waiting for a
Join Date: Jan 2007
Location: Buckingham, UK
Re: 3.2 V6 Blown Diffs
Fraser, your pm box is full, but to answer your pm to me on why I think diffs are failing:
I believe the problem is two fold. Firstly, the diff is boarderline for the application from a strength perspective. This weakness is compounded by the ASR traction control. In the event of only one wheel spinning the ASR applies the brake on that wheel (in a staccato ABS fashion) This feeds additional loads through the diff, which take it beyond it's limits, and can lead to instantaneous failure, or cracks which will cause failure further down the road. It has also been suggested that the quality of the standard lubricant may be too low, or that the level tends to drop over time, leaving the g'box/diff short of oil.
The end result is that the diff will blow, normally taking the gearbox casing or bell housing with it. That often leads to oil on the clutch plates, necessitating it's replacement. Obviously very expensive!
While my car was covered for repair under warranty, I'm convinced that as nothing has been changed, it's only a matter of time before a similar failure. And I was considerably inconvenienced without my car, and had to hire a car from my own pocket, yet Alfa UK and Alfa Italy were not at all accomodating on the matter. I'm pesamistic that as most of the cars are soon to be out of warranty that Alfa won't care to address this shortcoming. This was certainly the case in Australia recently where a friend with the dealer network there has told me that Alfa trialled diffs from Quaife and Autodelta to assess a replacement program. I agree that this isn't what you expect from an expensive performance car. I certainly didn't. If you have a plan for approaching Alfa for a proper solution I'd love to hear it.
Six/twelve devils screaming
Alfa History: '78 GTV 2.0, '83 GTV6 2.5, '98 156 Selespeed 2.0, '96 GTV 2.0, '96 GTV 2.0, '05 GT 3.2 V6, '96 146 2.0ti, '99 156 2.4JTD, '01 147 1.6 Lusso.
Current Others: TVR T350 Spider, AM V12 Vantage