Costa Tsimiklis wrote on Monday, September 13, 2010 - 10:55 am:Phil, the factory diff is an absolute faulty design and it is not fine in any way shape or form. The carrier thickness should have been at least 50% more and there should have been 4 pinion gears to distribute the torque evenly to each shaft gear. I've broken two and both had the same problem - elongated carrier holes from the pinion pins. One has 250rwkw and the other was a stock setup.
With a soarer weighing in at 1600kg + having 186-206 kw, a 2 pinion diff is a real oversight and is not acceptable. VL Turbos and Holden V8s had a borg warner diff which had a stronger 4 pinion setup, and their peak power from factory was 155kw for the turbo and a bit less for the v8, and the car was around 1450 kg. Toyota really went cheap on the rear diff for whatever reason, perhaps it was a oversight or just a cost cutting exercise. Regardless, the 2 pinion diff is dangerous when you are looking at putting through 50-100% more power and if you are thinking of doing any track work