Good Luck Brad. As ever: please have photos taken (for us)of the many steps in the process of replacing the upgraded diff. Your diffs will all follow .... it's not a matter of IF but it's a matter of WHEN .... they will all go. Be in time ... avoid massive costs.
In great original condition... came out of my 87 at 45k. Replaced it with a billit diff from Newman.. Preventive Me
for using this diff as an ashtray too expensive for me then I better use my broken diff - even I´m non smoker
Hi, I have just bought a Testarossa and asked the garage about diffs. They said they have only ever seen three go and it is not a foregone conclusion. I was prepared to change the diff but they have said don't bother. I am unsure what to do. Why do you say they will all go? Just curious..
then go again to the garage and they may give you a warranty that the diff will not break. otherwise they may pay all the additional material and labor. it is only a question of "when will it break", not "if"
We should start a poll on the percentage of diffs breaking in these things LOL. From what I've heard it sounds like a total crap shoot. Many including myself think that it depends on how the car has been driven. Many were clutch dumped their lives. Hard to connect the dots though if you ask me. Sounds like Vegas.
may be you are right - but may be not but when the diff breaks then there is a lot of more to fix and that will get very expensive same as with the fusebox, but there the costs are much lower preventing and to be on the safe side I suggest - but everything to his own as newman also said: the diff may be broken without you feel it, but when you dismantle then you see it. when you are so far you are lucky - but mostly nobody sees ist and some day it will destroy much more things
Same with timing belts, but they get changed way more than necessary. I drive my cars, so when I bought my boxer there were 2 things I wanted to do immediately; replace all the suspension bushings and do the diff as a peace-of-mind preventative mait., the major was done the prior year by Ferrari. When I did the Newmann diff I also did a bunch of things which don't get done on a typical major and corrected those which they did poorly. I do drive it alot (7-8K in the last 3 years) so it was good money spent and 2 1/2 months of my time. It's all personal choice and if I were a waxer polisher type, I probably would not have bothered doing suspension or diff., then again I would never have bought a boxer.
I never heard that the diff in a boxer is broken but the example with the timing belts is perfect ! ! !
Great post! I so wish it doesnt happen to me. I try to do everything you said. Knock on wood! Sent from my iPhone using Tapatalk
IMHO, I think it happens because of improper stress relieving after welding. I do not believe it will happen to everyone.
Very possible. I also think it has something to do with the hand grinding/cleanup after weld......at least it appears that way. Very inconsistent and uncontrolled process. But, if the same diff was used on the Boxer and they rarely ever break, then it must also have something to do with the increased horsepower of the TR. Here's a Cause and Effect Analysis we started a while ago http://www.ferrarichat.com/forum/144747814-post179.html
This diff was made for handling 300 HPs Sam ... in the 365 and 512bbs Not 400 HPs or even 426 (512TR) ... That's why ...
The welds got lighter over time. Look at a 365 boxer one and it has such a fat bead they have to machine them down to clear the left side support. The BB512 got a lighter weld that had the high spots machined off, Testarossa ones have a smaller weld that needs no machining step! The down-side......kaboom!
That's what I did and had peace of mind everytime I drove the car. I still have my unbroken OEM and it does a great job on the shelf.
it depends if you let it do just when the engine is out for a major service or only change the diff with the engine in the car. when the engine is out I need between 3 and 6 hours, it depends how often I have to remove the diff for shimming and adjusting the bearings and also check the play between crown and pinion