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In line transmission filter

5353 Views 9 Replies 5 Participants Last post by  p..
Wanted a replaceable transmission filter on this vehicle. Not super impressed that Honda buries a tiny one in the middle of the transmission and that's it. Added this into the cooler return line. Have a few thousand miles on it now, seems to at least not be causing any problems.

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Smart move man I don't understand there logic on no replaceable transmission filter . Especially after all the problems they has with the 2000 year accords and odyssey vans .
That's exactly what I was thinking. Plus, every time I've pulled the pan on an auto trans that hasn't had regular service, there's a layer of friction plate/band material sitting there under the filter. Don't even want to think about where that ends up in the Honda trans.

FWIW, I used this to mount the filter. Had to fab up my own hard lines though to get things pointed in the right directions to accept the return. Probably other ways to do this, but I wanted to put the biggest spin on filter I could in the space available.

Perma-Cool Remote Oil Filter Brackets 1731

Since mounting this thing, I've driven the truck across the country. Seems to be doing okay. Seems to shift a little better. Maybe pulled some junk out that was making the solenoids stick a bit. Who knows.
Personally, I opt for frequent tranny fluid changes (every other OCI).

But I can't say that my approach does the same thing as adding an external, changeable filter.
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Personally, I opt for frequent tranny fluid changes (every other OCI).

But I can't say that my approach does the same thing as adding an external, changeable filter.
I wonder if locating a filter fixture in an easily serviceable location - like somewhere up high in the engine compartment - around the P.S. tank is possible.

If adding resistance in the external fluid circuit & filter isn't an issue, I could see all kinds of service benefits putting a "walk up" filter" under the hood. With the right plumbing, a guy could devise a very easy-to-use fluid exchange procedure where the trans could pump it's own fluid out while drawing new fluid in. A couple of AN quick connects would make it super easy to perform a 100% exchange without spilling a drop or heading down under.

The whole thing could be hard plumbed too, no more hoses. A tube bender, flare tool and some duct tape. Bingo bango! :smile:

In the 40+ year old GMC motorhome, a cooling system filter had been installed with this Frankenstein assembly of garbage - before I bought her.

Auto part Pipe Metal

Didn't take long to get around to replacing it with this.
Water Auto part Trunk Gas Fluid

Auto part Vehicle Engine Car Wire

A similar trans filter design seed has now been planted for the coach and RL. Damn it!
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Reason I went with that big Wix is to reduce as much as possible the restriction. Looked at the Magnefine products but they didn't flow as well as a big spin-on.

Had considered a coolant filter as well, but the trans seemed more pressing.

I did similar somewhere around 2010 and haven't experienced a single problem. Of course I may never know if it helped since the transmission seems pretty robust if you avoid the strawberry milkshake. Mine started as a search for a tranny temp gauge since early on folks seemed to be overheating their transmissions by locking it in second gear which locks out 1st gear. Seems leave it in D and forget unless you throughly read the manual
That's funny. We went for the same mounting bolt. I didn't even see that thread. It would have saved me a bunch of time laying under the truck trying to figure out where I was going to mount the filter. :)

I'm roughly planning on changing the filter once a year. How have you handled it? Ever cut a filter open to peek inside after?
Yes, looking at the dates it looks like I replaced the filter about a year later and I did cut it open. Shade tree mechanic test was to wipe the filter material with a white paper towel and I'll that was left on the towel was the red color from the fluid. I considered that good news and decided to just replace every year or so. Little to nothing leaks out when replacing the filter so it's an easy job. I used a purolater pure one the second time and actually it's been in place several years now. Suppose I should go ahead and change it but as you said the size of the filter membrane should last a long time, I just don't have a good measure of how long is a long time! I'm guessing every 2 years is plenty.. What do you think?

If you click on the top right of the thread where I posted my install you can see others input to the project as well as pics of my first filter cut open. Have a good one!
I figured the same approach, change it after a year on the first one and cut it open to see what it's been collecting, then from there, either once a year or every other year.

I've only had the truck a year, but put some pretty hard miles on vehicles and usually do all the gearbox fluids and brake fluid every year. Figure I'll do the trans filter on the yearly fluid change. Compared to what Honda sends the truck out with, anything's better.
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