I replaced throw out bearing throw out bearing flange, all seals of , like dozens of them flywheel clutch. engine rear main seal basically everything, except the pressure plate, because I think it is in good condition. My clutch was at around 70% life left anyways before the replacement so I think the pressure plate is fine. i replaced the with new flywheel, clutch for some other reason unrelated to slipping. now after everything, when I was downshifting from 3rd to 2nd gear and floor the gas, it slips really bad. There's no oil leak anywhere between the gearbox and engine. is it really the pressure plate?????
Could you see the pressure plate? It might be glazed. But here is an answer I couldn't resist, "It slips because of crappy software mapping from the factory." Hehe, just kidding. But on a 360 the CS TCU helps a ton. Grade and cold temp will also cause it to slip more but that is all normal. But I have also found that the clutch will still nanny you even with ASR off in Sport mode if you shift below 5k rpm from 1 -2 and 2-3. I think this is to avoid wheel spin even with ASR off. I have no other way to explain it since the clutch is fine and works great above 5k rpm in those gears. Higher gears even better. My PIS is set to 3.79mm. Check your settings too. If the PIS is out of whack it could effect it. Also, g loading from dang potholes and other crap roads really flip out the computers.
you can say testing. for 10 years I thought replacing pressure plate each time replacing the clutch is a waste. so this time i want to have a test.
If you replaced the flywheel then the PP was also in need of replacement. I suspect your PIS is far out of adjustment.
I would have a Ferrari Mechanic with an SD2 check your PIS setting. As John above have mentioned, the 360 transmission software is not very good. Clutch slips badly during initial take off and really bad during reverse and uphill. It is also common for the clutch to slip when the transmission is not fully warmed up. I have an F1 F430 now and this is one thing I am very happy about the F430 compared to my 360 F1, the clutch slip on an F1 F430 is much much less compared to the F1 360. I hope you figure it out soon.
I was always under the impression that when the clutch is engaged, there is no hydraulic pressure on the release bearing. So the clutch would have all of the clamping force that the pressure plate can exert. Setting PIS would have no impact on a fully engaged clutch. Clutch clamping force is a function of diaphragm spring force and fulcrum points that multiply the spring's force through increased leverage. If the clutch disk is too thick or the distance between the flywheel and the pressure plate clamping surface are too close, the pressure plate may not be exerting it's designed clamping force. This would allow you to apply more input torque to the clutch than it can hold. It's just a thought.
If the Op's 360 is and early model, the PIS can't be adjusted. I had a similar problem with my 2001 360 F1 and until I upgraded to the CS TCU, we couldn't keep the clutch from slipping. Clutch, TO bearing, pressure plate and F1 actuator were all replaced. Once we had the CS TC?u installed all slipping went away and the shifting was better, especially the downshifts. Hope this helps.
