Hi, my 612 has run like clockwork for last 8 years but now I am seeing following issue. Once the gearbox is warm (after 30-40 minutes of driving) it will not go from 3rd to 4th and instead selects Neutral. This only happens on a gentle throttle / at lower revs. Under harder acceleration there are no issues. There are no issues with the clutch / gearbox in general, the car pulls away smoothly, changes gear normally and it doesn't slip under hard acceleration. There are no similar issues between any other gear including going from 5th to 4th. Normal or F1S setting makes no difference to the problem. After reviewing past posts on here I took the car to my specialist and they did the following: - Changed gearbox oil - Changed F1 hydraulic fluid - Checked over the system for good pressure / leaks - Read estimated clutch wear, currently 66% remaining. - Recalibrated the PIS (twice) Still have the same problem. They do not know what the issue is. Car has 50k kms now, clutch was last replaced at 24 k kms. Clutch should be good, car is driven regularly, rarely in traffic, horrible hill starts are also rare. Any ideas? Remember this only happens during gentle shifts and part throttle and only (so far anyway) 3rd to 4th gear. Thanks for any input Jeremy
The items you should check / do in order Clutch wear do a relearn could be potentiometers Could be synchro in transmission
Obviously clutch wear was my first thought but there are no other issues. Clutch wear is estimated by the computer at 66% which after 26k kms from the last change sounds about right. The problem is to check the clutch visually you might as well replace it "whilst you are in there" and I would rather avoid a 10K bill if possible. Relearn? is this the process where you leave the car at warm idle with no auxiliary systems running for 10 to 15 mins? I wasn't convinced that actually does anything but I guess I can try. Hopefully it's not a synchro but surely that would be more of an issue when the oil is cold? For first 30-40 minutes there is no issues at all. Could it be the F1 relay? I know these tend to fail slowly putting more and more strain in the system. There is a company here in Switzerland that does a high quality replacement (Scud Ing?).
The relearn for the F1 TCU is a procedure that you start with a diag tool/ computer to remap the shifting grid Are you sure you set PIS correctly ? It must be set when transmission is hot - start to engage at 1000 - 1100 rpm Did you do some timings - pump cycles timings -- time from off to off with key on / engine off and then again off to to off engine running - also count exactly how many seconds it runs Also did you look for stored error codes
Change the clutch sensor. Had that same issue on my car and it went away with the clutch sensor replacement. Also changed the clutch and flywheel since transmission was dropped. Flywheel apparently are no longer manufactured by Ferrari, so get your hands on one now while they are still available
Proper diagnosis is critical here ...you can throw parts at it or do a proper diag If you mechanically inclined and have a diagnostic tool that will read your TCU I would be more than happy to help you on the phone I'm not sure if it thinkdiag2 would work Sent from my moto g power using Tapatalk
I tend to agree Flash32. A number of proposed solutions that fixed similar problems (thanks for the suggestions guys) but not necessarily the same cause. From my research parts are not cheap enough to throw at it and the labour cost is significant, especially where I live. My specialist said there was no faults registered on the computer to give a hint although I don't think they had an SD3 tool. I don't have a diagnostic tool myself, I could buy an OBD reader but not sure if that is enough? Looks like I need to go to the right official service partner to get advice. May end up being cheaper and easier in the end.
