Diff!

[Niggadore]

My diff has been making a metal on metal rubbing/whineing sound for a while now, and yesterday started knocking.
(my guess would be carrier bearings?)

And then today, i gave it a punch from the lights, and as soon as second snapped, BANG followed by alot more banging ald clunking until i got home. I pulled up to lights at the seaford road off ramp, and came to a complete stop. then once i tried to take off, nothing, just revving. so i chucked it in reverse and then threw it into first as i was rolling and i guess it caught the gears and i was moving again

Like i said, my guess is the carrier bearings.. would i be correct?

[HARVZ-6]

id say all the gears are probably destroyed now aswell

[Niggadore]

id say all the gears are probably destroyed now aswell

My thoughts exactly. i weighed up the cost wether to drive it home or get it towed. probably chose the wrong one.
The stato has a very harsh shiftkit in it, which has been in the car for about 40,000K's and the car has done 371,000, first to second snap nearly gives you whiplash so i think it was time for the diff to give way (with all the burnouts the old owner did not a great help)

Basicly, what would i be looking for in a diff that would last, with better acceleration on apprentice wages? or would it be better to go a standard diff, and get the pressure in the auto turned down a little?

[alexlove]

that happened when i crashed my car doesnt sound good

[freddie142]

If your cars only putting out stock power would the diff really be taking that much stress????

And if it is the gears that are taking a beating why don't you just get them harden??

[BrAdAsS]

the diffs are weak.. im on my 4th with a more or less stock engine. at $750 for a full rebuild/install
If it's the planetaries in the diff then a spool will stop that from happening but will cause other shit like breaking the cv's once a year lol

[freddie142]

does spooling/welding the diff damage/ put undue stress on the irs?

[BrAdAsS]

It puts more stress on just about everything.

[Niggadore]

Well, it's stock as a rock apart from the apparent $2400 spent on the auto.
I think i'm going to get the pressure turned down a little.
I don't know why anyone would spend that amount on building a tough auto and not upgrade the diff or the tail shaft.

If i put a 4.11 in with a spool, what sort of revvs would i be getting at 100 k's an hour?

[levymetal]

4.11s? there are some calculations somewhere - ****ed if i can find them though! my guess is around 2400-2500rpm at 100km/h

[greenfoam]

4.11 are uselss in a street car with a an engine that makes power as low as the 304 does. 3.9's are the MAX. I don't know how you managed to break a diff in a VQ with a stock motor but I would put it down to bad luck / or no oil or something. The diffs are alot stronger than that so I wouldn't worry about it happening again no matter how hard you make it shift, the IRS cradle will break ages before anything else does

[Niggadore]

Ah i see. How come? What exactly would i experiance with 4.11's? i'm after quicker take off, so i guess i should take your advice and go 3.9's

I pulled the diff out today and had a look inside, and the crown's chipped. not too bad, but bad enough, so it's new diff time

Cheers.

[vn_v6]

a spool kills drivability, harder to do u-turns, use set of tyres a month for the rear lol, alot of axle bind and low speed, but yeah good fun when its wet

[Morton]

harder to do u-turns

I beg to differ

[rob drag racer]

a spool kills drivability, harder to do u-turns, use set of tyres a month for the rear lol, alot of axle bind and low speed, but yeah good fun when its wet

oh god here we go again i hope stealthy don't see this lol

[centy]

stealthy has been proved wrong but won't admit it.
assuming it is a lsd, i have been seeing a lot of them were the pinion bearing have let go.
This is probably what has happened to yours.
Likley causes are
1 old age
2 oil has failed due to extra requirement of being lsd
3 lsd puts more pressure on pinion when it locks causing faster wear.

either way if it is live axle just get a secondhand one and jamin and maybe swap the lsd centre over.
Takes a bit of skill to get the shims right. make sure you use the gear set from the replacement diff.
irs, same deal.

I have been paying $40 for std diffs at the dump up here.

[rob drag racer]

stealthy has been proved wrong but won't admit it.
assuming it is a lsd, i have been seeing a lot of them were the pinion bearing have let go.
This is probably what has happened to yours.
Likley causes are
1 old age
2 oil has failed due to extra requirement of being lsd
3 lsd puts more pressure on pinion when it locks causing faster wear.

either way if it is live axle just get a secondhand one and jamin and maybe swap the lsd centre over.
Takes a bit of skill to get the shims right. make sure you use the gear set from the replacement diff.
irs, same deal.

I have been paying $40 for std diffs at the dump up here.

i must admit i picked up a vn running for 90$ so yeh either a center or a cheep diff aint to hard to find