Outer Limits 4x4 Board

I broke my front diff gears in my 105 series and put a nice dent in the locker housing these centers are just to weak I thought I would have broke a cv before the center

Has the centre failed or has the CW tooth come off?

joel HJ60 wrote:Has the centre failed or has the CW tooth come off?

i think the locker is OK still just broke the crown and pinion gears I bought a 2nd hand diff and have stripped the carrier out I will get my diff guy to swap the locker over and check to see if the locker still works ok

These things happen if you play hard....the c\v in a 105 is large, drive plates have no give...so the ring is the next weakest link one other thing you can do is machine up a solid spacer inplace of the collapseable one in the pinion bearings... Aftermarket gears might help too 4.56 would have less teeth on the ring, so thicker lands....the 4.3 has 43 teeth, 4.1 in an 80 has 41 same diameter ring thicker lands....and they were known to break easy enough...
Andrew

Seen exactly the same happen on a 79 ute dunno if there the same though.

Asked my diff guy about the weakness of the front diffs and he said he set them up with more engagement of the pinion into the crown wheel.

He said he never had a problem after this?

Matt

SIMMO84 wrote:Seen exactly the same happen on a 79 ute dunno if there the same though.

If hzj79 same diff and ratio.

try pegging the diff to limit the amount of flexing the crown wheel can do. Did you do that going forward, and or backwards?

Reddo wrote:try pegging the diff to limit the amount of flexing the crown wheel can do. Did you do that going forward, and or backwards?

I hid going forwards I no there weak in revers so I try not to give it any curry in revers

well I went for a wheel at Appin today first time off road since I fitted the new/second hand crown and pinion and just my luck it up again same noise coming from front diff what is cousing this to happen? I cant aford to put new diff gears in every time I go off road.

have a talk to jmac (john) and see what he has to say, thier is a bit of a nack in setting up these lockers, he is also able cryo treat the whole centre for you as well, it might also be the second hand crown wheel and pinion etc

shoot us a pm if you need his contact details


rob

jimbo jones wrote:well I went for a wheel at Appin today first time off road since I fitted the new/second hand crown and pinion and just my luck it up again same noise coming from front diff what is cousing this to happen? I cant aford to put new diff gears in every time I go off road.

Ive seen some setup with the GQ front centre, it gives the best of both worlds.

jimbo jones wrote:well I went for a wheel at Appin today first time off road since I fitted the new/second hand crown and pinion and just my luck it up again same noise coming from front diff what is cousing this to happen? I cant aford to put new diff gears in every time I go off road.

send this to your diff shop!
http://www.ringpinion.com/TipOfTheDay.aspx?TipID=11

I think they need to learn how to set up diffs!! or do it yourself, then at least you will know its done right....

I dont kow what to do with I spoke to toyota today $850 trade for a new pinion and crown marks is about $100 more

jimbo jones wrote:well I went for a wheel at Appin today first time off road since I fitted the new/second hand crown and pinion and just my luck it up again same noise coming from front diff what is cousing this to happen? I cant aford to put new diff gears in every time I go off road.

What were you doing?

If you are going to spend that much coin, buy 4.56 or 4.88 aftermarket ratios the 4.3 is a weak toothed ring. 4.56 run 37 instead of 43 on thesame diameter. You could also go 4.11 aftermarket up front and hdj78/9/100 rear gears

dow50r wrote:If you are going to spend that much coin, buy 4.56 or 4.88 aftermarket ratios the 4.3 is a weak toothed ring. 4.56 run 37 instead of 43 on thesame diameter.

With a pinion with more teeth which are smaller than the 4.3 pinion...so its sort of tit-for-tat.

4.88 ratio have even smaller teeth again. But you can get some cryo treated jobbies from the States - Randy's Ring and Pinion for one - and they wold hold up to more abuse.

The best option for peace of mind and cost effectiveness over the long run is to graft a H233 front diff into your 100 series housing. Still high pinion but an inch bigger.

Who wouldn't want an extra inch.

I say go for Randys R&P. Think of how much stronger quality axle shafts are compared to weak ones, so why not R&P's?

Also, try playing with your mesh pattern. More Root and Toe mesh. (And no, I don't actually know anything about diff setups...)

lukethedork wrote:I say go for Randys R&P. Think of how much stronger quality axle shafts are compared to weak ones, so why not R&P's?

Also, try playing with your mesh pattern. More Root and Toe mesh. (And no, I don't actually know anything about diff setups...)

also more preload on the case might help too.

really need a diff specialist who knows these diffs, im sure there are simple little things they do that may ciompromise longevity of the gearset, but bolster the strength that little bit.

bj on roids wrote:

jimbo jones wrote:well I went for a wheel at Appin today first time off road since I fitted the new/second hand crown and pinion and just my luck it up again same noise coming from front diff what is cousing this to happen? I cant aford to put new diff gears in every time I go off road.

Ive seen some setup with the GQ front centre, it gives the best of both worlds.

Same centre as GU..

But yeah, the custom housing is spendy.

Try one more proper setup...