90_4runner

i just bought a 1976 toyota landcrusier axle and want to know whats the difference between them two axle from a 1976 landcrusier axle to a 79-85 toyota axle b4 i eliminate my ifs from my 90 4runner to do a sas with the landcrusier axle? any information well help me and also please show me step by step on doing my sas conversion too i might need a lots of helps from yota team peoples.

DeathCougar

iTrader: (23)

Land cruisers are spring under, and have a 8.8" diff

Trucks/4Runners are spring over and have an 8" diff

The landcruiser axle is also quite a bit wider.

dropzone

iTrader: (6)

For your SAS try searching a little bit, here is an all Toyota Search Engine that hits over 50 Toyota technical sites.

The Links below all offer kits and write ups too...
All Pro Off Road
Marlin Crawler
Trail Gear

tc

DeathCougar - you're thinking rear and 80 series. I'm assuming this is front and 1976 will be an FJ40 axle.

The early Landcruisers are not listed on the usual site for diff info:
http://home.4x4wire.com/erik/diffs/

I'm sure it's on the Pirate FAQ, but I don't have it bookmarked here, will have to look it up when I get on later from home.

My guess is that it's an 8" third, a lot NARROWER than even an '85 axle, which is going to make it VERY much narrower than you rear axle... in other words, this may be about the worst choice for an SAS.

I would be remiss if I didn't ask why do you think you need a SAS anyways?

DeathCougar

iTrader: (23)

uh no, i am thinking 1976 Landcruiser. Since they did not start the 8" Hi-pinion until 1991 in the FJ-80, the 1976 FJ-40 cruiser will have the same 8.8 diff front AND rear that the FJ-60 cruiser had, albeit with a different ratio. In fact, they are the exact same diff and can be swapped front to rear and rear to front, just like on the trucks.

As for width, thats not correct either, as the Fj-40 front axle is either just as wide or WIDER than the mini-truck axle (i cannot remember the exact widths)

Belize Off Road Team

well for one thing i can tell you is the diff wont work. it has a diff ratio so you would have to do something about that. as for the width i dont think it matters unless it is a considerablely wider. but i think the largly different ratio would have a bad effect. that's just my 2 cents

DeathCougar

iTrader: (23)

also not necessarily true.

the 1976 FJ-40 used a 4.11 ratio. If he has a 4.10 ratio in his truck, it will work and not affect anything.

tc

http://www.pirate4x4.com/forum/showthread.php?t=459180

From Pirate:

FJ40 axles are 57" front, 56" rear. FJ60 are 60". FJ80s are 63". You would want a 76 plus FJ40 axle--prior to that they had front drums. 1976-1978 were 4.11 R&P, 1979-1987 were 3.73, 1987-1997 were 4.11 again. In 1978, the pinions switched from 10 spline (weaker) to 30 spline. The birfs in 1976-1978 are slightly smaller than 1979-1990, which are same size as mini truck
ones. You can run Longfields in any of them.

Never thought 40's would be that wide - it's a better match than a minitruck front axle...

DeathCougar

iTrader: (23)

soo what you are saying is....

I was right!

pwnt

Its a better match width wise, but you still have to deal with spring under, so he will have to reweld his spring perches.

90_4runner

well my 76 landcrusier axle already came with shim perchs on top odf the axle so yeah no worry about that and back high steer instead of front on the axle. and for my gear ratios i have 5.29 yukon in the rear v6 axle. But i also did a reasearch on the axle ring size i saw most site was 8 7/8 on the differential ring gear, am i right or is it 8.8" ring size?
Also i just know finished my rear 63" chevy leaf swap. Just researching to see what i need to do on my sas swap.

well my friend told me that it don't matter if the landcrusier diff is a lil biggger because as long as i have the same gear ratios then it's all right. and he also told me that the bigger the diff. the better it can handle.

well if the landcruiser axle that i have s longer than the pu toyota axle then thats good i might not need wheel spacer right guys?

DeathCougar

iTrader: (23)

8.8"=8 7/8 (give or take)

tc

Rear axle is 58.5", the front is 57", so at most you would need 3/4" spacers, not the usual 1.5" spacers, but I probably wouldn't even worry about it. If you wanted the front wider than the rear, you could use your IFS hubs on the SFA.

AxleIke

FJ-40 is not 8". Its 8.8.

40's use the same diff front and rear.

Good luck with the caster angle.

DeathCougar

iTrader: (23)

Yea, i think TC must be breathing a little too much of that thin CO mountain air these days

tc

I keep putting faith in that Toyota would never go backwards and have a subsequent generation weaker than before ... I knew the 80 series had 8" in the front and 9ish in the rear, so figured the earlier ones were 8" ...

But then, they DID change from a FF to a SF front end going from 95-96 ...

90_4runner

the landcruiser axle already had warn brand hubs so i dont really need the stock hubs.
But thanks DEATHCOUGAR im just making sure that im not mistaken the differentials ring gear so yeah when im ordering the yukon gear i should ask them for the 8.8" ring gear.

90_4runner

well to all you guys again i have ask this one guy that built LC axles, he had told me that the LC axle R&P is either 9 1/4 or 9 3/4 i forgot.

bigt

im using a fj-62 axle for my s.a.s its a 4.10 ratio and its a better match width wise...
im still researching and planning but have the axle and almost the truck!

waskillywabbit

iTrader: (-1)

Research then buy will save you money in the future. While lots of things will fit and work on that axle I think the fact that it is not used among the masses should clue you in.

Some things that work are not necessarily the best viable option.

I think you are creating yourself a future headache(s).

Good luck!

90_4runner

thats y im trying to sell it know.