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post #1 of 4 (permalink) Old 09-03-2003, 07:08 PM Thread Starter
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Transmission flush DIY

Hi all,

Im planning to do a transmission fluid change tomorrow as I now have 40k miles on my car and do the change every 20k miles to be sure.

Id also like to do a fluid flush to get all the old fluid out (or at least most of it), but none of our shops is able to do a flush.
They dont even know that this method exists...!!!

Anyway,I plan to do the flush myself,but I dont want to mess up my tranny.
I read somewhere that I have to remove the upper tranny cooler line and start the engine to let the fluid drain and constantly refill the fluid to keep it up to level.

Is this right and is there anything else I have to know about the home-made-flush??
I will of course use ATF+4....
Thanks so much in advance for any replies.


Last edited by EagleVision993; 09-03-2003 at 07:10 PM.
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post #2 of 4 (permalink) Old 09-03-2003, 07:16 PM
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Theres some good methods on here on flushing it by using the fluid pump already in the trans.

Basicly you just disconnect the top line, start up the car, and add fluid about as fast as its coming out. Do this until the fluid looks new coming out.
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post #3 of 4 (permalink) Old 09-05-2003, 01:21 AM
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If you do the transmission service at your planned intervals a complete flush won't be neccessary.
Just drop the pan and what comes out is good enough. Most of the junk will be in the pan, around the magnet and in the filter.

I do feel complete flushing is required for brake fluid and antifreeze.
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post #4 of 4 (permalink) Old 09-06-2003, 06:21 PM Thread Starter
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Hi, and thanks for your replies!

I do the planned intervals, but as I already bought more ATF+4 I decided to do the flush.

Worked fine but I had to hurry up getting enough fluid in the tranny as the outflow was pretty fast.

Anyway,now the flush is done and almost all the fluid should be replaced by new ATF.It wasnt very hard to do and I can only recommend it to anyone who plans to replace the least to those who have a lot of miles on their tranny.

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