FJ80 axle questions

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Roxtar

Roxtar

10 Year 15 Year
Joined
Jul 17, 2007
Threads
25
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94
I have a set of elocked FJ80 (FZJ80) axles and I'm trying to get info on them.
Web searching has just made things more frustrating.

What diffs are in these things?
I've heard everything from 9.5" to 8.875" in the rear and 8" to "non standard 8" in the front.

I'm also looking for a spool for the rear.
Does anyone make a spool for whatever diff is in it?
 
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Rears are 9 and front should be 8's...
I believe Marlin Crawler sells the universal flange.. if thats what you mean by spool...
 
MANUCHAO said:
Rears are 9 and front should be 8's...
I believe Marlin Crawler sells the universal flange.. if thats what you mean by spool...
Click to expand...

Every Land Cruiser from the 40 Series through the 80 Series has had a 9.5" rear.
The 40 through the 62 had a 9.5" front as well. The 8" LC front started with the 80 Series.

There was never a 9" rear in any Land Cruiser world wide.
 
jonheld said:
Every Land Cruiser from the 40 Series through the 80 Series has had a 9.5" rear.
The 40 through the 62 had a 9.5" front as well. The 8" LC front started with the 80 Series.

There was never a 9" rear in any Land Cruiser world wide.
Click to expand...

The truth.... you wouldn't believe how many people i've argued this with.
 
I suppose I should have specified every US spec Cruiser. The 70 Series had 8" front and rear, but it's a different platform than the 40/60/80 Cruisers.

In any case, there was never a 9" anything in any Cruiser that I know of.
 
Curious, during my web search on this axle, several sites claimed an 8.875" carrier came on the rear.

Know anything about this?
 
It might help to know more about the donor vehicle and where on this big blue ball you're located.

In any case I have never heard of 8.875" anything. Typically gear sets and 3rd members are described by the diameter of the ring gear. With that said I have never actually measured any LC ring gears so I don't have that information as first hand, but in EVERY SINGLE DESCRIPTION, they have always been referred to as 9.5" gear sets. If you browse to the aftermarket folks who sell this stuff, the 80 Series gear sets are 9.5" rear; 8" front. 40/60 series are always 9.5 front and rear.

Also sited in Rob Mullen's Cruiser FAQ "Regular Land Cruiser axle housings are similar to a Ford 9" and differential carriers are similar in construction to a Chevy 12bolt. The front and rear differential housings are both offset to the right in all models except some '58-62's which had centred rear differentials. They have an 9.5" ring gear. The axle shafts are 33mm in diameter (the same as a some Dana 60's) 1960-67 shafts had 10 coarse splines while 68 and later shafts have 30 fine splines. In 1968, the front axle CV joints changed from ball joints to Birfields."
 
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jonheld said:
It might help to know more about the donor vehicle and where on this big blue ball you're located.

In any case I have never heard of 8.875" anything. Typically gear sets and 3rd members are described by the diameter of the ring gear. With that said I have never actually measured any LC ring gears so I don't have that information as first hand, but in EVERY SINGLE DESCRIPTION, they have always been referred to as 9.5" gear sets. If you browse to the aftermarket folks who sell this stuff, the 80 Series gear sets are 9.5" rear; 8" front. 40/60 series are always 9.5 front and rear.

Also sited in Rob Mullen's Cruiser FAQ "Regular Land Cruiser axle housings are similar to a Ford 9" and differential carriers are similar in construction to a Chevy 12bolt. The front and rear differential housings are both offset to the right in all models except some '58-62's which had centred rear differentials. They have an 9.5" ring gear. The axle shafts are 33mm in diameter (the same as a some Dana 60's) 1960-67 shafts had 10 coarse splines while 68 and later shafts have 30 fine splines. In 1968, the front axle CV joints changed from ball joints to Birfields."
Click to expand...
Erik's Toyota Differential info
All the way to the bottom, under "electric locking diffs"

FJ80 axle questions - YotaTech Forums
Post #5
 
I don't know how to respond to that. I've never heard of anything other than 9.5" rears in any US spec Cruiser. I DO know that Karl Bellve is a king size douchebag, but other than that I can't really comment on actual ring gear diameter. I would reach out to some of the differential specialists that are vendors on this forum. Browsing a few of them, the installation kits that are sold for the FZJ80 electric rear lockers are all 9.5" kits. No choices for anything else.
 
could be they're measuring from different reference points. the toyota "8" inch ring gear actually measures like 7.8 or something like that. not a true 8". afaik, there has never been an 8.875" rear diff. only 8", 8.4", and 9.5..probably more in the newer tundra's and fjc/taco/runner..but im not well versed in those newer models.

if youve got elocked axles, why put a spool in it? you could just keep them locked. but i guess there may be a strength difference, in that case a spool might be better. but might as well find a non elocked set, and put one in there, or just weld it. what are the axles going into?
 
if you're buying a spool, sell me your rear elocker. lol. seriously.

stock gears are 8" high pinion front
afaik rear is 8.875 but it's called a 9.5 eventhough it isn't.
 
d0ubledown said:
if youve got elocked axles, why put a spool in it? you could just keep them locked. but i guess there may be a strength difference, in that case a spool might be better. but might as well find a non elocked set, and put one in there, or just weld it. what are the axles going into?
Click to expand...
Going in a desert go fast. Strength and simplicity are the issues.
No need for the complexity and weak link cause by the ability to unlock.


86tuning said:
if you're buying a spool, sell me your rear elocker. lol. seriously.
Click to expand...
I may be willing to sell the elocked 3rd if I can get something stronger to replace it.
 
Rear axle:
Commonly called the 9.5". Actual measurement varies over the years, but for aftermarket parts they are known as 9.5". Nitro Part number TLC-XXX-NG fit. It is possible to use GM 12 bolt mini spool in your existing carrier or re-drilled fulll spool (full float only). However, we also stock ARB Air Locker, Detroit Locker, Powertrax No-Slip, Lock Right, Auburn Pro LSD, and I even have a TJM Pro-locker available. US model FJ80 all 91-92, and some 93-94 use c/clip semi float axles. 93-97 FZJ80 with disc brakes are full float, and also have optional factory Electric locker. All us models come with 4.10 ratio.

Front axle:
Commonly called the 8" reverse or Highpinion 8". Nitro Part number R&P TLCF-XXX-NG fit. All us models come with 4.10 ratio. 93-97 models also had an available factory Electric locker. 95-97 models have longer outer birfield splines, thus thicker flanges. They are interchangeable if used together. Stronger chromoly birfields and axles are available. The carrier is 2 pinion and has a 50mm journal. Aftermarket Lock Right 1610 or Nitro FS TV6-30 spool will fit, though not suitable for full time 4wd. Also available are the Detroit Locker, ARB Air Locker, Tru Trac LSD, Auburn LSD.


Roxtar said:
I have a set of elocked FJ80 (FZJ80) axles and I'm trying to get info on them.
Web searching has just made things more frustrating.

What diffs are in these things?
I've heard everything from 9.5" to 8.875" in the rear and 8" to "non standard 8" in the front.

I'm also looking for a spool for the rear.
Does anyone make a spool for whatever diff is in it?
Click to expand...
 
ringpinion.biz said:
Rear axle:
Commonly called the 9.5". Actual measurement varies over the years, but for aftermarket parts they are known as 9.5". Nitro Part number TLC-XXX-NG fit. It is possible to use GM 12 bolt mini spool in your existing carrier or re-drilled fulll spool (full float only). However, we also stock ARB Air Locker, Detroit Locker, Powertrax No-Slip, Lock Right, Auburn Pro LSD, and I even have a TJM Pro-locker available. US model FJ80 all 91-92, and some 93-94 use c/clip semi float axles. 93-97 FZJ80 with disc brakes are full float, and also have optional factory Electric locker. All us models come with 4.10 ratio.

Front axle:
Commonly called the 8" reverse or Highpinion 8". Nitro Part number R&P TLCF-XXX-NG fit. All us models come with 4.10 ratio. 93-97 models also had an available factory Electric locker. 95-97 models have longer outer birfield splines, thus thicker flanges. They are interchangeable if used together. Stronger chromoly birfields and axles are available. The carrier is 2 pinion and has a 50mm journal. Aftermarket Lock Right 1610 or Nitro FS TV6-30 spool will fit, though not suitable for full time 4wd. Also available are the Detroit Locker, ARB Air Locker, Tru Trac LSD, Auburn LSD.
Click to expand...
Now THAT'S tech. (no offense intended for other posters here - thanks for all the help)
So a 30 spline GM 12 bolt spool will fit (with redrilled bolt pattern)?
 
The M/S GM12-30 Mini Spool will fit, and can even be used in semi float, the splines are tight because of pressure angle difference. This is a "budget" oriented mod. The full spool will fit if the flange is redrilled. In fact, Ben @ Slee runs a 35 spline version in an LC 9.5 and custom 35 spline mini truck bolt in axles. I'm working on being able to offer chromoly rear shafts for ALL the Toyota Full Float applications. I am considering going with a double splines shaft / seperate drive flange.

Oh, And the light duty 70 series / LC II / Prado / Bundera with LJ/RJ use 8" reverse front and 8" std rear. The HD 70 series like HZJ/FJ/FZJ/BJ/HJ use the 9.5 front and rear initially, and then later switched the front to the 8" reverse.




Roxtar said:
Now THAT'S tech. (no offense intended for other posters here - thanks for all the help)
So a 30 spline GM 12 bolt spool will fit (with redrilled bolt pattern)?
Click to expand...
 
axles

The full float spindle is too small for a 35 spline shaft. It would be possible in a semi float, but there is not enough demand for it. We will be doing high strength 30 spline shafts soon. We could also do 32 spline full float shafts to offer with the 32 sp arb ant TLC100-488-NG R&P


Tapage said:
what about some 35" splines rear axles for our beloved 9.5 3rd and housing . ?
Click to expand...
 
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