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Transmission filter

Posted: Tue Apr 15, 2008 1:46 pm
by Gray
I've looked through the service manual for reference to a transmission filter but haven't found anything. Do any know for sure if there is an internal filter or does Nissan just use a screen. If there is no OE filter provided would there be some upside to installing an aftermarket transmission filter on an oil cooler line for towing or offroad trail use?

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Re: Transmission filter

Posted: Tue Apr 15, 2008 3:47 pm
by BMXPath
Greybrick wrote:I've looked through the service manual for reference to a transmission filter but haven't found anything. Do any know for sure if there is an internal filter or does Nissan just use a screen.
The R51 uses no filter or screen.

Re: Transmission filter

Posted: Wed Apr 16, 2008 12:00 pm
by SHAWNATGERBROCK
BMXPath wrote:
Greybrick wrote:I've looked through the service manual for reference to a transmission filter but haven't found anything. Do any know for sure if there is an internal filter or does Nissan just use a screen.
The R51 uses no filter or screen.
Huh ... Nissan P/N 31728 7S11A is the filter for the R51 A/T trans. ... But it is a screen type , so there is no need to replace or clean unless you have really bad fluid or internal damage ...

Posted: Wed Apr 16, 2008 4:09 pm
by Gray
Thanks Shawn, some of the local transmission shops are trying to sell me on aftermarket transmission filters. Not a lot of price but would it be effective to a Nissan automatic transmission in the long run.

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Posted: Thu Apr 17, 2008 12:19 pm
by SHAWNATGERBROCK
Greybrick wrote:Thanks Shawn, some of the local transmission shops are trying to sell me on aftermarket transmission filters. Not a lot of price but would it be effective to a Nissan automatic transmission in the long run.

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Probably wouldnt hurt , but you would have to be sure to change it with fluid changes .... I would hate to see it plug up and cause an issue !!

Posted: Mon Apr 21, 2008 5:50 am
by Gray
SHAWNATGERBROCK wrote:Probably wouldnt hurt , but you would have to be sure to change it with fluid changes .... I would hate to see it plug up and cause an issue !!
Thanks Shawn, like an engine oil filter these automatic transmission filters have a pressure bypass as well so they wouldn't plug a line. From reading some previous model PF auto transmissions have had problems with the trans cooler plugging off, but I haven't heard of problems with the 05+ yet.

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