Which Diff Centre For A Bf 6Spd Auto

[The Jizard]

Just a centre out of a BA XR6T 4Spd Auto, I smashed the carrier in my previous diff so I just went this way, if your changing because you want to not because you have too I would build a centre with a true trac and stronger Mal Wood diff hat. I should of done this but was and still am having a love/hate relationship with my car.

On good tyres the car launches hard, and pulls hard in 6th gear from a roll on at around 100kmh or so.

[XF Falcon]

Spoke to a few friends about Truetrac diff centres, seems like there's two types? Normal Truetracs and LSD Truetracs?

1) The first acts like and open centre diff till it gets enough load through it then it locks up and both wheels spin. A friend of a friend had one of these in his VK and apparently when he turned left and gave it a bit of stick on a corner it would light up the inside left wheel only, but when he turned right both wheels spun. This sounds pretty crap and its not what I'm after if this is true?

2) The other Truetrac ones are labelled as an LSD Truetrac, and it acts like an LSD diff under lower loads and keeps both the wheels spinning under load. So basically it spins both wheels all the time, which is what I'm after.

If that's the case do you specifically have to ask for an LSD Truetrac when chasing up quotes..etc? (I think I already know the answer, and its probably stupid to ask, but I wanna be 100% sure)

Edited 17/10/12 01:37 PM by XF Falcon

[XF Falcon]

I'm assuming they are identical, but are the diff centres in a BA XR8 and a BA XR6 Turbo the exact same units? And both are 3.45 if they are off a 4spd auto car?

If so I might chase up a diff from the wreckers and get that fitted, or price up a new one from Fraud. Not really looking at spending $3000+ on a truetrac and stuff at the moment when all I'm after is a ratio change, and my stock diff is holding up brilliantly with my current power level so I'll stick with a standard one for now I think.

Edited 04/11/12 02:17 PM by XF Falcon

[djqc]

A truetrac is a truetrac as far as I'm aware. They are on special at around $1200 at the moment. There was no mention of different types when I ordered mine just last week. It's an expensive exercise once you allow $500~ for the gear set, and new bearings if needed. The real cost is in labour though, so don't skimp too much as the cradle might be out again in the near future if luck isn't on your side.

[qik1]

As a nice daily lsd that's still strong enough to cop any hiding call mal wood & ask him about the diff that was in spiros & now in John' JET066. We've stuck with std diff gears for general daily use & to give use legs in the topend of the track. The gearing that is pretty common is 3.23's otherwise, they seem to give a good balance all round without being too revvy on the highway.

Only problem is supply on them, we wanted them for our th400 conversion but still having trouble finding a set

[djqc]

  On 05/11/2012 at 3:18 AM, qik1 said:

As a nice daily lsd that's still strong enough to cop any hiding call mal wood & ask him about the diff that was in spiros & now in John' JET066. We've stuck with std diff gears for general daily use & to give use legs in the topend of the track. The gearing that is pretty common is 3.23's otherwise, they seem to give a good balance all round without being too revvy on the highway.

Only problem is supply on them, we wanted them for our th400 conversion but still having trouble finding a set

Really? My diff is getting done on Wednesday and the guy said that there are 3.23s in stock and he can get them. I might give him a ring and make sure he can in fact get them

[qik1]

If that's the case can I please have his contact details so I can get a set

[knoles]

The 3 valve v8s had 3.23 std I think

[djqc]

  On 05/11/2012 at 6:26 AM, qik1 said:

If that's the case can I please have his contact details so I can get a set

wa diff centre