Auxiliary Tranmission Filters

[ToyotaTechnical]

Just installed an inline transmission filter on my 99 UZJ100. Thought I would share as It was extremely easy (45 min job), and less than $100. I have used these on multiple other vehicles with great success including power steering systems. (FYI, I have no connection to Magnefine. Just something I picked up from amazon).

I completed a passive flush on the transmission by disconnecting the "out line" of the transmission cooler (bottom line). After the flush, I disconnected the hard line trans bracket (10mm) and used a FJ80 Fuel filter bracket to mount the Magnafine filter housing. All that was needed:

• Filter of your choice (I used a Magnefine filter 3/8)
• Mounting bracket of some sort (FJ80 3FE fuel filter bracket it perfect fit)
• Soft 3/8 transmission line
• 3 hose clamps used to secure soft transmission line

Steps:

1. Remove front valance (3 screws and 2 clips, and maybe a. plastic pin if you still have yours)
2. Disconnect the "out" soft transmission line from the Trans cooler
3. Remove 10MM bolt that secures the frame mounted hard trans line
4. Mount bracket of your choosing
5. Reinstall 10MM bolt
6. Mount Filter (be sure to take into consideration flow direction... filter has a flow arrow)
7. Re-connect OEM soft line to filter
8. Mock up new soft line
9. Secure trans lines with clamps
10. Reinstall Front Valance
11. Top off transmission fluid (if needed)

As far as benefit goes, this filter is rated around the 30-35 micron range. There is filter media, and a magnet inside. The screen or "filter" mounted in the bottom of the trans pan is around the 80 micron size. So additional filtration is provided, and this is easily serviceable (unlike screen in transmission pan). If there were ever to be a failure or leak, it can be put back to factory spec as it keeps the OEM soft line in place.

Here is how it turned out. pics below.

Red arrows indicate flow direction

Flow direction going into trans cooler:

Mounting bracket was a repurposed FJ80 fuel filter bracket. No drilling or cutting required:

 

[dubdub20003]

I'll let others weigh in who have more experience than I... but great write up!

 

[sunfic]

Do you have part # of FJ80 3FE fuel filter bracket ?

 

[ToyotaTechnical]

Do you have part # of FJ80 3FE fuel filter bracket ?

It does not look like the bracket is available as a separate part, which is a bummer. For reference, the fuel filter assembly that the bracket came from is 23300-69035.

I would look online for a generic fuel filter bracket, or fuel pump bracket. Lots of options to chose from depending on what transmission filter you go with.

 

[YezusLX]

I am curious to see something like a Blackstone report with a before and after with this mod. It seems to be a great mod to promote the longevity of these transmissions. Clean fluid never hurt anything.

 

[ToyotaTechnical]

Update on aux trans filter- set up is working great. No issues or noticeable changes in performance.

Vehicle was pushed pretty hard on most recent trip. 2.2K miles round trip, with many miles with transmission down shifting in Colorado mountain roads. About 500 miles of that was off-road mountain passes.

A couple other comments - if you are looking to protect and provide longevity to your transmission, regular preventative maintenance cannot be beat. Passive fluid flushes, using full synthetic fluid is critical. This aux filter should only augment regular scheduled maintenance, not replace it.

 

[nissanh]

I installed mine. The LC 100 fuel filter bracket works too. Mounted to the same bolt OP suggested. Had to cut the filter bracket and file off two ends to slide into the trans line bracket. All is good! Did this during my lunch break.. yes, I miss my lunch but I am happy!

 

[nissanh]

OP, the last picture you have in your first post shows the filter mounted incorrectly.

 

[ToyotaTechnical]

OP, the last picture you have in your first post shows the filter mounted incorrectly.

Yes, correct. First photo with red arrows overlayed shows correct orientation.

 

[Jczajka]

Just replaced my trashed transmission with a lower mileage used one and added this filter to my setup. A little extra insurance on the used tranny. Thanks for the how to!

I used the 100 series fuel filter (23300-50090) since it came with a mount and now I have an extra fuel filter. I cut the "wings" off with the isolation grommets on them, and hit the filed end with some paint.

 

[ToyotaTechnical]

Update on the aux filter set up on the 100 series. I have about 30K miles on it and still is flawless. Fluid still looks great but will be passive flushed in about 10K miles - at that time I will cut open the filter and inspect.

I have been working on other transmission filter set ups as well. Photos attached is the set up for my turbo 80. (Same transmission and cooler set up as the 99 UZJ100).

Baldwin B2-HPG is a great option. This photo is with the front bumper remove. When the bumper is mounted- it's hidden and protected.

 

[2001LC]

Update on the aux filter set up on the 100 series. I have about 30K miles on it and still is flawless. Fluid still looks great but will be passive flushed in about 10K miles - at that time I will cut open the filter and inspect.

I have been working on other transmission filter set ups as well. Photos attached is the set up for my turbo 80. (Same transmission and cooler set up as the 99 UZJ100).

Baldwin B2-HPG is a great option. This photo is with the front bumper remove. When the bumper is mounted- it's hidden and protected.

View attachment 4063161
View attachment 4063162

Interesting! Any flow, pressure and fluid BlackStone oil analysis data?

 

[ToyotaTechnical]

Interesting! Any flow, pressure and fluid BlackStone oil analysis data?

I only have 5K on this particular B2-HPG filter. When I hit 35K, I will take a sample and send It out.

One thing to add - I have a magnet in place on the bottom of the aux filter as well.

This set up and filter choice is based on the Allison transmissions that comes from the factory with a spin on filter.

B2 HPG:

BX=2: 6 microns
BX=75: 20 microns
Established Micron Rating: 6
Average Efficiency: 89.35 %
Burst PSI: 200

Flow
3PSI: 2GPM
5PSI: 3GPM
15PSI: 6GPM
25PSI: 9GPM

 

[nissanh]

If the magnet is inside the filter, it works, if it is outside, it will not. I have placed several super magnets (came out of old hard drives) underside of the transmission pan, and they don't catch any metal particles as observed after dropping the pan. Only when the magnet is inside the fluid, it works.

 

[ToyotaTechnical]

If the magnet is inside the filter, it works, if it is outside, it will not. I have placed several super magnets (came out of old hard drives) underside of the transmission pan, and they don't catch any metal particles as observed after dropping the pan. Only when the magnet is inside the fluid, it works.

(I am assuming) The "Super magnets" from old hard drives are neodymium. If so, The magnets you are using are not correct for the application. Neodymium performs poorly when heat is present. Most Neo. magnets loose strength as low as 175 degrees F (even though their curie temperature is closer to 300F degrees).

Ferrite and samarium magnets are better options due to a higher operational temp.

With all that said, I believe you have a magnet selection issue. A proper ferrite or samarium magnet will function properly on the outside of the filter housing.