355 F1 Gear box problem ?

My 98 355 F1 Spider went through a 18 k + cambelt change service recently.
It was discovered during the service that a wrong type of oil was used before on the gearbox , most likely the same oil as on the electrically-driven gear box(since it was red) which is Shell Donax TX. The Gear oil was then changed to the correct type: Shell Transaxle oil SAE-75W90. There was not any problem with the above prior to this service. Gearshift was then OK

When I arrived to pick up the car, it was discovered that it was very hard to get it into revers, need to do several attempt, and I decide to not drive home at that time ( 12 hrs drive from the workshop). The workshop belived that it was something wrong with the clutch, and changed out the pressure plate and the clutch position sensor, the clutch plate was not in spare and was not changed. I change the clutch for approx 3000 miles ago, and it does not "slip" . Unfortunatly this repar dident help, I decide to drive home because of holiday the day after etc.

During the journey home I noticed that the gearshift display flash some times, especially at 3rd or 4th gear during low revs.

I also noticed last time I was home (working abroad) that when I should try to put in to 2nd gear from standstill, that the car went to neutral. It seems for me that the problem is mainly from standstill or during "automatic" downshifting at low revs

I have never had any gearbox alarm in the car, is there anybody "out there" which can have an idea what this is ?

Best Regards Jostein

 

Thanks for replay, I was afraid that this type of oil could destroy (worn out) the gear box, but hopefully not then.

Have received some feedback on an other Ferrari forum and the replay certainely "calm me down". Have to admit that the situation has caused a bit of extra stress for me.

http://******************/showthread.php?t=6281

Have a nice day

Best Regards Jostein

 

Seems like the link was not allowed to be enter, the replay I got was as follow:

"The gear oil change had nothing to do with your problems. The shop you use, are they up to speed on the F1 transmissions? Have you been using the same workshop for a while now? How did the wrong oil get into the transmission in the first place?

The reason I ask all these questions is that for someone equipped (SD1 or 2) and knowledgeable to work on that car the diagnosis and resolution is not hard and you sound as if there has been some history of trouble. It sounds to me as though what you really need is a new workshop.

Tell them to perform a cycle check on the car and that will tell them what is wrong. If they look at you with a quizzical look, put the car on a tow truck and find someone competent to fix it."

The mechanic which was working with the car was not familiar with the F1 gearbox or SD1 -2, he dident managed to get it through a full cycle. However it should be mentioned that this problem was not a part of the original service, it was discoverd shorthly before I arrive back to pick-up the car. The expert on SD1 - 2 was not available that day

/Jostein

 

Hi Dave and thanks for input

I will check this when I come home ( working abroad on a fix rota). I do not know anything about the wiring, it has certainely not been done by me, since I unfortunatly not have that type of knowledge

Regards Jostein

 

Dave, The engine has been out in connection with cam belt change, could it be possible that the wiring could be affected then? As I mentioned before, the gear shift was OK prior to this service.

Best Regards Jostein

 

Thanks David, certainely worth trying instead of drive in total 1100 miles (to/from) to the nearest workshop. Do you know what those relays "working task" are ?

Best Regards Jostein