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Old 05-13-2016, 01:55 PM   #1
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Transmission Check Valve?

Can our transmissions be flushed with a machine, the reason I ask is I heard about a check valve being in our trans preventing this yet some Ford dealers say they can flush them, some say they just do a pan drop. The reason I ask is I have seen a few deals on flush machines and would like to purchase one
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Old 05-25-2016, 11:04 AM   #2
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Wow I stumped the band?
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Old 05-25-2016, 01:59 PM   #3
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If you haven't already, you may want to check out this thread...

Mustang 11+ 6R80 transmission fluid change (Auto)
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Old 05-25-2016, 05:53 PM   #4
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My local Ford dealer dropped my pan, changed the filter then put the pan back on and did a flush until clean fluid started running out of the torque converter. All for $200
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Old 05-26-2016, 02:00 PM   #5
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Id take it to a tranny specialist. They use the cars natural pressure to cycle out the old fluid and cycle in the new stuff. If your car has less than 60k you should be fine with a power flush, but I steer clear of them at any mileage.
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Old 05-26-2016, 09:54 PM   #6
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Quote:
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My local Ford dealer dropped my pan, changed the filter then put the pan back on and did a flush until clean fluid started running out of the torque converter. All for $200
Thanks but I have 3 cars and always flush the fluid every 60 k so if I can get a deal on a used system it makes more sense plus I want to switch to royal purple Usually I just disconnect the return and flush it that way, now that I have 3 cars the unit really would help. I pretty much have a full shop in my garage so figure what the heck oh and if Anyone thinks changing at 60k is overkill I have a 1997 grand prix with 325k and a chevy with 252k both have original trans
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Old 05-27-2016, 07:47 AM   #7
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Quote:
Originally Posted by Logan541 View Post
Thanks but I have 3 cars and always flush the fluid every 60 k so if I can get a deal on a used system it makes more sense plus I want to switch to royal purple Usually I just disconnect the return and flush it that way, now that I have 3 cars the unit really would help. I pretty much have a full shop in my garage so figure what the heck oh and if Anyone thinks changing at 60k is overkill I have a 1997 grand prix with 325k and a chevy with 252k both have original trans
With all due respect, there's no way of proving it was the 60k fluid changes that made that happen.
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Old 05-27-2016, 09:27 AM   #8
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With all due respect, there's no way of proving it was the 60k fluid changes that made that happen.
Granted but I am inclined to believe it was a contributing factor
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Old 05-27-2016, 10:27 AM   #9
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I would say that many transmissions making it that long is a pretty solid indicator that keeping your fluid and filter clean makes a huge impact. I personally believe car companies tell people they have "lifetime" atf because they know you will buy a new car when your tranny craps out.

There is no such thing as lifetime atf. It's properties break down over time like any other fluid.
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Old 05-27-2016, 11:52 AM   #10
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My Dad, who in my eyes was the greatest Mechanic I ever knew (May God rest his soul he passed away 18 months ago) Always told me Fluid no matter what it is breaks down so anything with fluid should be changed on a regular basis his cars lasted forever. He would drain power steering and brake fluid every 30,000 and change it, oil and filter every 3,000, ever differential fluid at every 50k. He would grease every fitting every other oil change. Like I said his cars lasted forever. Would drive them for years then sell them for top dollar when he decided to get a new one
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Old 05-27-2016, 12:28 PM   #11
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Originally Posted by Logan541 View Post
Granted but I am inclined to believe it was a contributing factor
I don't doubt it!
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