Thread: Quaife differential

No first hand experience but I believe they are based on the first generation Torsen.
The Quaiffe ATB diff is used OE in a lot of the Ford RS hot hatches in England, so it should be pretty benign in nature.

The downside of any torque-biasing diff is they need a modicum of friction on the wheel with the least traction to bias, so if you lift a wheel that side will spin and you lose drive to the grounded wheel.
Some left foot brake to bias the diff when lifting a wheel.

The Quaife-syle diff that gets a lot of mention here is the TrueTrac. They are available in Australia from Locked Drive Systems.

Recommended for the front diff instead of a full locker, as much kinder to the steering response.

Not sure of the exact cost, but I gather around $600 or $700ish, but someone who has bought one will surely correct me if I am miles out.

I had the Quaife Torque Biased Diffs in the front and rear of my 130 and didn't notice any ill effects on the road.
They were installed when I bought the vehicle though so I couldn't give you a 'before and after' report.

S.

I have tru tracs (similar to quaife) front and rear in my disco.

Tyre pressures need to be reasonably close or they tend to pull to the side with low pressure.

Otherwise no problems/issues with steering/handling associated with tru trac.

I have 3" lift, and no castor correction - it could be that the tru trac in the front helps to stop wandering.

I think in real terms, the biggest difference between the TT and the Quaife is the biasing ratio which IIRC was 1:3 in the TT and 1:4 in the Quaife, so the quaife I thought was a more positive drive. Aside from that they do the same thing

I had one in a RRC and found that there was a slight resistance to initial turning . EG going into a curve you would slightly turn the wheel, and nothing nothing then turn. Also as stated botrh tyres had to be the same diameter and/or pressure or it would pull to the smaller tyre.

Otherwise no ill effects. I removed mine as it was badly set up/noisy and had a pinion bearing leak. I might yet replace it if I can be stuffed to have it rebuilt and fit the damn heavy thing.
Regards Philip A

Hi as stated the Quaife and True Trac work on the same principle,(totally different from the Torsen) the Quaife is better engineered, has six sets of cross gears, the True Trac has only 3, the quaife is made from better materials and will last longer. As for performance the two are very similar with Quaife having the edge but the Quaife will do it for longer. Down side is the Quaife costs a little more.
Regards Ian Ashcroft

But in a dollar per performance comparison, are these diff Worth the money over a air locker or such ?