Mustang 11+ 6R80 transmission fluid change (Auto) - Mustang Evolution

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Old 01-09-2016, 10:56 AM   #1
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Mustang 11+ 6R80 transmission fluid change (Auto)

Because I'm going to be doing this next weekend and saw no real information regarding this, I figured I would post up some good info. There seems to be a lot of misinformation regarding the 6R80 transmission and fluid changes. As you will see by the Ford tech in the video, you want to AVOID having the transmission flushed. Getting it flushed doesn't do much of anything because of the check valve. The transmission has to be running at operating temp to open, which isn't the case during fluid changes. You end up just flushing the lines only and wasting good fluid. The only real way is to drop the pan, drain, refill. Repeat if you've waited longer than 50k, but if doing it at 30ish you should be fine just refilling and replacing with a new filter.
Some key points when doing the change:
*When dropping pan make sure to leave two front bolts and two mid bolts attached so you don't get a face full of pan/fluid.
*Metal cap for dip stick is 19mm/3/4".
*When changing out filter, make sure to check filter neck o-ring didn't get stuck/left in transmission (similar to oil filter gasket being stuck in housing).
*Gasket can be reused, clean with old transmission fluid, avoid using cleaners/brake cleaner.
*Most important, check on level surface at operating temp. Otherwise, follow procedure in video and fill to bottom hash mark.
Videos:
Fluid Change:

Fluid Check & fill:


Again, the vehicle being used is an F-150, but the 6R80 transmission is the same.
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Old 01-09-2016, 12:18 PM   #2
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Also good resources: Ford Service Manuals - GENERAL PROCEDURES

The service manuals are located on the left hand side.
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Old 01-14-2016, 11:31 AM   #3
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I thought you couldn't drop the pan on my 2011 3.7? Thought you only could do a flush

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Old 01-14-2016, 11:39 AM   #4
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What transmission oil should I use to have it refilled and how much does it take

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Old 01-14-2016, 03:09 PM   #5
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We'll, juat picked up the transmission filter from Napa. Around 62 dollars.



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Old 01-14-2016, 07:08 PM   #6
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Uhhhhhh.....Ford Mustang Automatic Transmission Filter FT188 (15-16 EcoBoost, V6, GT) - Free Shipping

The pan gasket is reusable. Just clean with some clean ATF and a rag.

Also, go with the LV Motorcraft fluid here: Amazon.com: Genuine Ford Fluid XT-10-QLVC MERCON-LV Automatic Transmission Fluid - 1 Quart: Automotive

You could probably find it cheaper at a dealer. I've seen it between $6 and $10.
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Old 01-14-2016, 07:51 PM   #7
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The pan gasket came with the filter. I just asked for the filter and that's what they had.

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Old 01-14-2016, 07:53 PM   #8
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Quote:
Originally Posted by paintmann111 View Post
Uhhhhhh.....Ford Mustang Automatic Transmission Filter FT188 (15-16 EcoBoost, V6, GT) - Free Shipping

The pan gasket is reusable. Just clean with some clean ATF and a rag.

Also, go with the LV Motorcraft fluid here: Amazon.com: Genuine Ford Fluid XT-10-QLVC MERCON-LV Automatic Transmission Fluid - 1 Quart: Automotive

You could probably find it cheaper at a dealer. I've seen it between $6 and $10.
The pan gasket came with the filter. I just asked for the transmission filter and that's the one Napa had for our transmission. How many quarts does it take? Napa does make good parts!

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Old 01-15-2016, 07:06 AM   #9
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I ran the snot out of my automatic on weekends at a local airport strip. Because of this, I had my local trustworthy transmission shop do the low pressure fluid flush. Most non-transmission shop mechanics steer away from flushing due to the older style, and how it was performed; they used to use a high pressure flush that would dislodge gunk in transmissions with high mileage that were never flushed, or flushed at high mileage that finally developed trouble.
The newer low pressure flushes are safe, and very effective in removing 99% of the transmission fluid. Doing just a pan drop and filter change is alright, but it only gets about 35% of the automatic transmission fluid changed. The remaining fluid is in the torque converter, lines, and transmission cooler (radiator). Think of it like this: would you remove just 2 to 3 quarts of your engine oil, then replace that, and call it an oil change?
For me, I was hard on the Mustang, so it got full flushes (every 30K). I've been doing this in all my vehicles, especially my F150's that see or saw extreme duty with towing. I'm on my third truck; each one got me over 250K of trouble free automatic transmission miles. My current truck is at 127K, and has had its 4th transmission flush. And with any vehicle that's equipped with an automatic that sees hard use (racing or towing), an automatic transmission oil cooler is a must have.
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Old 01-15-2016, 07:34 AM   #10
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When I do the fluid on my truck I let it "flush" itself out. Takes 2 or 3 ppl and a 6 pack for the actual flush part.


-Drop pan, drain fluid, change filter, put pan back on.
-Throw 7 qts of ATF into the pan
-Remove the trans cooler supply line and throw it in a 5 gallon bucket
-Chock the wheels, have someone on the brakes and start up and put in D
-Start adding fresh fluid as the old dark fluid shoots into the bucket
-Keep adding fluid steadily till the fluid going into the bucket is clean
-Button everything back up and proceed to finish topping the system off as you would normally.


Do this every 30-40k to my Expy and its now at 140k miles and the trans still shifts like a brand new one. *knocks on wood x1000*.
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Old 01-15-2016, 07:39 AM   #11
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Quote:
Originally Posted by scottydsntknow View Post
When I do the fluid on my truck I let it "flush" itself out. Takes 2 or 3 ppl and a 6 pack for the actual flush part.


-Drop pan, drain fluid, change filter, put pan back on.
-Throw 7 qts of ATF into the pan
-Remove the trans cooler supply line and throw it in a 5 gallon bucket
-Chock the wheels, have someone on the brakes and start up and put in D
-Start adding fresh fluid as the old dark fluid shoots into the bucket
-Keep adding fluid steadily till the fluid going into the bucket is clean
-Button everything back up and proceed to finish topping the system off as you would normally.


Do this every 30-40k to my Expy and its now at 140k miles and the trans still shifts like a brand new one. *knocks on wood x1000*.
What you are describing is a low pressure flush! Using the transmissions pump to expel the fluid into a container...
What a transmission shop will do (good ones using a low pressure machine) is connect the return line to a tank containing fresh new fluid.
You're method is a good one, if you follow it and NOT ALLOW the transmissions oil pan to empty, and as you state, steadily keep adding in fluid; the transmission pump can push the fluid out within a minute. Don't want to operate an automatic very long dry (no/low oil).
Problem with the newer Mustangs automatic transmission is that the fill plug/tube is hard to get to; snuggled at the base of the transmission/pan area.
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Old 01-15-2016, 08:38 AM   #12
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I just called AAMCO and they told me today's flushes are all low pressure. The modern day machines no longer use high pressure they use low pressure.

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Old 01-15-2016, 08:54 AM   #13
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Quote:
Originally Posted by bucko View Post
I ran the snot out of my automatic on weekends at a local airport strip. Because of this, I had my local trustworthy transmission shop do the low pressure fluid flush. Most non-transmission shop mechanics steer away from flushing due to the older style, and how it was performed; they used to use a high pressure flush that would dislodge gunk in transmissions with high mileage that were never flushed, or flushed at high mileage that finally developed trouble.
The newer low pressure flushes are safe, and very effective in removing 99% of the transmission fluid. Doing just a pan drop and filter change is alright, but it only gets about 35% of the automatic transmission fluid changed. The remaining fluid is in the torque converter, lines, and transmission cooler (radiator). Think of it like this: would you remove just 2 to 3 quarts of your engine oil, then replace that, and call it an oil change?
For me, I was hard on the Mustang, so it got full flushes (every 30K). I've been doing this in all my vehicles, especially my F150's that see or saw extreme duty with towing. I'm on my third truck; each one got me over 250K of trouble free automatic transmission miles. My current truck is at 127K, and has had its 4th transmission flush. And with any vehicle that's equipped with an automatic that sees hard use (racing or towing), an automatic transmission oil cooler is a must have.
Great info, so really why would one not want to get out all the old transmission fluid? Since the shops no longer use the high pressure flushes because they caused issues with the transmissions I would think the low pressure flush plus change the transmission filter would be the best way to go

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Old 01-15-2016, 07:32 PM   #14
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http://autoreviewer.wefacts.com/wp/2...-fluid-change/

Good quick read

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Old 01-16-2016, 04:46 PM   #15
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What transmission oil should I use to have it refilled and how much does it take

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13 qts dry
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Old 01-16-2016, 05:28 PM   #16
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13 qts dry
Thanks sir

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Old 03-01-2016, 10:13 AM   #17
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Quote:
Originally Posted by 2011 Kona Blue View Post
I just called AAMCO and they told me today's flushes are all low pressure. The modern day machines no longer use high pressure they use low pressure.

Non 🍼and non 🌽fed. I $uck!
YEs, if you take it to a respectable tranny specialist. If you take it to a speedy lube you will likely get an old school tranny destroying high pressure flush.

It's always good to ask, wherever you take it.
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Old 05-26-2016, 10:02 PM   #18
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wouldn't warming the car up then hooking up the machine allow it to be flushed
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