Needed: Trans Measurements

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

AppleTech

AppleTech

Joined
Nov 11, 2007
Threads
150
Messages
913
Location
Nashville, TN
Howdy all,

I'm thinking about embarking on working out an adaptor to allow us 1FZ owners to run an affordable 5 speed transmission. I know the ECU is going to throw codes, but I'm going to work on a way to get around this, as I have some experience creating a system that tell the ECU what it wants to hear in certain conditions.

My question is this... does anyone have or have access to an A343F (and whatever the other 1FZ tranny is) to give me measurements while it is out of the truck? I have an A343F in my rig but I won't be pulling it out anytime soon.

Here's what I'm looking for:
- Length of input shaft (from the face of the transmission case)
- Length of the 1FZ bellhousing (assuming it separates from the main case, yes?)

I think the rest of the measurements I can get while it's in my truck.

Once I have some measurements, I'll be able to figure out what will fit best, but I'm leaning towards the NV4500.

-Phil
 
What about the H55F? I know they can still be had, and they are still Toyota OEM. They are pretty $pendy, though. I probably read more about those than anyone who doesn't own an FJ62 should have when I was pretty set on buying a 62 and doing a 5 speed swap.:hillbilly:
 
Well my project will consist of two parts:

1. Figuring out how to make the 1FZ ECU not cry about the TCU being disconnected. This will apply to anyone who does any transmission swap into a 1FZ.

2. Creating a means to install a more affordable 5-speed OD trans than getting one from Australia or the Middle East. Also, the NV4500 will have a myriad of possible TCs via AdvanceAdaptors and others, so it will allow us to do more drivetrain mods on the 80s than we currently can do.

-Phil
 
I am in the process of putting the A343F from a 97 LC in my 99 4runner and the 1FZ bellhousing is in my parts washer, so I can get the bellhousing dimension tonight. I had to swap a few parts from the A340E over to the A343F but I think I can still get you a pretty close measurement on the input shaft but it may be a few days since the tranny is the 4runner so I can do floorboard adjustments.
 
mmml4 said:
I am in the process of putting the A343F from a 97 LC in my 99 4runner and the 1FZ bellhousing is in my parts washer, so I can get the bellhousing dimension tonight. I had to swap a few parts from the A340E over to the A343F but I think I can still get you a pretty close measurement on the input shaft but it may be a few days since the tranny is the 4runner so I can do floorboard adjustments.
Click to expand...

Awesome... thanks much! if you don't have any plans for the 1FZ bellhousing could I pick it up off you? That would allow me to move forward on this project without dropping my trans for bellhousing mating face measurements...

-Phil
 
mmml4 said:
The bellhousing measures 176mm.
Click to expand...

Thanks!! If the trans is still out can you get me the input shaft length from tip to face of the trans casing?
 
I will have it back out of the 4runner in the next few days. I am going to replace my rear main seal and the input shaft seal in the tranny before I put it back in, so it will be out for a while. Would being able to take pictures be a benifit for you when you pick up the bellhousing, if so I can leave it out till then.
 
mmml4 said:
I will have it back out of the 4runner in the next few days. I am going to replace my rear main seal and the input shaft seal in the tranny before I put it back in, so it will be out for a while. Would being able to take pictures be a benifit for you when you pick up the bellhousing, if so I can leave it out till then.
Click to expand...

Much appreciated... I probably won't be able to get down to you for two weeks or so, as I'll be out of town this weekend and next. I don't want to hold you up.

Basically, I'm trying to just do the basic math to figure out what transmission is going to be the best fit, and then I'll probably actually pull my trans for final measurements before drafting the plans to take to the machine shop. Having a couple bells will be good so I can modify them and see which method works best.

If you have a camera handy and think to grab a couple pictures it would be grand... otherwise, no worries - input shaft length measurement should be fine for now. I appreciate your help!

-Phil
 
Here are the measurments, they are all from the face/engine mounting surface of the bellhousing. The measurements were taken with the 5VZ V6 bellhousing mated to the tranny and the difference between the 5VZ and the 1FZ bellhousing is the 1FZ is 36mm longer. I don't know if they will be the same with the original pump and input shaft.

Face of bellhousing to end of pilot shaft 30mm
Face of bellhousing to end of small splined shaft 45mm
Face of bellhousing to end of large splined shaft 66mm
Face of bellhousing to end of face of seal 98mm
[URL="http://i480.photobucket.com/albums/rr167/mmml4/99%204runner%20build/DSC02937.jpg"][/URL]

[URL="http://i480.photobucket.com/albums/rr167/mmml4/99%204runner%20build/DSC02936.jpg"][/URL]





These measurements will be the same as if the 1FZ bellhousing were still mated to the tranny.
Face of bellhousing to end of face of torque converter pilot 4mm
Face of bellhousing to end of flange of torque converter pilot 10mm
[URL="http://i480.photobucket.com/albums/rr167/mmml4/99%204runner%20build/DSC02938.jpg"][/URL]

Hope all that makes sense.
 
Perfect thank you so much... I will start mocking these up on paper and see what I can come up with (to at least see if this idea is even feasible).

One positive I can see from the pics is that the original bell bolts should not interfere with the NV4500 trans to bell bolts because of the circular pattern on the Toyota bell vs. the square pattern on the NV4500. Looks like we'll have enough meat to bolt the two together via an adaptor block.

-Phil
 
Thanks to John (mmml4), I've got a 1FZ bell from an A343F, so I'm on my way towards designing this adaptor. I THINK I've got the solution to the ECU throwing transmission errors in my head, but just got to build a harness and test it out once I've got the engineering aspect of the adaptor worked out and ready to go!
 
OK so it looks like if I use a Dodge NV4500, it will leave approximately 9/16" of space for an adaptor... not much metal but I think if I had it tapped for a nice wide fine-thread bolt it would have enough engagement... thoughts? Obviously since this adaptor would utilize the 1FZ bellhousing, I'd need to adapt the Dodge NV4500 to a Chevy-style internal slave.

Thanks!
-Phil

Here's a screen of my mockup measurements (note the A343 is not to scale as I have no measurements):
mockupmeasurements.png
 
Last edited:
Here's the first rough of the adapter:

BellhousingSide.png


NV4500Side.png


The idea with this adapter is retaining the stock 1FZ auto bellhousing and converting the Dodge trans to a GM-style internal-slave. I know the internal slave is not optimal, but it seems that you can get a good Wilwood replacement unit that works better than the GM OEM units.

I'm going this route first because centering this type of adaptor is MUCH easier than centering a bell to engine adaptor. This one is centered on the bell side by the bellhousing itself (what the front lip is for) and the transmission side is centered by the NV4500 input shaft bearing retainer.

I realize the bolt holes near the bottom are close. The NV4500 measurements are based on roughs... I don't have one on hand yet. Also, the diameter of the larger hole is likely larger than it should be... I'm still awaiting my Mitutoyo calipers in the mail for accurate measurements. If there truly is interference, I'm not worried as the NV4500 has lots of spare metal in the mounting tabs that could easily be drilled out.

Thoughts? Roadblocks at this point are not having an NV4500 on hand (or complete measurements), and the fact that I'm not entirely sure if running an internal slave is possible on the Dodge transmission... this one will take a bit more investigating.
 
Last edited:
sidebar

Phil,
Love the NV4500 adapter you're working on...sorry I don't have any measurements to help your immediate block.

Sidebar question as I have been looking for ways to swap a manual tranny into my '91 - why isn't the 6spd manual RA61F used in FJ Cruisers a transplant possibility? There must be some physical reason, but if 5 are good then 6 would be better...

Thanks,
Tim
 
You must log in or register to reply here.

Similar threads

K
Lost data, need some rear axle measurements
Replies
4
Views
320
Kernal
K
R
Pictures and measurements needed - PLEASE!
Replies
19
Views
2K
Ratten
R
JonChimpo
Intermittent trans oil / brake / battery light
Replies
14
Views
1K
JonChimpo
JonChimpo
andersonoverland
91' FJ80 Master Cylinder Bolts Measurements
Replies
2
Views
491
andersonoverland
andersonoverland

Users who are viewing this thread

Total: 1 (members: 0, guests: 1)

Share this page

Back
Top Bottom