!!

 

Thank you!

 

Tried sending you a PM, but it wouldn't go through!!

Edited by durasel
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Ha, yeah the intervals on the new cars are a lot better for everything. I would leave the coolant alone until the 5 year point, but I would do a trans pan drain and refill every 50K (it has a drain plug!). Draining the pan is about 1/3 of the fluid capacity, so doing it that way ensures you get most of the original fluid replaced by 150k. You'll have to buy a stupid dipstick for it though since they got rid of them!

Edited by FusionDiffusion
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  • 2 months later...

Ha, yeah the intervals on the new cars are a lot better for everything. I would leave the coolant alone until the 5 year point, but I would do a trans pan drain and refill every 50K (it has a drain plug!). Draining the pan is about 1/3 of the fluid capacity, so doing it that way ensures you get most of the original fluid replaced by 150k. You'll have to buy a stupid dipstick for it though since they got rid of them!

Why do you recommend this?

 

I have a 2010 Fusion Sport and I am at 60k miles currently. I was going to do a transmission fluid change at this point. I started searching around and found a few sources stating that this particular trans fluid is service free? So I am leaning towards it being useless to change the fluid before the 150k mile interval. Interesting enough, I plan on keeping the car until it reaches 150k miles... But there seems to be mixed opinions out there with this particular car/transmission.

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150k on the fluid is really a best-case scenario (e.g. highway driving only in cold to moderate temperatures). Like I said earlier, if you just do a pan drain refill you're only going to get out about 1/3 of the fluid. So to do the fluid change properly at 150k you would need to remove a cooler line or use a flush machine to make sure you're getting all the fluid out. Splitting up the fluid changes eliminates this if you want to do your own work. Now even if you aren't going to keep the car until the 150k point there are still benefits to exchanging some of the fluid. Changing the fluid ought to improve the shifting and fuel economy slightly and will be better in the long run for the transmission.

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150k on the fluid is really a best-case scenario (e.g. highway driving only in cold to moderate temperatures). Like I said earlier, if you just do a pan drain refill you're only going to get out about 1/3 of the fluid. So to do the fluid change properly at 150k you would need to remove a cooler line or use a flush machine to make sure you're getting all the fluid out. Splitting up the fluid changes eliminates this if you want to do your own work. Now even if you aren't going to keep the car until the 150k point there are still benefits to exchanging some of the fluid. Changing the fluid ought to improve the shifting and fuel economy slightly and will be better in the long run for the transmission.

 

What about a filter change?

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Also - service intervals are dependent on where you live... Up north here, we go by 48k for trans (30k miles), and 96k for coolant (60k miles). Keep in mind a couple of things - 1) Your engine and transmission are the two most expensive pieces of your car, so you probably want to take care of them and 2) Ford is very much in the business of selling parts, so if you want to wait till 150k miles to do your trans service, and your vehicle is LONG off warranty, be my guest...

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  • 5 years later...

Right from the manual (you have the AISIN F21 transmission)

Motorcraft Premium Automatic Transmission Fluid

XT-8-QAW / WSS-M2C924-A

--

Others here have used the Toyota T-IV fluid

Others here have used Mobil ATF 3309 (the specs/approval list shows WSS-M2C924-A which is what you need) https://mobiloil.com/en/automatic-transmission-fluid/3309-atf

 

I found the Motorcraft version for close to the same price as the T-IV fluid, harder to find Mobil 3309 in less than 6 or 12 bottle cases.

 

 

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The owners manual makes no distinctions between the FWD and AWD versions in terms of fluid requirements.  If you don't have an OM, you can download one here.

 

If you've got noticeable whining in all gears, it usually indicates problems with the transmission pump.  A fluid change will, hopefully, help. 

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Keep in mind also that ambient temperature can definitely effect the sound that your trans makes.  I know that my Fusion's 6F35 trans is not the same as your AISIN trans, but what I say below will likely still apply to your trans..

 

My trans, despite having 267,000 miles on it, is still normally pretty quiet, with just a slight hum during normal operation.  However, with overnight temps in Phoenix dropping down into the low 30's / upper 20's, I've notice that when I go out in the morning to head off to work, the trans has a much more noticeable, fairly loud hum when I first start the car and for about 5-10 minutes, gradually quieting down as it warms up.

 

In your Fusion, is the hum noticeable at all times, or just when it's cold?

 

Otherwise, I agree that if you've never changed the fluid before, a fluid change will hopefully help.

Edited by sirtanon
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Thanks for information on whining possibilities, Mine whines at all times with different pitches at gear change and different speeds. Seems I also have a vibration at idle when in gear. I have considered trans mount as culprit for vibration, will crawl under and visually inspect when I change fluid. Plan to do drain and replace a couple times. I ordered ATF 3309 off amazon today as suggested.

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  • 3 weeks later...
On 6/7/2013 at 7:55 AM, Cobraman302 said:

 

Thank you, sir.

So you are saying you have to pull the Trans out of the vehicle to change the trans filter ? If that is true then that is messed up big time. 

Edited by jerry12
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2 hours ago, jerry12 said:

So you are saying you have to pull the Trans out of the vehicle to change the trans filter ? If that is true then that is messed up big time. 

 

1 hour ago, bangster said:

Pretty common on most modern FWD transmissions. The FNR5 did have a replaceable filter, but the CD4E, AWF21, 6R35/55 all do not.

It's not a regular maintenance item, as pointed out above.  If the trans has to come out for some other reason, then the filter gets changed.  If the filter is clogged, then the trans is toast anyway and it's going to have to come out for repair/replacement.

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