how similar are the rear axle's of a 80 and a 100 ?

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GX-R

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I'm by no means a mechanic , but i always wondered how similar are the rear axle's of an 80 and 100 .

They look identical in this photo ?

But i know they can't be because the 100 is wider .



the 200's rear end seems much bigger , i wonder if it can even fit on an 80 ?

 
This was discussed somewhere around here recently... The 100 axle probably is wider and the shafts are 32-spline whereas the 80 shafts are only 30. They do use a similar suspension linkage and I've heard the rear springs are cross-compatible, but someone else will have to confirm.
 
While the axles look sort of similar, they are completely different. Biggest difference is the Full Float vs Semi float, but also different in the oil seals, bearings etc. 80 is a much more user friendly design.
 
We have FF on the 100 rears .. but they are 5 lugs and as stated before 10mm vs 8mm rings are different too .. mean 3rds internal are complete different ..

200 series rear it's centered ..IIRC
 
Tapage said:
We have FF on the 100 rears .. but they are 5 lugs and as stated before 10mm vs 8mm rings are different too .. mean 3rds internal are complete different ..

200 series rear it's centered ..IIRC
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I'm a noob when it comes to car mechanics , but , what is the difference between a float and semi float axle , and what is better .

Would you consider the 200 rear axle design to be superior to that of the 100 series ?
 
Full FLoat is desirable. The hubs rid on a spindle and the axle shafts only serve to transmit torque to the wheels. It is very similar to the front wheel set up.

In Semi-Float the Axle shaft turns on a single bearing, and the shaft both bears the load and transmits the torque. It's generally not as strong for load carrying, and in the case of a 100 series it is much harder to service.

I think the 200 series is similar to the 100 series except the differential itself is bigger. Pretty sure it's a semi float design.
 
Don't think any axles in the Land Cruiser after 1993 ish were semi-float...
 
Semi float means the vehicle's weight rides on the axle shaft

full float means the vehicle's weight rides on the bearings.

full floating versions of the same axle will be stronger. full float also means easier maintenance.

the 200 series diff is a 10.5 ring with 36 spline ~1.5" shafts, semi-float. It should be more quite a bit stronger than the 9.5" rear.
 
thank you for the information , very helpful !

Why did toyota go semi float in the later models ?

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edit ?

100 , 200 semi float rear axle !

later 80s full float rear axle ?
 
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GX-R said:
Why did toyota go semi float in the later models ?
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Other way around. The earlier models (up to '92 and a few '93s) were semi-float and the rest since have been full-float.
 
GX-R said:
thank you for the information , very helpful !

Why did toyota go semi float in the later models ?
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Less expensive to make, and assemble. Most people buying luxury Cruisers don't do their own service, so the easier service is a moot point.

On the heavy duty Land Cruisers like the 70 series, still has a full float axle.

I think it's an anomaly that Toyota put the full float on the 80 series. Glad they did, but not sure why they did.
 
Eicca said:
Other way around. The earlier models (up to '92 and a few '93s) were semi-float and the rest since have been full-float.
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Only the 80 series. In the USA and most other markets the 100s and 200s have semi-float axles.
 
Cruiserdrew said:
Only the 80 series. In the USA and most other markets the 100s and 200s have semi-float axles.
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Whoa... I did not know that. Interesting. I wonder why they chose to go that route.
 
very interesting , sad to see the land cruiser lose its offroad abilities each generation . I think the next land cruiser ( 300 series ? ) will actually be IRS and probably lose the body on frame set up .
 
GX-R said:
very interesting , sad to see the land cruiser lose its offroad abilities each generation . I think the next land cruiser ( 300 series ? ) will actually be IRS and probably lose the body on frame set up .
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I highly doubt it'll become IRS, and even more doubt that it'll be unibody.

As for losing off road abilities, there's a whole lot to offroading beyond axle strength. You could get all the different generation LC fanboys to argue over who's got the best one. The 200 can go offroad, it just wasnt made to crawl over rocks.
 
Ive seen 200's crawl over rocks
 
I'm sure the 200s are great offroad, but we're not going to really see it till guys like us can afford them and beat them. I can see IRS, and if you have IFS, you might as well do the rear too. I have a Ford Expedition with IRS, and I love it for things that I don't do with my 80. I don't see unibody coming ever though.
 
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