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post #1 of 16 (permalink) Old 03-09-2018, 10:00 AM Thread Starter
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JF1A/JF3A transfer case input shaft

Hi,
does anyone know how much splines the JF1A/JF3A transfer case input shaft has? What is the transmission output shaft diameter? Can't find these data.
Thanks.

Patrick
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post #2 of 16 (permalink) Old 03-09-2018, 10:11 AM
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Curious as to why swap out the Hilux one. Don't have your answer, but this thread might have some interesting reading for you.


https://www.tundratalk.net/forums/tun...completed.html


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post #3 of 16 (permalink) Old 03-09-2018, 10:36 AM Thread Starter
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That's the thread why I'm here :-)

Quote:
Originally Posted by Azblue View Post
Curious as to why swap out the Hilux one.
Is a crazy project... I want to replace my 102hp Diesel engine and manual transmission with an Lexus LS600h hybrid transmission, using it in full electric mode (no gas engine). Unfortunately it has a 19 splines, 34.5mm output shaft. Up to now I did not find a spud shaft or coupler to mate it to my 23 spline Hilux transfer case. So the hope is, that the Tundra/Sequoia cases have a 19 spline input.
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Crazy is an understatement
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post #5 of 16 (permalink) Old 03-10-2018, 07:05 AM Thread Starter
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Originally Posted by mjulien77 View Post
Crazy is an understatement
yeah that's true.

There are different tundra transmission used with the the JF1A transfer case, the AB60F, A750F and the A760F. Curious some vehicle VIN plates show the A760H transmission, but it's impossible too find these on toyodiy.com. The part number 35010-0C350 on the transmission does not exist there. It shows only the 35000-0C300 for the A760F one.
However the part numbers for the transfer case differ. Same for the input shafts. So I think there are different input shafts depending on engine and transmission configuration. Maybe some with 23 splines (AB60F?) and hopefully some with 19 splines (A750F, A760F/H?).
But I don't know, everything only guesswork.

Last edited by hilux.hx; 03-10-2018 at 07:21 AM.
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Is there someone who has a JF1A or JF3A transfer case laying around and can count the splines on the input shaft for me?
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post #7 of 16 (permalink) Old 03-11-2018, 06:32 PM
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Quote:
Originally Posted by hilux.hx View Post
...There are different tundra transmission used with the the JF1A transfer case, the AB60F, A750F and the A760F. Curious some vehicle VIN plates show the A760H transmission, but it's impossible too find these on toyodiy.com. The part number 35010-0C350 on the transmission does not exist there. It shows only the 35000-0C300 for the A760F one.
However the part numbers for the transfer case differ. Same for the input shafts. So I think there are different input shafts depending on engine and transmission configuration. Maybe some with 23 splines (AB60F?) and hopefully some with 19 splines (A750F, A760F/H?).
But I don't know, everything only guesswork.
So, I've been puzzling over your post for several days now, and frankly, I don't understand it. I'm beginning to think this is really a "what if" brain-storm project for your entertainment, with someone else doing the legwork.

What year is your Hilux, and what is the market value?...Does this mod make any sense economically? It probably doesn't make any sense for fuel savings, not even in Europe.

Do you already own an LS600h donor vehicle? If not, have you priced one?

I am not clear on why it has to be JF1A/JF3A transfer case and an A760 transmission...Does the LS600h donor vehicle have an A760H transmission? Forgetting about the output shaft splines, will a JF1A or JF3A transfer case even flange up to an A760H transmission? (Maybe you've already answered these questions for yourself, and it's not necessary to tell us.)

What I have been able to determine in research for you:

(1) Yes, you are correct. A search for A760H transmission on Toyota online dealer sites turns up "No records". You don't suppose this is exclusively a Lexus transmission? From my experience, Lexus part numbers, if they are exclusive to Lexus vehicles, will not show up on Toyota sites. Now, if the part is used on both vehicle brands, and that does happen, only the Toyota applications will show up on Toyota sites.


Edit: I can't reconfirm how I made the connection between the JF1A transfer case type and the part number below...the information below may be bogus. Sorry.

(2) The JF1A transfer case is used in 2010-2012 Sequoias, 2010-2017 Tundras with 4.6L 4WD (and maybe others, not an exhaustive search). It is available through Toyota online dealers with different part numbers for the applications (14-17 Tundra SR5: 36100-0C010) for about $2258, cheaper used through eBay ($500; shift actuator typically sold separately, maybe another $300).

https://parts.toyotaofcoolsprings.co...Y4LWdhcw%3D%3D

https://www.ebay.com/itm/14-15-TOYOT...hZ-Vre&vxp=mtr

(3) Your best bet for "spline counting" will likely be a retrofit dealer or a salvage dealer that has something to possibly gain from answering your questions. Most of us here only own one personal Tundra, and if we've had the pleasure of repairing the transfer case, we probably didn't count the splines in our haste to get it back together.

For example, my research shows that earlier Tundra, 4.7L 4WD transfer cases (PN 36110-34010) could very well have 19 splines from a count/estimate of a magnified eBay photo. I have no idea if this transfer case will flange up to your intended transmission, or will serve your purpose. See this eBay listing and make your own count/estimate, and maybe contact the seller:

https://www.ebay.com/itm/2004-TOYOTA...VaUpfS&vxp=mtr

Another name that pops up when you search for JF1A/JF3A transfer cases in 4X4 retrofit projects is @JowettPerformance. If you are likely to be a customer, they'll probably talk to you about what you want to do.


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Last edited by OldGuy43; 03-11-2018 at 07:07 PM.
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post #8 of 16 (permalink) Old 03-12-2018, 07:01 AM Thread Starter
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@OldGuy43 : Thanky you very much for your reply, work and invested time for researching this!

Quote:
Originally Posted by OldGuy43 View Post
I'm beginning to think this is really a "what if" brain-storm project for your entertainment, with someone else doing the legwork.
No, that's not the case. My Hilux is totally disassembled. Most parts are laying in my workshop sand blasted and powder coated, ready for assembling. I have to do it by my own.

Quote:
Originally Posted by OldGuy43 View Post
What year is your Hilux, and what is the market value?...Does this mod make any sense economically? It probably doesn't make any sense for fuel savings, not even in Europe.
It's an 2004 Hilux double cab KDN165, the last of the small size ones. You are right, it doesn't make sense for fuel savings. The diesel engine has a low fuel consumption, but the emissions are a big problem here in Germany. It's not allowed to drive in most towns with it. And there is no solution to get a better emission rating (besides putting a brand new ad-blue diesel or a gas engine in it). I'm a huge fan of hybrid and pure electric vehicles. So the goal is to get an electric small size truck with a minimum real world range of about 80km to 100km (can charge at home and work).
The following project inspired me to do this conversion:

BMW 330ci conversion - DIY Electric Car Forums

I know it's not a truck

Quote:
Originally Posted by OldGuy43 View Post
Do you already own an LS600h donor vehicle? If not, have you priced one?
Don't need a complete vehicle, just the hybrid transmission, inverter and some small parts. There are a lot of parts for cheap in the salvage yard... about 1500 Euro for the hybrid transmission, inverter and wires. Also there are parts from other Lexus models, which are usable.

Quote:
Originally Posted by OldGuy43 View Post
I am not clear on why it has to be JF1A/JF3A transfer case and an A760 transmission...Does the LS600h donor vehicle have an A760H transmission? Forgetting about the output shaft splines, will a JF1A or JF3A transfer case even flange up to an A760H transmission?
It's not a A760 transmission, it's an L110F hybrid one with two electric motors in it and a 19 spline output shaft to connect the transfer case. My VF4BM transfer case will not fit due to a different input design, even if I could get a 19 spline input shaft (I don't believe there is one). The input shaft/flange design of the JF1/3A series transfer cases looks like it could fit perfectly (if it has the right spline count). The case flange will definitely not fit, but I can make my own housing or flange adapter for it.
The case has to be out of a second generation Tundra/Sequoia. First gen Tundras use the VF2A/VF4B series t-cases (e.g. 36110-34010) and later ones some made by Borg Warner I think.

Quote:
Originally Posted by OldGuy43 View Post
Your best bet for "spline counting" will likely be a retrofit dealer or a salvage dealer that has something to possibly gain from answering your questions.
I already tried this, but with no luck up to now. Most photos does not show the input shaft directly, so it's nearly impossible to decide if this are 19, 22 or 23 splines. But I will keep trying ...

Last edited by hilux.hx; 03-12-2018 at 07:15 AM.
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post #9 of 16 (permalink) Old 03-12-2018, 08:30 AM
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Thanks for your patience in retelling your progress. It is a very interesting and challenging project.

Are you trying to retain existing 4WD in your Hilux by using the JF1A transfer case? Why don't you just skip 4WD and convert the Hilux to electric 2WD using the complete LS600h drivetrain? I know nothing about the LS600h, and only assume it was 2WD originally; if it was AWD, then ?

The linked thread below is where I might have made the JF1A transfer case connection to a specific part number. There is a lot of drag racing bs early, but see posts by Jowett Performance, beginning at post 10. He indicates 07-13 Land Cruiser, Sequoia, and Tundra transfer cases are JF1A, and from what I saw in other sources, for the 4.7L displacement engine.

https://forum.ih8mud.com/threads/lc-...a-2010.847944/

I'm sorry I can't be of help. One plan you may not have considered is to simply take the LS600h to a salvage dealer, and see if they will accept the task of matching your transmission output shaft to a transfer case you will purchase. It would require gambling on the purchase of the LS600h parts, but it sounds like you are already heavily committed.


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Last edited by OldGuy43; 03-12-2018 at 08:36 AM.
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post #10 of 16 (permalink) Old 03-12-2018, 01:10 PM Thread Starter
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Quote:
Originally Posted by OldGuy43 View Post
Are you trying to retain existing 4WD in your Hilux by using the JF1A transfer case?
Yes I would like to retain 4WD and the low range feature. Since the Tacoma/Hilux/4Runner/... cases do not fit, I have to find another solution. So the JF1A case seams an option. If so, I want to go with the Sequoia JF3A version with the Torsen center diff for full-time 4WD to get it all

One ebay dealer took a look at the input shaft... !!!WRONG!!! Tundra transfer case part# 36100-34171 has a 19 spline input shaft !!!WRONG!!! That's the one which mates to the AB60F transmission with the 3URFE and 3URFBE engines. Equivalent part# for Sequoia multi-mode case should be 36100-34191.

It is for a 22 spline shaft (count 19, 3 missing ones --> 3 bigger gaps)

But I don't know what input shaft count the cases behind the A750F and A760F transmissions with the 2UZFE / 1URFE engines have. Part numbers are 36100-34161 and 36100-34181 (Sequoia).
However I think I have - not - found the case with the right input shaft. Still waiting for some measurements from the ebay seller to be sure.

36100-0C010 (A760F) and 36100-0C020 (AB60F) are Borg Warner (as far as I know) cases with the same input shaft, like the two earlier ones. Do not know these further.

Quote:
Originally Posted by OldGuy43 View Post
I know nothing about the LS600h, and only assume it was 2WD originally; if it was AWD, then ?
LS600h is AWD, GS450h only rear wheel drive. Basically both have the same transmissions but with a different tail-housing and output shaft. The AWD Lexus t-case has a Torsen center diff, but not lockable, no low range and no 2WD option for saving some energy.


Quote:
Originally Posted by OldGuy43 View Post
One plan you may not have considered is to simply take the LS600h to a salvage dealer, and see if they will accept the task of matching your transmission output shaft to a transfer case you will purchase.
That would be great, but here in Germany it's very hard to find these parts... LS600h transmissions maybe, but a Tundra/Sequoia/LC 200 transfer case... nearly impossible.

Last edited by hilux.hx; 03-14-2018 at 04:51 AM.
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post #11 of 16 (permalink) Old 03-12-2018, 01:52 PM
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Sounds like you're making some progress in your quest. Good Luck.


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Correction: Got some photos from an input shaft of an 36100-34191 t-case (Sequoia, 3URFE/3URFBE, AB60F). There are 19 splines, but 3 missing ones! So it's for a 22 spline shaft. Not useable for my application. I corrected the data in the post above.

Measurements from an Tundra 4.6L t-case (1URFE, A760F, 36100-34161):
Inside shaft diameter just before the splines start is 1 7/16" (36.5mm). At the splines it should be about 34.5mm. Outside shaft diameter is about 2" (51mm). The measurements are good and would work. Spline count was wrong. So will try to get a photo of it.
Attached Images
File Type: jpg 36100-34171_input_shaft_1.jpg (186.6 KB, 10 views)
File Type: jpg 36100-34171_input_shaft_2.jpg (147.8 KB, 8 views)
File Type: jpg 36100-34171_input_shaft_3.jpg (188.7 KB, 9 views)

Last edited by hilux.hx; 03-18-2018 at 06:46 AM.
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post #13 of 16 (permalink) Old 03-15-2018, 01:24 PM Thread Starter
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Re-count of the 36100-34161 input shaft splines is 17. There should be two splines missing, like on my 23 spline VF4BM transfer case (look at the two attached photos). That means it's for a 19 spline shaft. Would be the right one! But I'm not 100% sure until looking at a photo of it.
Attached Images
File Type: jpg VF4BM_shaft_front.jpg (191.7 KB, 17 views)
File Type: jpg VF4BM_shaft_side.jpg (189.4 KB, 14 views)
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post #14 of 16 (permalink) Old 03-16-2018, 09:01 AM Thread Starter
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Unhappy

No progress... asked ViktorG if he can help. Hope he has the right t-case laying around to make a photo.
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post #15 of 16 (permalink) Old 03-24-2018, 01:41 PM Thread Starter
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Confirmed! The cases behind the A750F and A760H/F transmissions have a 19 spline shift. Found a picture of a Land Cruiser 200 t-case (36100-60A90 or ...1 or ...2) on a Russian website:



http://япчасти22.рф/part.php?id=G002629

Now, the next task: Buying a Sequoia 36100-34181 t-case and getting it to Germany!

Last edited by hilux.hx; 06-07-2018 at 07:21 AM.
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