are there wellknown any driveshaftproblems (the shaft between flywheel and crank) at the 355 ? I built two 355 engines with about 100 hp and about 100 Nm more power. At first view everybody may think, that then is naturally, that some components can break. But the strange story is, that in both cars this driveshaft broke already when the engines ran first time with only very little power. The next theory could be, that there is a vribrationproblem, because we use extreme lightweight flywheels without damper. But this system ran before for years without problems. So i am interestet, whether there are more people with similar problems. Many greatings from europe
Heres one that happened to Terry. Its about the best thread on the subject i have seen, http://ferrarichat.com/forum/showthread.php?t=150412
these are the numbers on the gearbox: in the casting: 2154699 then stamped 160078 year 95 then stamped 3402 do you really think the problem is the gearbox?
I'm confused with the numbers you've posted.......I'm thinking it should be 168372 followed by another number(this is the SN#). These numbers are on the bottom on passenger side just behind engine mount end. I'm only aware of 2 complete gear box assemblies for the manual shift(non-F1)...168372 and 174037 I have 2 gearboxes #138 and #2212..complete assembly # for both are 168372. Paul Hill tested Terry's 355 failed propellar shaft and indicated that the mfg process was not treated properly thereby producing a Rockwell hardness unacceptable for this use..
i controlled the numbers once more - they are right. Car is a 355 challenge, year 1995. so finally i produced now i special one and we will see how it works - i only wonder so much because they broke with so small power and revs. thanks for your help.
My #138 is a factory built CH gearbox instead of a dealer conversion from the CH kit....no big deal as the only difference to my knowledge is a couple of the shift forks,clutch, and clutch housing end bearing. My first impression when Terry's propeller shaft failed was that the mfg process was flawed, which later testing by Paul Hill confirmed. I highly doubt Ferrari controlled batch numbers on many of their parts and so if a mfg flaw came to light at the dealers Ferrari had no way of which cars to recall.....and more than likely Ferrari didn't care and would probably only replace on a case by case basis depending on the threat level from the customer...even when u threated to nuke them it was still sometimes ignored. The oem propeller shaft if properly mfg'd appears to be sufficient with no problems but others with more experience(Brian C., Dave H ,Jim Ace) can correct as I have only been into 2 of the 355 gearboxes.
