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Replacing ATF: How Many Miles Between Drain And Fills? #5241420 10/16/19 01:35 PM
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kc27 Offline OP
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I am going to do the "multiple drain and fill method" to change the automatic transmission fluid (ATF) on a 2009 Toyota Rav4 (2.5L four cylinder engine/four speed transmission) with 110,000 miles on it. As far as I know, the ATF has never been changed on this vehicle. The fluid looks a little dark, but does not smell burnt.

The plan is to drain and fill the transmission three times. The first two times, drain the ATF through the transmission drain plug, the third time drain the fluid, and also remove the pan and change the automatic transmission filter.

When changing the transmission fluid with this method, how many miles does one put on the car between the drain and fills? Is there a number of miles you should not exceed between the drain and fills?

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241428 10/16/19 01:43 PM
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JLTD Offline
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"MIles to exceed"? No. I'd drop the pan the first time, then go around 5,000 miles for the rest of the changes.


I use the overseas manual to choose my viscosity.

Using AMSOIL

Hers: 2008 Jeep Liberty 154k, SS 5w30/Amsoil

His: 2015 4Runner 60k, SS 5w20/Amsoil

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241432 10/16/19 01:45 PM
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SubieRubyRoo Offline
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Per Honda instructions on D&Fs, I would drain & fill, drive about 3 miles getting the trans thru all gears, then go back and repeat. I did it four times per Honda instructions the first time I serviced that trans, and then after that I just started draining one gallon every 15k miles and replacing it. I figured the first 4x change got around 90% of the old fluid out, and changing one gallon every other OCI just keeps it fresh.

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241442 10/16/19 01:48 PM
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Yah-Tah-Hey Offline
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After doing multiple drains on my 04 Camry in 08, I drain/refill AT every spring and ATF stays looking/smelling new. I can drain out four quarts if I raise vehicle with jack stands. Works for me

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241446 10/16/19 01:50 PM
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hallstevenson Offline
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Do what works best for you or is convenient. If that means drain and refill, go for a 15-30 minute drive and repeat, do that. If it means do them a week apart or a month apart, do that. There is no "right" answer to this.

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241459 10/16/19 01:59 PM
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bubbatime Offline
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Dont bother dropping the pan.


2019 Honda CRV 1.5T factory bulk
2017 Chrysler Pacifica SuperTech synthetic 5W20
2013 Yamaha XT250 Valvoline motorcycle 10W40
2006 GMC Sierra SuperTech high mileage 5W30

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241466 10/16/19 02:07 PM
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millerbl00 Offline
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Change filter first then two more fluid changes

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241470 10/16/19 02:10 PM
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kc27 Offline OP
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I have an upcoming 1000 mile road trip. I was going to do the first drain and fill, before the trip. That's why I was asking if there was a number of miles that should not be exceeded between the drain and fills. I only have time before the road trip to do a simple drain via the drain plug. If it is preferable to change the automatic transmission filter with the first drain and fill, as JLTD advised, I will start the fluid change process after the road trip. Note to Bubba: I thought besides changing the filter, dropping the pan was an opportunity to clean off metal debris from the pan magnets.

Last edited by kc27; 10/16/19 02:14 PM.
Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241486 10/16/19 02:21 PM
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demarpaint Offline
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You could drive around the block if you like. Getting it through all the gears would be nice. Some units only have to be run through all the gears without even driving the car to circulate the ATF. In other words, shift from Park to Reverse, to Neutral, D, 2, 1. The pump is mixing the ATF as it gets pumped through the unit.


God Bless Our Troops

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: demarpaint] #5241522 10/16/19 02:51 PM
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hallstevenson Offline
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Honda has a "tech document" that tells their technicians to simply run it through gears while it's still on the hoist/lift. I don't think it involves more than a few minutes of "driving".

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241530 10/16/19 02:58 PM
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Mr Nice Offline
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On our Hondas I did 30K mile drain and refills.

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241542 10/16/19 03:14 PM
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kc27 Offline OP
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OK, thanks. I will do the ATF changes after the 1000 mile road trip.

Does it matter if the filter is changed with the first change or the final one?

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: hallstevenson] #5241549 10/16/19 03:22 PM
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demarpaint Offline
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Originally Posted by hallstevenson
Honda has a "tech document" that tells their technicians to simply run it through gears while it's still on the hoist/lift. I don't think it involves more than a few minutes of "driving".

Exactly.


God Bless Our Troops

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241550 10/16/19 03:22 PM
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Dave1027 Offline
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Or just replace all the fluid at once using the ATF cooler lines going to the radiator.

Re: Replacing ATF: How Many Miles Between Drain And Fills? [Re: kc27] #5241551 10/16/19 03:23 PM
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F_150_18 Offline
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Originally Posted by kc27
OK, thanks. I will do the ATF changes after the 1000 mile road trip.

Does it matter if the filter is changed with the first change or the final one?


It probably good to go ahead and get that old filter out of there. Its probably extremely dirty at that mileage. While you have pan off make sure you clean the magnet.

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