How many guys are still on original transmission fluid? Come on in!

[Alco14]

is there another fluid other then toyota that can be use ? the dealer up here want's an arm and leg for it !!! is there a filter also to be change ?

 

[gtb129]

The only thing I can think is the pressure of the outlet is pushing in the new fluid. So it doesn't have to suck it up because it is still a closed system.

Sent from the drivers seat of my 05 4runner.

That's a good point. I didn't think about the pump pushing, rather than pulling.

So theoretically, if I were to do the bucket meathod, the pump would drain, but not fill. I wander what kind of pressure those lines build... I could probably build a closes pressure PVC pipe system to get the same affect as the thing they used. Hold on and I'll draw my theory out.

@%1; does the pump push rather than pull? Do you know?

Edit:


Pardon the roughness. I did this quickly on my phone. The blue would represent clear lines which could be used to monitor old vs new fluid.

Be gentle. I'm at work, so only so much time to think through this.

 

[Atlanta_man]

Any idea why the fluid level is so critical ? Seems to me that 4runners go long distances up and down hills which would throw off the level in the pan. Some even accelerate and decelerate.

 

[Juppers]

That's a good point. I didn't think about the pump pushing, rather than pulling.

So theoretically, if I were to do the bucket meathod, the pump would drain, but not fill. I wander what kind of pressure those lines build... I could probably build a closes pressure PVC pipe system to get the same affect as the thing they used. Hold on and I'll draw my theory out.

@%1; does the pump push rather than pull? Do you know?

Edit:
View attachment 217988

Pardon the roughness. I did this quickly on my phone. The blue would represent clear lines which could be used to monitor old vs new fluid.

Be gentle. I'm at work, so only so much time to think through this.

You'd need a barrier and a hydraulic fluid of some type between the chambers, the air would just compress in your diagram.

 

[gtb129]

You'd need a barrier and a hydraulic fluid of some type between the chambers, the air would just compress in your diagram.

It is physically impossible to compress air in a closed system. The air would pressurise and force the new fluid into the return line.

Edit: I think you mean the system will decompress somehow, but the whole system would be sealed

 

[Bundutrailer]

Some interesting info here have an 09 which was lightly used has 30k genuine miles wondering if I should flush or a way to do a thorough pre-check.

 

[gm350reratliff]

That's a good point. I didn't think about the pump pushing, rather than pulling.

So theoretically, if I were to do the bucket meathod, the pump would drain, but not fill. I wander what kind of pressure those lines build... I could probably build a closes pressure PVC pipe system to get the same affect as the thing they used. Hold on and I'll draw my theory out.

@%1; does the pump push rather than pull? Do you know?

Edit:
View attachment 217988

Pardon the roughness. I did this quickly on my phone. The blue would represent clear lines which could be used to monitor old vs new fluid.

Be gentle. I'm at work, so only so much time to think through this.

You'd need a barrier and a hydraulic fluid of some type between the chambers, the air would just compress in your diagram.

It is physically impossible to compress air in a closed system. The air would pressurise and force the new fluid into the return line.

Edit: I think you mean the system will decompress somehow, but the whole system would be sealed

It is absolutely possible to compress air in a sealed system although, what you drew may work depending on how much resistance the new fluid encounters while being pushed into the transmission. A hydraulic/hydraulic setup that uses a floating piston like that earlier pic would be ideal as there is no way to compress a liquid such as ATF, so what you put in is what you get out.

 

[07V8]

It is absolutely possible to compress air in a sealed system although, what you drew may work depending on how much resistance the new fluid encounters while being pushed into the transmission. A hydraulic/hydraulic setup that uses a floating piston like that earlier pic would be ideal as there is no way to compress a liquid such as ATF, so what you put in is what you get out.

Except that the transmission and associated cooling lines are NOT liquid full. You cannot guarantee you're replacing equal amounts.

 

[gm350reratliff]

Except that the transmission and associated cooling lines are NOT liquid full. You cannot guarantee you're replacing equal amounts.

If they're not liquid filled, what's in them? If you use two cylinders that were both marked, you should be able to tell how much is coming out vs. how much is being pushed back in. Of course you would want to verify the level using the temp check method and add or drain as needed.

 

[5vzT4R]

Was having issue's with my trans, 220k miles, and I went in and had a full flush done. The old fluid was brown and sludge! All my issue's have gone away now and it shifts like new! Wish I had done it when I first bought the truck, but I just didn't think of it. New fluid on top, old crappy stuff on bottom!
<a data-flickr-embed="true" href="https://www.flickr.com/photos/132186222@N08/28963647370/in/datetaken/" title="20160826_165942"><img src="https://c3.staticflickr.com/9/8024/28963647370_48ca4e720d_z.jpg" width="480" height="640" alt="20160826_165942"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

Any idea what kind of machine was used to flush your transmission? Did the machine "force" the new fluid in the transmission, or did it use the transmission to suck in new fluid? Also was this at a Toyota dealer, or a independent shop? Still on the fence as to full flush, or repeated drain and fills on mine.

 

[t-man]

Any idea what kind of machine was used to flush your transmission? Did the machine "force" the new fluid in the transmission, or did it use the transmission to suck in new fluid? Also was this at a Toyota dealer, or a independent shop? Still on the fence as to full flush, or repeated drain and fills on mine.

It was an independent oil change shop. You'll never see me touch a stealership outside of warranty work that I deem necessary. I've worked for two different dealerships and very few mechanics, 2 out of 30 in my experiences, knew more than I do. (side note, I was extremely interested in trucks growing up and worked with my uncle, a master auto and diesel mechanic, for quite a few years and I have always done my own work)
The machine is just a clear tube with a piston seal that separates the old and new liquid. A tube comes out if the top and bottom and are hooked up to the Transmission lines. New fluid from top, old fluid goes in the bottom. Then you start the truck and basically it doesn't know it's there. As the fluid transfers naturally through the cooling lines it pulls in the new fluid.
Transfer pumps that push the fluid themselves are not good. They can damage your transmission by forcing fluid through unopened solenoids and things like that. I tried to find pictures online of what they used but have been unable to find anything. Maybe next time I'm around there I'll stop and get info on it.

Sent from the drivers seat of my 05 4runner.

 

[gtb129]

It is absolutely possible to compress air in a sealed system although, what you drew may work depending on how much resistance the new fluid encounters while being pushed into the transmission. A hydraulic/hydraulic setup that uses a floating piston like that earlier pic would be ideal as there is no way to compress a liquid such as ATF, so what you put in is what you get out.

Okay, I've slept, and my head is much clearer. 12 hour night in a busy hospital tends to distract you. You're right.. air will absolutely compress in a closed system. However, the air would compress to the appropriate PSI, and eventually start forcing fluid in. I would just need to be sure that I incorporated some kind of check system to be sure all of the new fluid was pushed in.

Except that the transmission and associated cooling lines are NOT liquid full. You cannot guarantee you're replacing equal amounts.

You should be a bit more descriptive. I don't want to undermine what you're saying, or come off condescending, but what I've read says otherwise.

If they're not liquid filled, what's in them? If you use two cylinders that were both marked, you should be able to tell how much is coming out vs. how much is being pushed back in. Of course you would want to verify the level using the temp check method and add or drain as needed.

The cylinders would need to be connected to create the pressure needed to push the new fluid in, but otherwise I couldn't agree more.

Can anyone else confirm that the pump PUSHES fluid to the transmission cooler, as opposed to pulling FROM the cooler?

 

[jfry008]

Can anyone else confirm that the pump PUSHES fluid to the transmission cooler, as opposed to pulling FROM the cooler?

Everyone that used the method below can confirm (including me):
http://www.toyota-4runner.org/4th-gen-t4rs/195074-atf-exchange-using-cooling-line.html

 

[BackOff]

I change mine out every other year.


Nah, just kidding.

I did mine at 60k drained and refilled with Royal Purple, 10k later no issues.
Think I may do it again at 90k just for the fun of it.

 

[TrueBlue]

315k on Factory Fluid, hasn't been touched. So far so good, hopefully it stays that way.


Sent from my SM-G935V using Tapatalk

 

[Champ306]

203 on mine. All good.

 

[SacNorCal]

05 sport 4wd with 255k. No problems with the original fluid. It runs like a champ.

 

[nevada]

I think BlackWorksInc said this, and I may be paraphrasing, but it makes sense one way or the other - to us, "lifetime" means as long as the vehicle lasts. To the manufacturer, it means the time they're responsible to fix it if something goes wrong.

agreed.

Then there's this quote from "They Convince You They Use A Lifetime Fluid!", which is the very first item on this list titled Eight Ways Automakers Make Cars Obsolete: When automakers use the term "lifetime" to describe their engine coolant and transmission fluids, they strictly mean the lifetime of their warranty.

Finally, we must always consider the potential consequences, which in this case is transmission malfunction or failure. I'll take the most conservative approach to preventing that and just change the fluid.

yep. I was just coming in here to say just that.

I have some documentation from Toyota(from a different vehicle) that fairly clearly spells out that lifetime in that particular sense, means 100,000 miles.

 

[BackOff]

Haynes repair manual.

Every 30k or 24 months, whichever comes first.

Replace spark plugs.
Service cooling system. (drain, flush, and refill)
Change automatic transmission fluid and filter.
Change the cabin air filter.
Change the transfer case lubricant.
Change the differential lubricant.

Were if any 'Life time' are mentioned...nope.

Terrible marketing ploy.

 

[luke87gt]

Haynes repair manual.

Haynes is the joke of the automotive world...