DIY CVT Fluid Flush through the Front Transmission Cooler

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Wax95
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DIY CVT Fluid Flush through the Front Transmission Cooler

Postby Wax95 » Thu Jul 01, 2021 7:08 pm

Hello All!

New here at the forum and it has been a HUGE help for me with regards to maintaining my 2013 Nissan Rogue SV AWD. I just signed up and posted right away cause….

I am planning on (DIY) flushing the tranny fluid through the return hose on the front transmission cooler. Been searching for 2 weeks now if this is possible on said SUV but I cannot find anything with regards to this.

Would really appreciate a reply, feedback, opinions, etc etc about this!


localTradey
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby localTradey » Thu Jul 01, 2021 7:54 pm

unless you have a machine that is designed to flush, no matter what you do, there will still be at least half the fluid left.
So why take the trouble to dot hat?
Better to drain and fill at 1000k interval 2 or 3 times and you get most of the fluid replaced.

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VStar650CL
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby VStar650CL » Thu Jul 01, 2021 7:55 pm

You can flush through the cooler lines as long as you respect the flow direction, back-flushing isn't advisable because you're forcing fluid backward through the pump. However, unless your fluid is badly burnt or contaminated, any flushing isn't necessarily a good idea. CVT's don't make "ATF soup" like a conventional tranny because they have very limited clutch material. The little trash they do produce tends to wind up in the bottom of the pan, and flushing can just stir it up instead of eliminating it. If the fluid is reasonably healthy, you'll be better served to drop the pan while the tranny is cold and simply clean it out. As mentioned elsewhere in these forums, don't overfill when you replenish it. Overfilling by even a small amount is the #1 CVT-killer.

localTradey
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby localTradey » Thu Jul 01, 2021 8:01 pm

btw. I did by extract and fill last Saturday.
I used a clip to remove the cap. I insert it from underneath. took me 4 seconds but requires precision at inserting the clip.
Since then I drill a hole on the side of the cap and the next time it will take me 1 second to remove the cap , using a small screwdriver!
Just insert screwdriver and pull.
not sure how to insert an image here.

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VStar650CL
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby VStar650CL » Thu Jul 01, 2021 8:04 pm

localTradey wrote:
Thu Jul 01, 2021 8:01 pm
Since then I drill a hole on the side of the cap and the next time it will take me 1 second to remove the cap , using a small screwdriver!
+1, nothing wrong with busting that silly cap lock. The caps are sticky enough without it. Even us professionals hate 'em.

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casperfun
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby casperfun » Thu Jul 01, 2021 8:42 pm

Turn 180 degrees. Boom. The end. :inoutgay:

Wax95
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby Wax95 » Fri Jul 02, 2021 12:56 am

VStar650CL wrote:
Thu Jul 01, 2021 7:55 pm
You can flush through the cooler lines as long as you respect the flow direction, back-flushing isn't advisable because you're forcing fluid backward through the pump. However, unless your fluid is badly burnt or contaminated, any flushing isn't necessarily a good idea. CVT's don't make "ATF soup" like a conventional tranny because they have very limited clutch material. The little trash they do produce tends to wind up in the bottom of the pan, and flushing can just stir it up instead of eliminating it. If the fluid is reasonably healthy, you'll be better served to drop the pan while the tranny is cold and simply clean it out. As mentioned elsewhere in these forums, don't overfill when you replenish it. Overfilling by even a small amount is the #1 CVT-killer.

I’m planning on doing this one https://youtu.be/GIuraMjpt0k thru the blue flow by attaching a hose from the the oil cooler straight to a jug then attaching a pump from the jug with new oil to the hose going to the transmission. Btw fluid is healthy just wanted to change the fluid in my suv from the nissan cvt to the idemitsu cvt type n
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Last edited by Wax95 on Fri Jul 02, 2021 1:01 am, edited 1 time in total.

Wax95
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby Wax95 » Fri Jul 02, 2021 12:58 am

localTradey wrote:
Thu Jul 01, 2021 7:54 pm
unless you have a machine that is designed to flush, no matter what you do, there will still be at least half the fluid left.
So why take the trouble to dot hat?
Better to drain and fill at 1000k interval 2 or 3 times and you get most of the fluid replaced.
Was thinking about this one as well but what about this? What say you? https://youtu.be/GIuraMjpt0k

D1dad
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby D1dad » Fri Jul 02, 2021 4:02 am

I say get yourself 12 quarts and do a pan drop first then back to back drain and fills. I’m not familiar with the 13 model but my 09 on ramps takes exactly 4 qts and my 18 has the leveling port which spits out around 6 ounces of the 4 qts I dump in. The only time I I ever did a tranny flush was with an 04 Taurus and the trans was toast within a few months. I know the cvt isn’t a Taurus tranny but replenishing the modifiers and getting the crap out is the same on all trannys. Clean and accurate fill is key to cvt longevity.

localTradey
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby localTradey » Fri Jul 02, 2021 4:08 am

I saw the video on DIY flush on the Murano.
Let me give an example. You have a 4 bedroom house - with SPAM dining etc.
The house is filled with brown smoke (old oil). You open the front and back door. You blow in blue smoke (new oil) from the front door.
You wait by the back door, Initially you see the brown smoke coming out , being pushed out by the blue smoke. Eventually, blue smoke comes out and you stop the process.
Have you replaced all the brown smoke? There will be brown smoke in the bedrooms, dining etc since the smoke takes the easiest way out the back.

So similar with the video, I cannot tell if the flush goes from one end to the other end and pushes all fluid in between.

Similarly, if you drain and fill and without driving, drain and fill again. You may have replaced gallons of fluid but you have replaced all the new oil the second time since there some old oil located in other areas of the transmission.
So the video shows many gallons of oil being replaced, but you cannot tell if all the replaced oil are old oil. it could have just replaced oil from the pan, unless you know how the oil is flowing within the transmission during the "flush".

Wax95
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby Wax95 » Fri Jul 02, 2021 6:34 am

D1dad wrote:
Fri Jul 02, 2021 4:02 am
I say get yourself 12 quarts and do a pan drop first then back to back drain and fills. I’m not familiar with the 13 model but my 09 on ramps takes exactly 4 qts and my 18 has the leveling port which spits out around 6 ounces of the 4 qts I dump in. The only time I I ever did a tranny flush was with an 04 Taurus and the trans was toast within a few months. I know the cvt isn’t a Taurus tranny but replenishing the modifiers and getting the crap out is the same on all trannys. Clean and accurate fill is key to cvt longevity.
Yeah. Thats what I would think so too “clean and accurate fill”

Wax95
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby Wax95 » Fri Jul 02, 2021 6:36 am

localTradey wrote:
Fri Jul 02, 2021 4:08 am
I saw the video on DIY flush on the Murano.
Let me give an example. You have a 4 bedroom house - with SPAM dining etc.
The house is filled with brown smoke (old oil). You open the front and back door. You blow in blue smoke (new oil) from the front door.
You wait by the back door, Initially you see the brown smoke coming out , being pushed out by the blue smoke. Eventually, blue smoke comes out and you stop the process.
Have you replaced all the brown smoke? There will be brown smoke in the bedrooms, dining etc since the smoke takes the easiest way out the back.

So similar with the video, I cannot tell if the flush goes from one end to the other end and pushes all fluid in between.

Similarly, if you drain and fill and without driving, drain and fill again. You may have replaced gallons of fluid but you have replaced all the new oil the second time since there some old oil located in other areas of the transmission.
So the video shows many gallons of oil being replaced, but you cannot tell if all the replaced oil are old oil. it could have just replaced oil from the pan, unless you know how the oil is flowing within the transmission during the "flush".
True enough, I do not know how the flow is inside. Thank you!!! Appreciate it a lot!!!

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VStar650CL
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby VStar650CL » Fri Jul 02, 2021 7:05 am

D1dad wrote:
Fri Jul 02, 2021 4:02 am
I say get yourself 12 quarts and do a pan drop first then back to back drain and fills. I’m not familiar with the 13 model but my 09 on ramps takes exactly 4 qts and my 18 has the leveling port which spits out around 6 ounces of the 4 qts I dump in. The only time I I ever did a tranny flush was with an 04 Taurus and the trans was toast within a few months. I know the cvt isn’t a Taurus tranny but replenishing the modifiers and getting the crap out is the same on all trannys. Clean and accurate fill is key to cvt longevity.
+1. You'll never get the last of it out of the torque converter even with a power flush. One pan drop and several D&F's is the way to go.

localTradey
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby localTradey » Fri Jul 02, 2021 5:39 pm

casperfun wrote:
Thu Jul 01, 2021 8:42 pm
Turn 180 degrees. Boom. The end. :inoutgay:
Turning the cap 180 degrees may have a risk of the cap being dislodge. During hot days and hard drive, the metal pipe expands and there is a chance the cap may pop off when it is loose or when you go over a bump.
The engine oil dipstick actually has a dipstick which stays in place even if the cap is loose.

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casperfun
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby casperfun » Fri Jul 02, 2021 9:54 pm

I’ve haven’t had a problem for 27k miles or the last 4 years that way. So I’ve been ok so far.

It’s just a pain in the a$$ to remove the transmission dipstick. It could either take 5 secs or 5 min.

So I kept it unlock at first to check the levels but then I decided that I will never lock it ever since. :bigthumb:

D1dad
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Re: DIY CVT Fluid Flush through the Front Transmission Cooler

Postby D1dad » Sun Jul 04, 2021 5:13 am

That cap isn’t going anywhere if it’s turned backwards. I broke the tab off on my 09 years ago. If anything during hot runs the cap gets tighter. Whenever I service our 18 the cap is the hardest part of the whole job. When the warranty is up I’m snapping the tab off the plug.


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