http://www.ferrarichat.com/forum/canada/442296-transfercase-my-90-testarossa.html
Do we invent the wheel once again ? Why panic ? And WHY do they NOT read all about it here Romano ???
don´t ask me Mel because I don´t know. but may be they cannot read what I doubt, or they think it will never happen to them or they not reading in the boxer/tr/m thread
Guys--it's a brand new member (new owner?) that posted in a different section. Not everyone is familiar with F-Chat right away, and the search engine isn't terribly friendly either. I hate multiple differential threads probably more than anyone else but lets give him a break. How would you like your twelfth post to be about your "new" TR's broken diff?
I am so sorry to hear of your diff failure. I cringe to think about it. These guys here will help you through it all. I have yet to join the club and am doing what I can to stay out of it (by not driving the TR), I do have have a one piece Newman carrier on the shelf ready to install when the 30k service is done. According to a few on this site this event is an "unsubstantiated rarity". I wonder how many more it takes before that attitude changes?
Spasso it's not my car. I posted it here from the Canadian thread. It's an owner from Montréal. My Newman diff is here and I ordered new crown bolts, seals and orings today. I'll have to order shims from Philwozza and find side bearings locally. In a couple weeks I will be doing it and will post progress here. In no way I will wait that it happen to me.
If you consider time as a factor, then rate of failures should eventually plateau at one point for instance, 1 known failure/year. Here's what i would like to know: How many actual reported failures? How many miles on vehicle at failure? At what year did they fail? (seasonal temperature cycling) What was the driving style the diff was subjected to? (Idling=1, Tracking=10) From this, we can get a better idea on whether this is: an inevitable failure mode ready to happen at any time and without warning, or a failure dependent on age of vehicle, or a failure dependent on miles, or a failure dependent on storage conditions, or a failure dependent on driving style. If anyone is willing to keep a log of this, we'll have more of a scientific reasoning rather than fear of the unknown or just accepting that it will eventually happen to everyone.
I have done 7 or 8. Newman has done quite a few, I belive rifledriver has done quite a few. All on cars with either perfect service history, low miles or high, cared for or not. IT WILL HAPPEN. It's better to have a list with cars that have had the replacement, then trying to track down the ones that have yet to recive one.
So...25 - 30 cars 55 total cars around the world ? Is that changing on only Testarossa's , or does that include 512trs, and boxers ? Have you , Newman and rifledriver done them on all exploded cars , or is that including good cars before it happened ?
One aspect not considered is how many have NOT been reported. Do you really believe that every failure has been reported to Fchat? Or reported at all? Highly doubtful. I'll side with expert mechanics that have a full understanding of the design flaws of the carrier and the implications that it's not a matter of IF, but WHEN. No whistling past the graveyard for me, thanks.
But after all the reports here .... Bubba still questions the Obvious failures of the oem diffs ... Do we really want to convince him ? .... (quote "we have 12,000 cars" ... Not really: ... 7700 Testa's, 2200 512TR's and 500 M's and lots of them are now scrap) IMO it is not IF ... but it is WHEN ....
Well guys keep faith, at least Bigred is now going to have it checked. It's a beginning. He may someday believe it's a REAL problem.
Hmmm... The sweet smell of a diff thread....... I missed it, it had been too long! At least 3 or 4 weeks!
I've had a 50 yr old aunt and a 54 yr old uncle die of cancer, does that mean everyone in my family including me should start chemo now?
All I want to say is thank you guys for another diff thread filled with new and interesting information On the bright side...It must be spring if we are driving our cars! Hoorah for Spring and Hoorah for Diff threads that keep this forum from getting monotonous.
I have been working on Testarossa's in the biggest market area in the world since they started building them including 2 of the largest dealers in the world. I have never had a car with a broken diff in the shop. Every car I have direct knowledge of that did have a broken diff was tortured as many of them were in their early days in the hands of flippers. One of the local cars has 250,000 miles on it. Let me know when to expect his to break so I can tell him. Don't use me to prop up your Alice in Wonderland stats.
Brian, Thank you for chiming in as I thought I remembered you saying the failure rate was actually very low or something similar to that. If you torture a car, you can break whatever part you want to break. NO question, cast was not the smartest idea for Ferrari, for this part. But then doing donuts in a heavy rear engine Italian car isn't either. Could it also be, some drive the car even when they know they have a problem and wish it alway? Like noises from the rear, driving it until a catastrophe happens? Wonder how many are self inflicted?