When you have the car out of gear in neutral and the clutch not pressed in the rattling noise is the clutch. Sound is usually louder with aftermarket clutches too.
When you press in the clutch the sound is supposed to go away due to the clutch, flywheel and transmission gears are all open and spinning at different speeds.
If you press in the clutch and the sound goes away the clutch and pressure plate may need to be changed. If it is still on OEM and you haven't changed it and do not know the previous history of the clutch with the vehicle, I would think a new clutch and pressure plate would fix it.
I would say see if changing the transmission and clutch fluid works, but if it doesn't and you need to look at getting the clutch and pressure plate, (usually is a good idea to get the flywheel as well), you will have to pay for both fluids a second time and for the labor again as well. As for the type of clutch and transmission fluid, Motul is always a good brand to go with
I bought my Z a bit like yours. I bought mine with 88,400 on the odm and "had to" (clutch was weak and wanted to lol) replace the clutch/pressure plate/flywheel about 10k miles later. Went with ACT for those three and in the same process I went ahead and did the Z1 motorsports CSC elim kit and that itself makes the transmission and clutch feel sturdier and more reliable.
I've had my new clutch setup for about 2 and a half months or so and still love it.
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Originally Posted by Cw370TT
Sorry, I don't know how to make the video appear in the forum.
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Just copy and paste the link into your post. Don't need to embed the video in the post. Just a link to where people and click and view