LSD Group order ?

I think AD have found a more time efficient way of fitting their LSD's, as mine cost me approx £1770 including VAT. They also put the additive in yesterday, so there is now hardly any noise.
Simon

With the new 147/GT Q2 out, and more models advertised to have this option, could we retro fit one of those original Q2 units to our GTA's?

AFAIK, the 147/GT JTD 16v uses more or less the same 6 speed gearbox, and thereby perhaps differential as the GTA's ?

pity but not the same gear box on Q2 as 156/147 GTA brera & GT

if any one needs lsd's mail me as a company i trade with will have some in about 10/11 weeks,a few mates of mine have ordered 4 or 5 from they have 15 on order

yes a pity the Q2 not fit but then the price may be more than £600.00 plus Vat

and warranty?



Can someone confirm what wb is saying?-....surprised that they would have changed the entire gearbox for a lsd of the torsen type.

The Q2 dif does look remarkably like a Quaife and probably is. But that doesn't mean that Quaife will sell you one (I'm assuming they are different to the GTA difs).
A while ago I checked on ePER and I'm sure the 1.9JTD difs were different to the GTA. That doesn't mean it is incompatible though...

just a point the Q2 diff is not Quaife diff,

and as for diffs for road use i have ordered a quaife one

having used gripper and others in the past for racings in FWD cars possibly the Quaife is the best option for road use due to the way it works (not plate diff)

BTW just spoken to my supplier for the diffs they only have 7 left of the 15 batch the have on order

So your supplier has a batch of 15 on order from quaiffe?

Or out of a batch of 15 quaiffe will be making in the new year, only 7 are left?

yes they have 7 ,
4 alfa owners i know and myself plus others that have ordered and paid deposits

Originally Posted by wide-boy

yes they have 7 ,
4 alfa owners i know and myself plus others that have ordered and paid deposits

How does the purchase work? Earlier i gave up the idea of group purchase because i did not want to void the waranty...Quaife would only deal with one buyer, which means the seller (group buyer co-ordinator) would be responsible for first point of any warranty claim.

Of course the Group co-ordinator would have to ask the group buyers to agree to a vaiver of resposibillity, effectively leaving people out to dry if the LSD brakes down or ruins the car.

This way, Quaiffe is basically totally free of any responsibillity..

Not worth it IMO.

thats why i'm buying from a company that will fit the diff as well,

they will supply only if required

but as a group buy warranty is a problem it's not like buying from a company or owners club

I tried to organise one a few weeks back but I had a flurry of e-mails saying I was treading on toes or they have one in progress etc so I gave up on it.

I can arrange a buy through demon tweeks (they will take the cash, not me) for £627 + vat.

I paid 1500 Euro (about £920 inc. vat) for the quaife LSD via Madeno Racing in Holland. Mind you in that (high) price, i did have a genuine place to complain had something gone wrong with the unit. So £746 from a big company like Demon Tweeks sounds like a good offer.

iam paying £1050 fitted

A good friend of mine works there. They (Tweeks) are making very little money on that offer, the only reason I am able to offer it here (no min order) is in order up the numbers of orders going into quaiffe to encourage them to tool up - My friend understands that the diff is the only thing holding up my build, which will be a daily driver. I'm currently running about in a spare sillyspeed that should be up for sale.

Oh I'm paying 738 fitted lol.

738 fitted ~?

so fitting labour free?

may be worth the drive if thats so

I'm fitting it myself.......

I know some folks here have ordered Quaife diffs for their GTAs, so I thought I'd mention a potential problem with them. You may have noticed that Quaife only list the QDH6E diff for the 2.5 V6 model. Having said that, it appears many in the UK and elsewhere have had them installed in GTAs without apparent fuss.

A couple of months after I had the Quaife diff installed I noticed a small leak coming from where the shaft meets the diff casing. The mechanic renewed the seal and gave it the all clear.
Last week I checked again and noticed a leak coming from the other side of the diff.
On friday, the mechanic removed the shaft and examined the diff/shaft coupling on the bench. His conclusion is that the Quaife diff isn't locking onto the shaft properly (something to do with a spring clip I think), resulting in ~5mm movement. With this movement the diff is stripping the seal, hence causing the leaks. With the old diff to hand, he was able to compare the two on the bench; the old diff does lock firmly into place, with only ~1/2 mm of play.

I haven't seen this demonstrated (hopefully tomorrow), so apologies if the explanation is vague. I'm assuming nothing was maladjusted/damaged during the original installation.
The mechanic will be speaking with an engineer from Quaife tomorrow about the issue, though he can't see a solution himself. I have a sinking feeling the old diff will have to go back into the car.
I'll update when I know more.

You get some spacers so you can make the diff fit correctly.

Originally Posted by sandys

You get some spacers so you can make the diff fit correctly.

Sounds like a simple solution. Is this known to be necessary?
I got the impression from earlier in this thread that the diff slots in without any fiddling or fettling.

About Q2 I can speak about because I asked recently to some Alfa Romeo eng. had worked on it (I'm willing to fit a LSD to the new 3.5 V6 that will be ready for my GTA next month).

Q2 mount a Torsen LSD,
Basically the gearbox of MJTD and GTA is the same so the Torsen can be mounted on GTA too. I don't know if it need some small works on to fit.

The first answer I received about the LSD fitting it was "Do not do such MOD"!
They said me the understeer will become heavily invasive.
On Q2 there was many changes to adjust the stability and good drive of the car.
I learn on my GTA would be need to chenge many parameters trying to improve the situation, but every thing would be a test that require time, money and give no any warranty about the result.

Actually I'm still not sure about but I think I'll try to do some changes together with LSD to try the right setup.

Of course everyone confirmed me it would be better to use a clutch type differential than the Torsen, I'll collect more infos about availables clutch type LSD.

OOPPSS...double post....sorry

Hi Guys I sell the plate type LSD same supplier as AD for £695 plus vat for GTA'S and JTD'S all v6 cars they have the best grip but will need some adjustment at some point as the plates wear. I've raced FWD cars for 15 years now and messed about with a diff or two. The plate type lsd we can set up in many ways fast road and race to work under drive & under braking ie to stop the inside wheel from locking when braking hard into a bend more grip less grip.
We don't just buy it re-box and sell on,they are best for fast road & track days.
For fast road TB is the way to go as for 2.5 and 3.2 don't worry it's
the same gearbox casing for all v6s and jtds,std diff casings are the
same for all v6 and jtds. For race cars with slicks peaple use the 2.5 gearbox for the lower f drive the diffs is not a problem with 300 bhp
plus and solid clutchs
Quaife 2.5 Fine for GTA
As for fitment all diffs need setup for the bearing end float as the casings vary in width. Shim kits from alfa are needed about £20 or if
new casing is wider mod casing to same width as old unit and fit.
The new Alfa Q2 TB lsd also fits but on back order at the moment
they cost £220 plus vat great value
hope this helps
http://ahmotorsports.co.uk

Cheers Adie : Very helpful post.

BTW use do you know how long your clutch type diffs go before needing adjustment for road use, and with occasional track day use?
Would this just be the replacement of a clutch plate, and how much labour would be involved for a GTA gearbox?

Do you have any pics of your 33 race car?

Cheers,
TB