Transmission Hose Male Fitting Size

[hygge]

Hello Friends,

When I originally put in my BM Transmission Cooler, I didn't have the right fittings ( like an idiot).

Anyway, I've noticed it leaking since the threads from the fitting I got from Napa were incorrect ( they do not carry anything metric at my local store).

I wanted to correct things, so I bought an AN kit and some new fittings to upgrade things.

I knew that the radiator outlet is a 14mm x 1.5, so I bought a 14mm x 1.5 to -6 AN. However, upon doing my install, I found that the 14mm x 1.5 is too small to actually fit into the return hose line that goes back to the transmission. This was an oversight of mine since the two ends of the elbow are obviously different sizes now that I am looking more closely at it.

Does anyone know what the other end of the 45 degree elbow is in terms of size? I figure once I get a -6AN to a ?? mm x ??? I will be all set for the moment. For reference, the blue aluminum fitting is -6AN on the right, but the wrong size on the left.

Thanks

 

[Randy88FJ62]

I have this one on the cooler portion of my radiator right now:
Amazon product ASIN B01BH71DDC
JIC to an M14 x 1.5mm

JIC fitting - Wikipedia

 

[Randy88FJ62]

So the soft line hoses are special metric flares that my local hose shop here in CA said are unobtanium. They took my old ends and swaged new hoses onto them. That is your current issue which I don't have an off the shelf solution.

My story, read last post for summary.
Blew a trans cooler hose in Death Valley. Need to upgrade hardware.

 

[hygge]

Well, since I had the length of braided hose long enough to go from the transmission cooler to the transmission itself, I decided late last night to start disassembling the return line.

I had read that the inlet to the transmission is a 14.5mm x 1.5 which is the fitting that I have. So I've decided to make an 8ish foot long return line from my braided hose. I will use a 90 degree -6 AN fitting to connect it to my -6AN to 14.5mm x 1.5 fitting . And not that I am in love with this, but a simple clamp on the transmission cooler to keep it in place. Unfortunately the cooler I bought does not have any way to use AN or NPT fittings.

Originally I was hoping it would have been just a fitting that would solve this, but probably better to upgrade the entire line anyway.

When I get back from my upcoming trip down to Johnson Valley, I will finish the job and replace the outlet line in similar fashion.

Updates to follow.

Thanks for the suggestions @Randy88FJ62 !!

 

[Randy88FJ62]

I agree with you. The F250 cooler I use has hose clamps for the in and out ports. They are long and have a riser / nipple like protrusion on the OD so it's designed for hoses to slip over and clamp on.

I run two hose clamps per for redundancy.

 

[shipmag]

It seems this may be common enough to have some hoses made? I have a supplier of fittings from Europe. If you give me the fitting sizes and hose length I can see about getting these made. Are these for pressure side or return or both? The hoses I typically have made up are stainless steel braided hoses. I also have made shift plates showing an automatic in place of a manual.
Shipmag

 

[shipmag]

Yep talked to supplier we just need to know the length, fitting size and if its the pressure side or return. On low pressure side we can do banjo bolts if its not a pipe thread.

 

[hygge]

@shipmag nice that you have a connection and supplier.

If you are thinking about making transmission line kits, there is probably a market for it.

There are really two routes that you could go.

1. Transmission lines to replace old OEM ones (which are NLA). And would directly hook into the radiator.

2. Transmission lines for folks with auxiliary transmission cooler used in conjunction with the radiator.

For option 1, it will require approximately 2 x 8’ lines. Fitting are 14mm X 1.5 (4 total). There are also four 90 degree -6AN fittings. You could use 14mm x1.5 to -6AN fittings so that they will directly bolt into both the radiator and the transmission.

Option 2 is slightly more complicated since you won’t know what auxiliary cooler is being used. I also added a transmission oil filter inline on my return.

Good luck!

 

[shipmag]

For the low pressure side i know they have a banjo bolt style. What is the inside diameter of the pressure side and return side?

 

[shipmag]

1. Transmission lines to replace old OEM ones (which are NLA). And would directly hook into the radiator.

2. Transmission lines for folks with auxiliary transmission cooler used in conjunction with the radiator.

For option 1, it will require approximately 2 x 8’ lines. Fitting are 14mm X 1.5 (4 total). There are also four 90 degree -6AN fittings. You could use 14mm x1.5 to -6AN fittings so that they will directly bolt into both the radiator and the transmission.

Option 2 is slightly more complicated since you won’t know what auxiliary cooler is being used. I also added a transmission oil filter inline on my return.

 

[shipmag]

Is there enough clearance for this style of fitting on the return side? Are all the fittings on oem hoses going into radiator and transmission and pump m14x1.5? Arent there three hoses? Pump to transmission, transmission to radiator and radiator to low side of pump? On the oem hoses need lengths and fittings sizes to the oem location.

 

[Morgan Evans]

Just did this today, 16x1.5 inverted flare to 6AN is what you need to connect to the soft hoses.
https://www.summitracing.com/parts/brg-925121
Borgeson Power Steering Hose Adapters 925121

 

[shipmag]

is there room for a banjo fitting like the one in the post above? That eliminates the extra fitting and makes a cleaner fit. But depends on the real estate. just let me know I can use a banjo on the pressure side also. I am trying to find out if they make the banjo fitting in a 20, 30 and 45 degree options. I can get Mocal, Setrap and Mocal HD coolers as well as oil filter housings. But hoses are too expensive one at a time we need to do it as a group buy. So every one needs to agree what we want. First group buy is usually 20. The hose would be 6AN Teflon stainless Steel Braided. The bybass hose is a M18X1.5. Let me know how I can help. All the money goes to my mission project converting Banana Pseudo Stem after fruit is harvested into fabric they make clothing out of through out the tropics. If any of you know any thing about growing enzymes contact me I need help.
Shipmag

 

[WILLD420]

6 AN Line is only 5/16 ish" i.d. It will work but anytime you can step up to an 8 you are better off because of the flow capabilities. The factory line is around a 10mm hard line size which is barely adequate for hard use. A group buy of fittings might be better as long as it goes to a common line size. Having swaged fittings is nice but being able to fix it in the states is also nice.

 

[shipmag]

6 AN Line is only 5/16 ish" i.d. It will work but anytime you can step up to an 8 you are better off because of the flow capabilities. The factory line is around a 10mm hard line size which is barely adequate for hard use. A group buy of fittings might be better as long as it goes to a common line size. Having swaged fittings is nice but being able to fix it in the states is also nice.

I will check with the vendor and see what they can do. Will banjo fittings work? Or is every one wanting a straight connector M14x1.5 to 37 degree flare using an 8 ft hose with female 37 degree straight fittings. Or? You got to tell me what is needed as I dont have one of your rigs and Im in the mid west small farm town. So its not like I can go sown the street and find an fj60. Sorry I want to help but need specifics.

 

[shipmag]

if you mudders want me to do something I will if not Ill let it die here unless I hear from you otherwise.

 

[vankho]

Reviving an old thread because I recently ran into the same challenge but hoping wiser minds can share their insights.
I installed a transmission cooler that had 6AN connectors instead of barbs so I found myself doing a partial conversion to 6AN fittings.

I wanted to avoid cutting the crimp on the soft line so I went with an adapter (per @Morgan Evan's post earlier #12). [M16x1.5mm to 6AN male] Tried to visualize my setup below. It almost feels too straightforward?

1. What risks am I taking?
2. Is the lack of an inverted flair on the M16x1.5 adapter an issue? (@Randy88FJ62 I saw your note about unobtanium special metric flares?)
3. Am I missing or overlooking anything else?

 

[tmxmotorsports]

Pretty sure you need inverted flare fitting at the line shown above. I've used psc fittings for power steering stuff for this they are steel not aluminum . If psc doesn't offer them it may have been borgeson not sure if I spelled that correctly . Hope that helps
Tommy