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Which is better, Transmission drain or flush?

Discuss anything related to the engine, electronics, transmission, etc.
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MarcKyle64
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Posts: 9
Joined: Sun May 27, 2012 12:10 pm

Which is better, Transmission drain or flush?

Post by MarcKyle64 » Thu Jun 14, 2012 1:54 pm

Wondering which is better for the 6 speed, as the flush is twice as expensive as the drain/refill. A flush is $198+tax at the dealer.


Double G
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Joined: Fri Jun 24, 2011 5:41 pm

Re: Which is better, Transmission drain or flush?

Post by Double G » Thu Jun 14, 2012 3:14 pm

Well on our cars you can drain and refill it your self rather easy. The cost for a case of fluid is around $80.00. The way I did it was drained the 3+ quarts at the oil change one, then at oil change 2 do the next 3+ quarts and then at change # 3 another 3 quarts. That way you almost have brand new fluid.

As far as having a dealer do it, search around for a mechanic who probably can do it cheaper. Just had an Alero's system flushed for 119.00. Good Luck

TJ Reams
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Joined: Tue Jun 19, 2012 4:45 pm
Location: Abilene TX.

Re: Which is better, Transmission drain or flush?

Post by TJ Reams » Wed Jun 20, 2012 12:04 am

The Flush is the only way to get new fluid into the transmission. When you drain the pan all you get is what is in the pan. There is still fluid in the torque converter, trans cooler and lines. Three quarts at a time is like removing the oil filter on the engine then just adding 1 qt of oil.
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twiggy144
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Location: Montreal

Re: Which is better, Transmission drain or flush?

Post by twiggy144 » Wed Jun 20, 2012 6:34 pm

On my previous Nissan Maxima, I disconnected the return coolant line coming back from the radiator, and attached one end of a section of clear vinyl tubing to the rad, and the other end directed in an empty can. Started the engine, flushed half a gallon at a time. Stopped the engine. Topped off the transmission with same amount of fresh fluid. Repeated these steps 5-6 times until clear and fresh fluid flushed out and was dumped in the can. Took about 10-12 quarts before clean fluid started to be flushed out.

This process works well enough for me, in spite of being a little time consuming. Oh yeah , a piece of clear vinyl tubing is handy for the dumping.
Taurus 2010 SEL and Fusion SEL AWD 2007.

rksmith88
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Joined: Fri Oct 20, 2006 6:56 pm
Location: Skowhegan, Maine

Re: Which is better, Transmission drain or flush?

Post by rksmith88 » Tue Sep 24, 2013 6:48 pm

Flush, get rid of it all!
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thesavo
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Posts: 32
Joined: Wed Sep 03, 2008 1:46 pm

Re: Which is better, Transmission drain or flush?

Post by thesavo » Tue Sep 24, 2013 10:19 pm

Pulling the fluid line and letting the pump do the work is recommended by many on TCCA and TSOC.

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