360 F1 Neutral issues- help!

I picked up my 360 F1 today after purchasing it in Feb and having a major service and head rebuild completed by an independent. (Story for another day!)
While driving it home I experienced the F1 trans slipping onto N while driving. I pulled the paddles and pressed the auto button a few times and it went back to the original gear (3/4) and carried on as normal.
That was until it went into N and wouldn’t go back into gear. Right in the middle of a busy road. I called for a tow truck and kept trying it every 10 mins, until finally it worked and I went on my way. I was stranded a good hour.
I’m waiting on my thinkdiag scanner tool but hoping I can get some advice on what this intermittent issue could be.
Any tests I should be doing?
Thanks

 

2000

 

The c

Oh, that’s annoying- What other OBD2 unit works with a 2000? Any recommendations?

 

Thanks all for the suggestions. Flash32- I’ve ordered the unit and will send you my contact.

I walked the issue through with a Ferrari tech locally to me and he suggested it might be the relays overheating. I was in a lot of stop start traffic on a warm day yesterday. The fact it cooled down and worked fine, together with the heavy traffic (it was crazy for 45 mins).
What are the thoughts on this? Anyway to test?
I had no check engine lights on when it wouldn’t change from N.

 

An update:
I have been working extensively with Flash32 on this issue. We talk on a regular basis over the phone as we continue to diagnose and fix the issue (s). More on Flash32 below.
First, I sourced a flashed TCU from Eric355, plus the Thinkdiag2 unit. This enabled us to work deeper in the system and access data.
Flash32 identified immediate issues with the accumulator, clutch solenoid and the need for a new relay.... plus a bleed of the clutch and actuator. This provided a strong foundation for continuing to identify weaknesses in the system. The system was over working and not holding pressure.
The next issue was that I was experiencing P1741 and P1742 errors when the trans and engine were warm (over 30 mins). At which point 3rd gear would still go into N on the downshift and then the trans would be stuck in N. We replaced the potentiometer sensors and went through the necessary recalibration procedures. Flash32 had me check all wiring, at which point I did find an issue near the connector where there was a cut in the insulation. This was repaired. The lower sensor did have Trans oil inside which indicated a leak or a result of weeping actuator seals as the car had been sat around for a while. Replacing the sensors and rechecked the senor after a couple of days and there was no oil. Again, ticking off the list of issues.
Flash32 helped me identify it wasn't the trans forks sticking, but the actuator button not able to complete the motion. He looked up the F1 actuator solenoids linked to particular gear changes and recommended I switched over two solenoids to see if we could influence the 3rd downshift gear issue. A full system bleed followed.
This fixed the issue. I have now driven the car for 45 mins on two consecutive days and not had any issues on the 3rd downshift and not had the error codes return. I will continue to drive the car in the current state for the next 2 weeks to make sure I have a solid foundation. Then, I will work with Flash32 on the PIS. Car drives well, but want to make sure it is dialed in.

Now for feedback on Flash32....... I have had the absolute pleasure to get to know him. Not only is he incredibly knowledgeable, but patient and very methodical to diagnose issues. He has helped me increase my own personal knowledge in this car and help me enjoy my hobby in working and driving my car. His ask was for me to pass it forward, which I did this morning. Donating to a Children' Cancer Charity. Helping children and families in their journey to fight cancer.

Thanks Ferrarichat, Thanks Flash32!

I'll continue to share updates on this topic as things progress.

 

@Rjvb3 the best advice I can give you is to connect with Flash32. The knowledge and experience he shared with me was so valuable, he diagnosed the issues I had and even shared links for the parts from unaffiliated sites to either save money or avoid parts (brands) which he had experienced issues with and walked me through the procedures to fit the parts and finally run the tests to check the issues were resolved. I literally would be still chasing my tail and spending unnecessary crazy money.
If you're wondering who this guy is- read the thread on him: (quick search)
Flash32 contributions | Page 5 | FerrariChat

I believe his first consultation is free. (you have nothing to lose) and then he's asking for a charity donation for additional time.

You'll come away with a working car and feeling good at the same time. ...... at least I did!!

Good luck with the fix.

ps- yes I did use the Thinkdiag2 for the bleed, but there were other steps and mapping we also did to verify the gear engagement and positioning was correct.