Outer Limits 4x4 Board

Out at Ormeau today with my mate JOHNZ from this forum.

Poor guy has busted 2 front diffs in his 100 series in the last two outings .

First time it was unlocked and he was c-r-a-w-l-i-n-g up one of the jump ups at Ormeau. He rolled backwards a touch and then went forward, and bang front diff goooooooone.

Second time he was going even slower. Had an ARB installed but was not in, as the terrain was easy.....bang front diff goooooooone.

This time he put a Detroit in. Walked...and I mean w-a-l-k-e-d around Ormeau today. Nothing hard at all. Then we did the lower waterfall track. Came to the tea-cup. I yawned my way up in the Fender. Next dude in a GQ got up with a little bit of protest. JOHNZ starts to climb - nice and slow. Did not get there, so back down and this time try a slightly different line. He would not have been at more than 2000rpm in low first, and bang front diff goooooone.

If I was not standing right beside the driver's door I would not have believed that a diff could break under such piss-poor, puncey, lame-arse conditions.

WTF is going on with Toyota front diffs?

This is the 3rd diff in 3 trips . I wanted to burn the farken thing...and its not even mine.

Seriously...aside from putting Nissan shit under it, what are the options for his front end?

Micka

cryo treat the cw and p from www.toyotasuperaxles.com

not much i know that u can do with them.. they are much smaller than the rear and they can only take so much.

Was the diff repaired under warranty??

Daisy wrote:cryo treat the cw and p from www.toyotasuperaxles.com

not much i know that u can do with them.. they are much smaller than the rear and they can only take so much.

Was the diff repaired under warranty??

He did the first one and Toyota did the 2nd under warranty.

Another dude busted his 75/79 front diff too. I am not sure why, but he tried to reverse up a hill while winching JOHNZ up said hill...and all the while he had tied the rear of his ute off to a big-arse tree .

Micka

This is the same diff centre i run in the front of my buggy and i have never broken one. I have ran them out of oil and dropped the centre pin out of the ARB which took out the gears but utherwise im yet to damage one at all. He is doing something wrong or the person setting them up is doing something wrong. They realy are not that weak. Usually they fail in reverse but im pretty soft on mine in reverse.

RUFF wrote:This is the same diff centre i run in the front of my buggy and i have never broken one. I have ran them out of oil and dropped the centre pin out of the ARB which took out the gears but utherwise im yet to damage one at all. He is doing something wrong or the person setting them up is doing something wrong. They realy are not that weak. Usually they fail in reverse but im pretty soft on mine in reverse.

thats the first time ive heard someone say their not weak from what i have seen and been told they are breaking in lots of trucks in very similar situations

RUFF wrote:This is the same diff centre i run in the front of my buggy and i have never broken one. I have ran them out of oil and dropped the centre pin out of the ARB which took out the gears but utherwise im yet to damage one at all. He is doing something wrong or the person setting them up is doing something wrong. They realy are not that weak. Usually they fail in reverse but im pretty soft on mine in reverse.

Seriously Tony...you know that creek. It is piss easy. He was driving it like an old woman and it busted right before my eyes. This diff was installed by Toyota under warranty, and as you say, may have been set up incorrectly. But 3 diffs in as many trips?

His 100 does weigh a fair bit more than the budgie, though.

I could understand if he was romping it and bouncing. But this was really, really piss-poor.

Micka

Is there a differenct between the 80 and the 100? I thought they were the same.

I had my 100 up Queenslad Gate, and a heap of other hard tracks and never had a problem, it was twin factory locked.

My 80 had a 6.5L V8 TD and 38" swampers, never a problem.

Both were auto, so maybe it is shock loading causing the problem?

is the 100 series front diffs the same as a hilux,(size)..... if so thats alot of truck on that small diff, as good as they are and i think weight has alot to do with it.

serg

I would think that the full proof way would be to put a Nissan front diff in. I dont think going the other way will be as strong still. It is a nice 100 series too.

LudaCris

fester was bustin his 80 diffs every run just about ... even seen him do both at the same time ... got nissan diffs under it now now its just a CV problem

AFAIK the only difference between 100 and 80 series front diff is the ratio (there are differences in cv's, hubs etc though). 100s are 4.3:1 and 80s are 4.1:1

They are both high pinion with 8" crownwheel (hilux dia).

with the 100s on the front diff i think it was mentioned here before, ya got to get rid of the collapasable spacer on the pinion and use a solid 1, this is why they break, the spacer crushes and climbs over the crown wheel causing teeth to smash.

My mates done three or maybe four front diffs in his 100 series now, there is something wrong with them....they're piss weak!

Are we talking solid or IFS, I assume you are talking solid as the IFS are well known for breaking under little or no load.
We don't see the solid axle here.
J Top

run a stronger carrier (ARB or Detroit)
swap colapsable spacer for solid one

redrill and tap to take 2mm bigger carrier bolts.

do it all up to torque specs

aparently that helps

or there is a dude on 4x4monthly that retrofits a GQ center into em

I thought haveing a locker solved the diff problem. So maybe a bent axle is the cause.

Has anyone tried putting a early 75 series front diff in one.

J Top wrote:Are we talking solid or IFS, I assume you are talking solid as the IFS are well known for breaking under little or no load.
We don't see the solid axle here.
J Top

Good point Im not running the IFS diff centre in my buggy

RUFF wrote:

J Top wrote:Are we talking solid or IFS, I assume you are talking solid as the IFS are well known for breaking under little or no load.
We don't see the solid axle here.
J Top

Good point Im not running the IFS diff centre in my buggy

Walker Evens runs IFS!

Anyway, i think its probably the IFS. If so they are probably similar to the old IFS 4Runners. Very weak!

hahaha thats piss poor even old rovers can do better than that. the bloke that built sangas diff before xmas said if it was not for toyotas his diff shop would close.

The electrics crap themselves long before the diffs.

Its a solid axel.

Maybe changing the spacer would help...but at this point he needs to get the detroit out of it and take it back to Toyota for another warranty claim.

The other guy in the ute sheared the splines on his axels on both sides. I have never seen/heard about that happening. Both front axels at exactly the same time.

Micka

A Guy in our club has a 100 locked front and rear and has also busted about 4 to 5 front centers toyota changed the first two i think but they just seem to be week as piss, i herd a rumour that the front center in those use a composote material for the gears dont know if that is true or not.
i,ve got a hilux running 38's locked front and rear RB 30 nissan engine t700 with a bundera high pinion and 30 spline longs and havent had a problem with the center so maybe u can put a older center in it to beef it up a bit! just an idea or trade it for a nissan

I've got friends have done the same, regularly take out the front diff, as I keep telling him, the problem is you aren't supposed to go 4wding, they're meant for shopping. ;-)) He even broke a diff climbing a gutter to park on the nature strip.
I was under the impression that a solid spacer was mandatory when fitting a locker due to high pinion loads which will compress the collapsible ones.

Are these guys breaking crownwheel and pinions or side gears, or just the pin

Ive been making custom front housings for 78/79's, 80's and 100's for years now when the owners get sick of breaking front diffs centers.
The combination of Nissan front centre, Toyota CV's hubs brakes etc has proven to be a great combination as ive made 18 custom housings to date and never heard from a customer to have had further problems only good reports that they given the 4B heaps and its still goin. It is an expensive fix as you need a new locker , front centre and housing and with some models of cruiser with the 4.3:1 ratio diffs you need to do the rear centre as the Nissan ratios only match on the 4.1:1 ratio and Nissan's have a good range of factory ratio's to pick fro ie 3.7:1, 4.1:1, 4.375:1 & 4.65:1. The housings ive built are a staight forward replacement for the original and bolt straight in no further mods required.

Wally

i've repaced 3 for seprate customers and they all made a mess of the crounwheel & pinion in the hi-pinion 100ser solid axle front diffs

RUFF wrote:This is the same diff centre i run in the front of my buggy and i have never broken one. I have ran them out of oil and dropped the centre pin out of the ARB which took out the gears but utherwise im yet to damage one at all. He is doing something wrong or the person setting them up is doing something wrong. They realy are not that weak. Usually they fail in reverse but im pretty soft on mine in reverse.

I should learn to shut my mouth I drove it for the first time today since the finals and it appears as though i have blown the Crown and Pinion in the front

My 80 double locked 3 years havnt broken front yet even running 33 inch JTs

Paul

Pauwolf wrote:My 80 double locked 3 years havnt broken front yet even running 33 inch JTs

Paul

Same here except I only run 32's, Haven't even done a C.V yet, touch wood.