100 Series front diff/axle swap
Submitted: Sunday, May 27, 2007 at 15:44
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Mikee5 (QLD)
Does anyone know if the live axle from an 80 series will fit under a live axle 100 series. I am thinking that the 80 series had a stronger diff and I could do a swap. I know that the hubs are not the same (6 stud or 5 stud). Are there any insurmountable obstacles to the swap. I think that a Nissan/Toyota diff splice is about $2k to $3k. I am just curious if anyone has looked into this or actually done something like it?
Reply By: Andrew from Vivid Adventures - Sunday, May 27, 2007 at 15:48
Sunday, May 27, 2007 at 15:48
Why was that again?
Has your front diff actually failed?
AnswerID:
242702
Follow Up By: Mikee5 (QLD) - Sunday, May 27, 2007 at 16:55
Sunday, May 27, 2007 at 16:55
No it hasn't failed and I don't drive it to make it fail but I saw the one on the Kedron Caravans DVD sheet itself in front of the camera. Mind you they were working it hard.
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Reply By: Member - Tour Boy- Sunday, May 27, 2007 at 16:10
Sunday, May 27, 2007 at 16:10
Hi Mike,
Wasn't it that the IFS front diffs are only known to break in the V8's? Not the rigids
Tour Boy
AnswerID:
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Follow Up By: Mikee5 (QLD) - Sunday, May 27, 2007 at 16:59
Sunday, May 27, 2007 at 16:59
My front diff is smaller than the rear and it has the high set pinion so I am guessing that it is the type that fails in reverse.
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Follow Up By: Des Lexic - Sunday, May 27, 2007 at 20:57
Sunday, May 27, 2007 at 20:57
Tour Boy, The solid front axles have also broken as I'm sure that Roachie will remind me yet again.
Mind you the circumstances of that one were a bit different from the IFS. Same problem though, the front diff is the same as a Hilux
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Reply By: BennyGU - Sunday, May 27, 2007 at 16:24
Sunday, May 27, 2007 at 16:24
Another thing to consider is that the actual wheel studs in the 80 series have got a reputation for snapping in heavy four wheeling. In the 100s they were increased from 8 to 10mm diameter to remedy this.
AnswerID:
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Follow Up By: Mikee5 (QLD) - Sunday, May 27, 2007 at 17:00
Sunday, May 27, 2007 at 17:00
I would be hoping to keep the 100's hubs including the studs, just replace the inner part of the axle housing and diff.
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Reply By: Roktruk - Sunday, May 27, 2007 at 17:46
Sunday, May 27, 2007 at 17:46
I may be wrong, but aren't they the same thing? The 80 has a smaller front diff (7 1/4 inch?) with a high pinion. What would you really be trying to achieve? Are there any real stats on how many 100 series diffs have failed, or is it all ".....I have a mate who knows someone...." My understading is they tend to fail, under load, in reverse, with the front
wheels turned and a locker engaged.
I think the rationale for the 5 stud-6 stud swap was probably driven more by $$$$ than being stronger. I've never seen broken front wheel studs - a CV will let go long before a wheel stud if they're tightened properly.
AnswerID:
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Follow Up By: dieselup - Sunday, May 27, 2007 at 20:22
Sunday, May 27, 2007 at 20:22
I agree Roktruk , sometimes we tend to get wound up in what might happen
If we use our vehicles as we please we would probably find that 90% will never fail ,the other 10% will
You just have to work out which group you want to be in
Diesel
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Follow Up By: Steve from Top End Explorer Tours - Sunday, May 27, 2007 at 21:18
Sunday, May 27, 2007 at 21:18
I have owned 1 80 series and now own 3 100 series 1 78 series the diff centers are identical.
There is nothing wrong with these diffs, if you don't drive your car like you stole it.
Last year I reverse snatched an OKA with no effect on the front diff, in the past I have reverse snatched a coaster bus and several 4wds,all with out detriment to the front diff, IMOA it is a furphy that they break under normal driving conditions.
Steve.
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Reply By: Topend - Monday, May 28, 2007 at 06:03
Monday, May 28, 2007 at 06:03
If you are worried about the front diff failing, I believe fitting an Airlocker will 'toughen it up'. Would be cheaper and you would have a locker too.
Topend.
AnswerID:
242814
Reply By: ADM - Monday, May 28, 2007 at 09:57
Monday, May 28, 2007 at 09:57
You don't have to drive a 100 like you stole it to break the front diff. I broke one winching up a wet track with ARB locker, the vehicle was under very minimal load. They are weak and that's a fact!!
We have a guy in our club who has a 100 with front and rear 80 series diffs. From my understanding they are a easy swap without major mods. The 80's front diff is a better unit, how many of these have you heard of breaking compared to the 100??
AnswerID:
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Follow Up By: Steve from Top End Explorer Tours - Monday, May 28, 2007 at 11:10
Monday, May 28, 2007 at 11:10
Of course there an easy swap.
They are exactly the same diff, the reason I now this is because last year I bought a wreck, I decided to rebuild the front and rear diffs in order to have spares.
When they send you the crown wheel and pinion, the pinion flange has the holes to suit a 80 series and a 100 series tail shaft.
Steve
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