Front Axle Lengths for Post 1990 70 Series

[suzolla]

Hi,
I am trying to find out the correct front axle half shaft lengths for post 1990 70 series.
Has anybody got some spares that they can measure for me.
Have got a couple of lengths off the net but not sure if they are correct.
The lengths I have are 767mm and 414mm, have also been given 770 and 408.
If you can measure the lengths of the bare shafts that would be great.
Also if possible it would be good to know the assembled length of axle and CV from the thrust face on the CV to the end of the axle that goes into the diff.
Going to see if i can get some Longfields to suit.

Would there be any interest in some Longfield 30 spline Supersets for your post 1990 70 Series trucks

Thank you in advance
Cheers
Tim

[jeremy]

http://home.comcast.net/~dtay/axle_specs.html

...I've measured prado axles in the past, and they confirmed the info in that link, although I can't remember how accurate they were. I can measure my spare set, if prado axles are what you're after.

Also note that the prado axles use the same inner axle seal as an 80 series, which means the axle needs to be a larger diameter at the seal surface (than hilux, FJ40 etc).

[suzolla]

Hi Jeremy,
Thanks for that, those are the sizes I have seen on the net.
Thanks for the heads up on the seal sizes.

Not sure about the pre and post 1990 lengths now as Brynn has an LJ71 1985 that are about the same length as the post 1990 lengths and was about the same length as the short side one he borrowed off you at the Woodhill 24hr. His LJ71 has the small seal size.
Yes if you were able to would be keen on the Prado axle lengths and CV thrust face to inner end of axle length.
What model and year is yours.

Thank you
Cheers
Tim

[IcedJohnno]

Not sure about the pre and post 1990 lengths now as Brynn has an LJ71 1985 that are about the same length as the post 1990 lengths and was about the same length as the short side one he borrowed off you at the Woodhill 24hr. His LJ71 has the small seal size.
Yes if you were able to would be keen on the Prado axle lengths and CV thrust face to inner end of axle length.
What model and year is yours.

Thank you
Cheers
Tim

Hey Tim.
Maybe the change-over year is later than 1990.
The Prado changed from a LJ-7x to a KZJ-7x around late 92, early 93, I think. (someone will correct me if I'm wrong) Major change from LJ to KZJ was the 2L-TE to the 1KZ-TE engine

At this point the radius arm design changed, as well as the heavier rear springs under the back of the KZJ-78.
I know on my 94 KZJ-71, the rear axle outer bearings are different from a Hilux, as are the outer axle seals.
It could well be that the front axle lengths, knuckles etc changed at this point as well.

Others may be able to comment more. OldBlue perhaps?

Keen to hear more about this upgrade, as I may well be after a set in the future, once the money starts to come back again....
Currently I am managing to break the locating dowels on the front hubs. Even after a spark-eroded removal and factory dowel replacement. Happens when throwing rocks with my big chains. Twice heard a bang, when cutting through deep snow. Twice had a broken dowel. This is the reason why I have stayed with 31's so far. Keen to know if there is an upgrade for this area as well.
Cheers John

[jeremy]

Opps, I forgot about this, sorry I'll go dig the axles out and measure them this arvo.

Ours is a 92 LJ71, which is different from Brynns LJ71 ...has the bigger cvs, different suspension, radius arms etc. From what I've seen/read, the later model LJ's are the same as the KZJ's in the drivetrain, just a different diff ratio.

Currently I am managing to break the locating dowels on the front hubs.

Electric, or manual hubs? If you have the aisin manual hubs, it might be the studs working loose?

[IcedJohnno]

Opps, I forgot about this, sorry I'll go dig the axles out and measure them this arvo.

Ours is a 92 LJ71, which is different from Brynns LJ71 ...has the bigger cvs, different suspension, radius arms etc. From what I've seen/read, the later model LJ's are the same as the KZJ's in the drivetrain, just a different diff ratio.

Currently I am managing to break the locating dowels on the front hubs.

Electric, or manual hubs? If you have the aisin manual hubs, it might be the studs working loose?

I am still running the factory electric hubs. Shortly to be both manual and electric thanks to OldBlue.

Possibly could be due to loose studs. I had a rebuild done via an insurance job that I was not impressed with. Loose wheel bearings, a top shock mount bolt lost! and a bent sway bar and steering shock not replaced. Grrr must talk to them soon.

Prior to that someone worked on the lecky hubs other than me, who did not tighten the studs like I do.

[jeremy]

Ok, here we go...

Short side = 414mm
Long side = 767mm

The axle seal surface measured at 34.95mm, so I guess its supposed to be 35mm (when new)?

I measured both a prado and an FJ40 CV, and the distance from the thrust face, to the surface on the inner star where the circlip sits up against (the big one on the axle), was the same - around 54mm.

I also measured from that big circlip to the CV end of the axle on both axles (prado & fj40) to confirm they were the same - they were close enough, about 0.17mm different by my rough measurements, around 31.5mm.

Hows that? Anything else you need to know. Just thinking about it now, I guess I should've measured the position of the axle seal bit?

[Sadam_Husain]

I am still running the factory electric hubs. Shortly to be both manual and electric thanks to OldBlue.

Possibly could be due to loose studs. I had a rebuild done via an insurance job that I was not impressed with. Loose wheel bearings, a top shock mount bolt lost! and a bent sway bar and steering shock not replaced. Grrr must talk to them soon.

Prior to that someone worked on the lecky hubs other than me, who did not tighten the studs like I do.

sorry for the threadjack and I know your pretty engineering savvy but are any of the locating holes for the dowels or the holes for the studs elongated

[suzolla]

Hi Jeremy,
Thanks very much for that, very useful, don't worry about the seal surface position.
Cheers
Tim

[Jerry]

fix for the breaking dowels is to swop the stub axel (or thingy) for a hilux one (or a 85-89 lj) one, the grooves on the edge need notching out slightly which will allow the factory hubs to bolt on without the adaptors, I have some pics in an old thread somewhere.

did this conversion on my old LJ

[juz]

Johnno hasnt got the adaptors Jerry, his hubs are factory electric ones. Your right though, part way through doing that same swap today with Hilux stubs and aisin manual hubs.

[jeremy]

Hi Jeremy,
Thanks very much for that, very useful, don't worry about the seal surface position.
Cheers
Tim

No probs.

...I only just noticed you listed those same dimensions in your original post, so somebody knew what they were talking about

Keep us posted. I have some 27 spline longfields sitting on the shelf that I got in from the states when I bought a set of ring and pinions, but seeing Brynn's broken axle gets you thinking

[suzolla]

Keep us posted. I have some 27 spline longfields sitting on the shelf that I got in from the states when I bought a set of ring and pinions, but seeing Brynn's broken axle gets you thinking

Yes it does, I checked with Longfield to see if they would do custom length 27 spline axles, unfortunately they said they don't.
Still looking at options.
Cheers
Tim

[Jerry]

What about Brian Howat?

[IcedJohnno]

PMed you some info Tim re a quality automotive bespoke component manufacturer here in NZ

[1hamish1]

[quote]Keep us posted. I have some 27 spline longfields sitting on the shelf that I got in from the states when I bought a set of ring and pinions, but seeing Brynn's broken axle gets you thinking [/quote



Yeah didn't take much to break it that night and I was bloody lucky you had that spare. The trucks still sitting on axle stands..... You wouldn't want to part with those longfield axles would ya Jeremy? Brynn

[jeremy]

Yeah didn't take much to break it that night and I was bloody lucky you had that spare. The trucks still sitting on axle stands..... You wouldn't want to part with those longfield axles would ya Jeremy? Brynn

I only have the CVs, no axles (unfortunately)

Spending the extra $s on 30 spline axles is probably the way to go. I would've been happy with some genuine toyota cvs, but at time time the price difference was next to nothing so I thought buying 27 spline longfields with a lifetime warranty was the better option ...but I didn't figure the axles would be that easily broken. Of-course, since then, l've heard a few stories of broken axles

[suzolla]

Hi,
Regarding manufacture of axles, yes there are probably a few places in NZ the can make them, trouble is they would not be covered by the same warranty as the Longfield ones plus would not want to affect the warranty on the CV's so will keep heading down the Longfields track.

Thanks for the help and suggestions though, much appreciated.

Cheers
Tim

[lexlux]

hi Tim , 770 & 411 & my front diff is out of a 1988 Lj 71 cheers .

[suzolla]

Thanks for that, the same lengths as Brynn's.
Appears to be 2 slightly different lengths depending on the year it is and perhaps related to the seal area diameter.
Maybe
Pre 1990 seal dia 33mm and axles 770 and 411 long.
Post 1990 seal dia 35mm and axles 767 and 414 long.

Interesting that the total length is the same but there is a 3mm off set.
Cheers
Tim