FJ40 Full Floater Axle Build (IH8C-CLIPS)

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J Mack, that is a great idea!

About how much material needed to be machined away?
I'm guessing it wouldn't be enough to weaken the spindle really. Could use a TG Chromoly spindle on the rear for a little extra strength too.

This just made my rear axle build simpler & easier! :-)

Allen
 
I can measure an 84' FJ60 rear WMS to WMS later today and post up that dimension too.

Don't know why I didn't measure the WMS to WMS of the 87' FJ60 front and rear axles that I have here I'm working on before pulling them apart! :bang: I love data, measurements & dimensions, so can't believe I didn't measure them first!

Allen
 
The 40 axles are supposedly only -.10" different front to rear (55.7"f, 55.6"r). EDIT: 55.12"f, 55.28"r.
 
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:worms: What the heck, nothing on my drive train is stock anyway. I'm just gonna make some stuff up!o_O

@Stumpalama, keep working so we can see how it turns out.
 
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Ok, I stand corrected.
My front axle is 58 3/4", 58.5" must be right then. My rear axle is less than an inch wider than the front.
 
J Mack said:
I just built this same rear end for my 55 and had RVC make some 300m axles. I tried to run the bearings wet the first time out but RCV flanges leaked so I installed seals and now I running the bearings in grease.
Pictures here: Target carrier




Axle drawings,


View attachment 1164474
Click to expand...

I just wanted to bring this image forward since I am measuring for shaft length and need a reminder.
 
I'm pretty sure the FJ40 is 57" front and 55" rear.

The FJ60/62 and FJ40 are the identical on short side.
The FJ60/62 are lengthened 2-⅝" to 2-¾" so 59-¾ ish according to Lcwizard.

I didn't get the FJ60 rear width today but will try get it tmw.

Allen
 
abosely said:
About how much material needed to be machined away?
Click to expand...


I don’t remember exactly how much but off the top of my head it was around .100”. I used the TG cromo spindles but it’s in a noncritical area so you’re not jeopardizing strength if you use factory spindles.
 
J Mack said:
I don’t remember exactly how much but off the top of my head it was around .100”. I used the TG cromo spindles but it’s in a noncritical area so you’re not jeopardizing strength if you use factory spindles.
Click to expand...

Thx, it didn't look like much needed to be removed. And as you said, a non critical area, I'm going to use TG cromo spindles & hubs in the rear at least, probably front too, just cuz a little extra strength is comforting! :-)

Allen
 
Stumpalama said:
I just wanted to bring this image forward since I am measuring for shaft length and need a reminder.
Click to expand...


I butted my FF flanges up to the backing plate flanges on the housing and this netted 1.25” total or .625” per side wider than the factory rear end total width, you’ll need to adjust for your FF flange location. This picture shows what I’m talking about.


housing.webp
 
Stumpalama said:
Feels like i'm at work. :rimshot: Source:TLC FAQ - 4.2 Specifications
And actually, when I do the conversion of 1400 and 1404mm to inches, I get 55.12" and 55.28", so .16" difference
Click to expand...

That link doesn't work, but if it matches up to the "track width" that is posted randomly, those numbers change a lot depending on which diagram you are looking at (including the LAND CRUISER book I have at home). I've seen variations in reported widths from the soft top to the hard top 40 series trucks. And those definitely were not different. Just something to think about.


db45f83cfa4984a0e41d142e44e4bff1.jpg

toyota-land-cruiser-fj45-2-jpg.125212
 
I'll see if I can update the link...
But, what I hear you saying is that there is no definitive source for accurate axle measurements.
 
Not currently on paper that I'm aware of.

Tape measure makes the most sense to me :)
 
Just based on lengths of inner axle shafts, the difference in a 60 and 40 front axle is 2.5" (29 to 31.5" length of the DS inner axle) so if my measurement of 58.5 is correct, a FJ40 front axle is about 56" WMS (which actually matches the 70 series axle I did measure which should be the same as a 40 series)

I had the 70 series at 56 front and 55 rear
 
so then rumors of the fj55 front being 57" must be incorrect as well if they take the same inner axles as the 40/70 series...:deadhorse:
 
Pigs always add an inch or two ;)
 
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