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Transmission flush? Good or bad? #4439947
06/23/17 10:30 PM
06/23/17 10:30 PM
Joined: Jun 2012
Posts: 524
Atlantic, Canada
wolf_06 Offline OP
wolf_06  Offline OP
Joined: Jun 2012
Posts: 524
Atlantic, Canada
Hi,

I have a 2011 chevy cruze with the 6 speed auto. I have 140,000 km on it.

I think its time to change the transmission fluid.

Any of you who recommends a flush? Or just drain and fill with a full synthetic?

Thanks


2011 Chevy Cruze 1.8L 6AT
Castrol Magnatec syn blend 5w30, NAPA filter.
Re: Transmission flush? Good or bad? [Re: wolf_06] #4439954
06/23/17 10:41 PM
06/23/17 10:41 PM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
If by flush you mean pay the nice man with the expensive pump that hooks up to the transmission cooler lines, that replaces almost all the fluid. A drain and fill gets about half. Depends on how much money you want to spend. A couple of drain and fills with some driving between them will get most of the old fluid out.


2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30
Re: Transmission flush? Good or bad? [Re: wolf_06] #4439964
06/23/17 10:59 PM
06/23/17 10:59 PM
Joined: Jul 2005
Posts: 30,442
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,442
NY
I'd do a pan drop filter change and line exchange of the fluid, or a pan drop filter change, with a few fluid extractions. I wouldn't pay for a "line flush" and hope they use the right fluid and do the job right. SilverFushion2010's idea will work too.


God Bless Our Troops

Re: Transmission flush? Good or bad? [Re: wolf_06] #4439965
06/23/17 11:05 PM
06/23/17 11:05 PM
Joined: Oct 2014
Posts: 3,902
Utah
CKN Offline
CKN  Offline
Joined: Oct 2014
Posts: 3,902
Utah
A "flush" is usually taking out the old fluid and putting in new fluid. Most dealers perform a "flush" as standard service and do not drop the pan. It's usually done through the transmission cooler line.


If one wants to mess up their driveway you can do the same thing using a bucket and some rubber line.

Last edited by CKN; 06/23/17 11:07 PM.
Re: Transmission flush? Good or bad? [Re: wolf_06] #4439976
06/23/17 11:16 PM
06/23/17 11:16 PM
Joined: Oct 2014
Posts: 2,410
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,410
San Antonio, TX

Flush or pan drop, I'd use a licensed ATF for the application, which I'm guessing is Dexron VI in your application.

Member merconvvv here has posted personal doubts whether the Dexron VI specification allows a full synthetic formulation. Personally, I doubt the licensing authority would allow licensed fluids to advertise as full synthetic if the formulation didn't allow that. Dunno what you have available where you're at but if you stick yo a licensed fluid it shouldn't be a problem.

If you pay someone else to change your ATF there should be a good discussion up front on what fluid will be used. There are shops who only stock a few basic ATF variants then add stuff as top treat to supposedly convert what they just filled yourtransmission with to an equivalent fill of the manufacturer's specified ATF. I've never had a transmission flushed, and that's one of my reasons.

https://drive.google.com/file/d/0Bz2NTEAdC4vxYnE3aFFQbUhESjA/view?usp=drivesdk


"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen
Re: Transmission flush? Good or bad? [Re: wolf_06] #4439979
06/23/17 11:17 PM
06/23/17 11:17 PM
Joined: Mar 2008
Posts: 6,834
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,834
USA
Just drain and fill with any licensed Dexron VI smile

Re: Transmission flush? Good or bad? [Re: wolf_06] #4439995
06/23/17 11:59 PM
06/23/17 11:59 PM
Joined: Feb 2017
Posts: 172
Vancouver, Canada
dubber09 Offline
dubber09  Offline
Joined: Feb 2017
Posts: 172
Vancouver, Canada
IMHO, at 140K km you are waaaay over due.
Do a drain and fill at this point. Do another D/F 30K km later.

I did a 'flush' in my driveway, evacuated ATF left in torque converter thru cooler line (at 50K km), not a drop on cement.

Re: Transmission flush? Good or bad? [Re: dubber09] #4440001
06/24/17 12:36 AM
06/24/17 12:36 AM
Joined: Sep 2010
Posts: 7,001
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,001
Texas
Hope that is not the first - if it has the 11mm drain plug - dump and measure - on my ramps - get 4/9 quarts (gallon) - when you see the fluid - think you will be encouraged to do it again real soon ...
If the same set up - really easy but the filter might be inside the case and not accessible ...

Re: Transmission flush? Good or bad? [Re: demarpaint] #4440011
06/24/17 01:52 AM
06/24/17 01:52 AM
Joined: Sep 2014
Posts: 1,423
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,423
Seattle-ish, WA
Originally Posted By: demarpaint
I'd do a pan drop filter change and line exchange of the fluid, or a pan drop filter change, with a few fluid extractions. I wouldn't pay for a "line flush" and hope they use the right fluid and do the job right. SilverFushion2010's idea will work too.


+1, best reply. At that mileage, cleaning the pan out would be good to get material that has fallen out of suspension and not load up the new fluid immediately. However, it may not be that simple if you are planning on doing it yourself. It may not be as simple on this car.

My mother has an 07 Equinox and this was my plan, but I found the transmission placement and cooler lines were difficultly placed and had odd hose attachments; a fluid swap was not practical. At 100k (miles), I just drained and filled (MaxLife), and the transmission performance change was dramatically improved. Different transmission than yours, but similar layout and hardware is why I mention this.

If your cooler hoses are easily accessibly and do not have pipe fittings on the end, a swap can be doen at home cleanly. One method is to split open some large trash/leaf bags and lay around as a mat, and keep shop towels or paper towels around in abundance. It does not mean staining driveways if you think and plan ahead a little and go slowly.

Re: Transmission flush? Good or bad? [Re: wolf_06] #4440057
06/24/17 05:19 AM
06/24/17 05:19 AM
Joined: Sep 2013
Posts: 10,454
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,454
Indiana
I say cooler line flush. Get all the old out.


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

Re: Transmission flush? Good or bad? [Re: wolf_06] #4440085
06/24/17 06:48 AM
06/24/17 06:48 AM
Joined: Dec 2004
Posts: 1,017
Florida /Texas
Mackelroy Offline
Mackelroy  Offline
Joined: Dec 2004
Posts: 1,017
Florida /Texas
As long as your tranny is working , Id just do a drain and fill. Then pan may only hold a few quarts, where the whole system will have 3 times the amount. Its nice if you have a drain bolt on the pan. Just drain and measure, re add. Do again 100 mile later, two or 3 times.

Many shops refuse to do a flush on a vehicle over 100,000 miles(without history of prior refills), too high of risk that a flush it will screw it up.

Don't worry about the synthetic [censored], just use a correctly spec'd standard fluid.

Last edited by Mackelroy; 06/24/17 06:51 AM.
Re: Transmission flush? Good or bad? [Re: wolf_06] #4440091
06/24/17 07:01 AM
06/24/17 07:01 AM
Joined: Dec 2013
Posts: 2,088
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,088
socal
I would drop the pan, replace filter, do a trans cooler line fluid replace (Dex vi) until all old fluid is gone, then call it good. At that point, you can do drain and fill at whatever interval u like best. Perhaps 60k


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Transmission flush? Good or bad? [Re: wolf_06] #4440092
06/24/17 07:05 AM
06/24/17 07:05 AM
Joined: Oct 2008
Posts: 19,091
Sunny Florida
SteveSRT8 Offline
SteveSRT8  Offline
Joined: Oct 2008
Posts: 19,091
Sunny Florida
No such thing as a "flush", the "machines" are nothing but bladders and waste tanks. How do I know? I used to own one from B&G. Once I saw what they really are a bucket is all I needed after that.

You must drop the pan and change the filter first. After everything is cleaned up consider a fluid exchange right in the driveway to completely change over to new fluid.


"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix
Re: Transmission flush? Good or bad? [Re: barkingspider] #4440093
06/24/17 07:06 AM
06/24/17 07:06 AM
Joined: Sep 2010
Posts: 7,001
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,001
Texas
Does that year model actually have a "pan" or just split aluminum case? (With drain plug).

Re: Transmission flush? Good or bad? [Re: wolf_06] #4440112
06/24/17 07:59 AM
06/24/17 07:59 AM
Joined: Dec 2004
Posts: 1,017
Florida /Texas
Mackelroy Offline
Mackelroy  Offline
Joined: Dec 2004
Posts: 1,017
Florida /Texas
The tranny flush is about $200 , I took my wifes Rv4 with 120,000 miles to Firestone(vehicle ran fine), they wouldn't touch the tranny oil with that mileage. Then went to a Ammco(specialized tranny place), they wouldn't touch it either, said tranny was full of debri, said just run it, till death. That didn't really work for me, I might as well trade the vehicle.

Then I called Toyota to do it, and they said we might refuse it too.

Screw them all, and they actually did me a favor. I bought the oil, $30, drained, the oil was discolored, but there was no heavy fiber debri like Amsoil said. (they just didn't want to mess with it, cause they already had a rav 4 in the shop with tranny ecm issues.

The pan was super easy to drain, don't even have to jack the vehicle up, poured out the waste container, totally clean. I repeted this procedure 3 times over the next couple of weeks. Actually easier than changing the regular oil.

So all these shops saved me a lot of money, 30,000 miles later everything working fine, and I don't have to rid the vehicle.

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