RX - 1st Gen (1999-2003) Discussion topics related to the 1999 -2003 RX300 models

Transmission - drain and fill or strainer replacement first?

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Old 05-12-09 | 06:51 AM
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Default Transmission - drain and fill or strainer replacement first?

I am considering doing a transmission drain and fill several times on my 02 FWD (105K), and I was wondering if it makes sense to drain and fill 2-3 times and then drop the pan and replace the strainer(filter) or replace the filter first?

Any suggestions?
Old 05-12-09 | 07:01 AM
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Originally Posted by m1tk4
I am considering doing a transmission drain and fill several times on my 02 FWD (105K), and I was wondering if it makes sense to drain and fill 2-3 times and then drop the pan and replace the strainer(filter) or replace the filter first?

Any suggestions?
Drain and fill two times and then replace the filter on the 3rd drain and fill.. You will then get more particles out of the system that that are in suspension in your filter, since not all of the fluid comes out during a drain and fill.
Old 05-12-09 | 08:54 AM
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Exactly ..

Near clogged filter is the best filter to catch anything. [clogged filter may cause other serious problems but it filters the best]. So do the drain fills and on the last drain -- drop the pan and replace/clean filter as you wish.

Salim
Old 05-12-09 | 09:34 AM
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Makes sense. Thank you both!
Old 05-12-09 | 04:13 PM
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I am about to do the same with my 99 RX300, with the exception that I am installing a "remote(external) transmission filter" before I start the drain and fill so I can change this filter as I do the drain and fills to get most of the crap out of the transmission. After about, or around the third I will drop the pan and change out the metal mesh screen in the transmission. Any thoughts?
Old 05-12-09 | 09:15 PM
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Yep, been there done it. I have an external filter on mine. works fine. Mine is made by perma cool. uses a ph8 or equivalent. It alone adds about a half quart of fluid. Next moving the tranny cooler to cooler places...
Old 05-14-09 | 05:18 AM
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Originally Posted by thomas1
Yep, been there done it. I have an external filter on mine. works fine. Mine is made by perma cool. uses a ph8 or equivalent. It alone adds about a half quart of fluid. Next moving the tranny cooler to cooler places...
When did you install the external transmission filter? Between the 2nd and 3rd transmission? Is it working well, any changes in performance?
Thanks
Old 05-14-09 | 06:29 AM
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Originally Posted by thomas1
Yep, been there done it. I have an external filter on mine. works fine. Mine is made by perma cool. uses a ph8 or equivalent. It alone adds about a half quart of fluid. Next moving the tranny cooler to cooler places...
Or just put an atv fan on it,and leave it where it is.iv been thinking about that,but my trans. actually works better when its hot.(dont ask,i cant tell you why)
Old 05-14-09 | 07:54 AM
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I put the tranny filter on after the warranty period for the last tranny. By the way the second tranny was defective, sos that is why I am on the third. No changes in performance or shifting. I thought about the atv fan, but havent pulled the bumper off to see how much room there is. my thought was move the cooler to the front of the car.
Old 05-14-09 | 07:58 AM
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Originally Posted by thomas1
I put the tranny filter on after the warranty period for the last tranny. By the way the second tranny was defective, sos that is why I am on the third. No changes in performance or shifting. I thought about the atv fan, but havent pulled the bumper off to see how much room there is. my thought was move the cooler to the front of the car.
That can/will affect your a/c performance,if its not located far enough away from the condensor.(the thing in front of your radiator)
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