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Thread: Flush 411
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12-23-2010, 03:51 AM #1
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Flush 411
I see a few threads recommending a flush. I recommend a flush. BUT....
A heads up here guys...............
The machine they use to flush your trannie......be damn sure they have flushed out the machine before they hook it up to your car. Often (see lazy ass) these mechanics at the JiffyPube/Dealerships will not clean the machine between flushes. What this does is fairly simple......
The guy before you was in a 1989 Ford Mustang with a kabillion miles on it and never had changed the ATF. He had tons of debris/shavings/crap in his burnt up ATF. It now is all over the inside of that flush machine. They hook you up and now you got his crap in your trannie along with your new ATF.
Like if a hospital used the same needle for IV's on all their patients. If the guy before you was sicker than you are guess what!
Make damn sure they have back flushed the flush machine before they hook you up.
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12-23-2010, 04:22 AM #2
The wife's Stratus "self flushes" during a fluid change. The procedure goes something like this -- disconnect a trans cooler line at the radiator. Start the engine and run it for exactly one minute. Shut it down, pour in 5 quarts of transmission fluid. Start the engine again and run it for a set period. Shut it down, pour in 6 quarts and you are done. The numbers may be off a bit, but that is essentially how it works.
I would really like to purchase a machine to perform transmission flushing in my garage -- anything out there for the hobbyist?
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12-23-2010, 04:31 AM #3
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I bought mine from a shop going broke. Craigs List.
New was $2500...I paid $500 and it had never been used
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12-23-2010, 07:23 AM #4
I see a lot of shop tools and equipment for sale at Carlisle, but I do not believe I have ever come across one of these.
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12-23-2010, 07:08 PM #5
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12-23-2010, 07:25 PM #6
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1999 Formula WS6 M6-sold- 2001 Silverado Z71
We have 2 different trans flush machines at my shop and dirty and clean fluid are in 2 separate sections of the machine. And the machines only hold enough dirty fluid for one car so it has to be emptied before (or after) every use.
Poor man's at home flush is like what PaJeff described. Disconnect a trans cooler line, attach a long length of rubber hose to it, and stick the other end of that hose into a bucket.
Start the car and let the trans pump the fluid into the bucket.
Shut off the car and refill the trans.
Repeat until fluid comes out looking clean
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12-24-2010, 02:51 AM #7
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12-24-2010, 03:16 AM #8
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1999 Formula WS6 M6-sold- 2001 Silverado Z71
Excellent question sir! Since the cooler circuit is also the lube circuit(on a lot of the transmissions I'm familiar with anyways), when you aren't returning the cooler fluid back to the transmission, you aren't lubricating the bearings and bushings in the transmission. So the answer is, you shouldn't do a flush that way.
Me personally, I think you can get away with it without much issue. If I were doing it, I'd run it until it was empty and sputtering out the hose. then shut it off.
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12-24-2010, 10:18 AM #9
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12-24-2010, 11:28 AM #10
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12-24-2010, 05:11 PM #11
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12-24-2010, 08:11 PM #12
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12-24-2010, 09:51 PM #13
Our Flush Machine will never allow old fluid back into the trans at Nissan. But that's because we do flush's right while the machine is an only in and then out and it can monitor the trans fluid cycling through the trans. I agree some shops are really crappy about doing the right things. If we got caught doing something like that at the shop I work at. I would be fired pretty fast.
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12-25-2010, 04:31 AM #14
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1999 Formula WS6 M6-sold- 2001 Silverado Z71
Yes it does. Its generally the top line you wanna use. Its the one that comes from the trans. The other is the return. Choose the wrong one and you'll have a huge mess as the pressurized ATF sprays out of the cooler and not the hose you put in the bucket...I've been there.
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12-25-2010, 05:47 AM #15
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12-26-2010, 05:08 PM #16
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Black/Black/Black- 2000 Camaro SS Vert #5301
Are you changing the filter too? Why flush and keep the old filter?
2000 SS vert, #5301, triple black, A4, leather, 3.23,SLP lid & D/D, STB, chrome 5 spokes
USN '64-'88
#3 1951-2001
www.fquick.com/planemech2
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12-26-2010, 05:54 PM #17
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12-26-2010, 07:03 PM #18
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12-27-2010, 02:25 PM #19
Anyone suggests a specific brand of ATF fluid?
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