Im not sure it's a straight swap. But hopefully it is. Or maybe we will see something with the MY2021. But even the, I prefer the handling of the G37 to the Q50. Even if it's a 2 minute commute. I feel like the Q50 took a step backwards, so the next iteration needs to be an improvement

 

I want a part replicated in carbon fiber, does anyone know a company that could do this for me? I've had it done in the past but with a company that I had parts they actively wanted. I have the part on hand too.

 

I've been having some weird clutch and/or transmission issues:

1. I had been driving for a few minutes and the clutch pedal became very stiff all of a sudden. It was especially stiff at the bottom half. I haven't experienced this again, but my clutch pedal does have more resistance since that day.
2. The clutch pedal starts to feel weird about half way pressed in. Words escape me, but lately it's had a popping or rusty spring feel to it.
3. In neutral, the car has a constant whirring sound. When I press the clutch pedal in about half-way, the whirring sound goes away.
4. When releasing the clutch pedal, at about half way the clutch bites very hard, makes almost a snapping/clicking sound.

I've seen throwout bearing, pilot bearing, input shaft bearing, clutch fork adjustment and breakage, and a few more. 1 and 2 have just started, and 3 and 4 have been there a while but are increasing in noise.

The clutch and transmission are all around just more noisy, finicky, and temperamental too. It has the SB Stg 2 and RJM with new master, slave, and CMAK installed October 2018. I understand this setup is more noisy than normal, but the change in behavior and noise concern me. Any help narrowing down what the issue(s) may be is much appreciated

 

My first guess is throw-out bearing but could be clutch forks or take-up springs, too.

 

I would check the RJM pedal for proper adjustment and free play.

 

If I'm parked next to another car, or the house or something, and the car is idling in neutral, I hear a rattle in my transmission that goes away when I press the clutch pedal. Been like that for years.

 

Thanks all. Hoping it's mostly clutch pedal related, but the increase in noise is what I get hung up on. I made a short video - the snapping sound is when I'm releasing the clutch pedal:

 

To me it sounds like something is getting hung up inside the transmission. Get under the car, remove the rubber cover and with a light try to see what is going on.
It almost sounds like the pressure plate diaphragm spring is getting hung up on the throwout bearing.

I hope I am wrong and it is some simple adjustment!

 

Yup, I'm with slartibart, those are all signs that point to a bad throw-out bearing, but it could also be binding in the clutch fork contact areas. If it's any of these things, it should be fairly obvious once you pull the tranny and inspect the clutch parts.

 

I don't mean to be a d*ick, but in spirit of accuracy, the G37 doesn't have a "clutch fork"... It has a CSC (concentric slave cylinder that fits around the transmission input shaft)
If the rubber cover (where the CSC hard lines run though) is removed, you can see the backside of the pressure plate/throwout bearing and should get a better idea if the transmission needs to be removed.

Update: I just saw that you have a CMAK, which does have a clutch fork... ummmm ignore the comment above

 

I thought the throwout bearing only makes noise when you press the clutch pedal in, but I hear so much back and forth about this. How does having the CMAK affect all of this? I'm wondering if I need some special throwout bearing if it does end up being the culprit.

 

Sorry, I missed that you had a CMAK, so you do have a clutch fork.

As for the throwout bearing noise:
• If the bearing is worn/bad it will make a noise when the clutch is pushed in. That is when it is being pushed into the diaphragm spring of the pressure plate with a lot of force. If the bearing is worn and has rough bearing races, it will make a noise.

If you hear a noise with the clutch out, that is just the normal spinning of the input shaft and gears inside the transmission and/or the dual mass flywheel with a little play between the two masses.

As I see it, you next step is to have a look and see what is going on.

 

That's where I landed last time I was researching this situation. For me, it's rarely noticeable, and has remained constant, and I think I'm not going to worry about it unless it changes. It's a modified, nine year old car, but I still hate hearing noises that resemble anything like a rattle.

I guess I don't have anything to add to Obsidean's problem. Mechanical noises are one thing, but a clutch pedal that feels anything other than normal is worrisome, whatever the cause. It messes with your confidence while driving.

 

Thank you, Sonic. At least I can rule out the throwout bearing. We'll see what comes up after further inspection.

I appreciate the input anyway, Rochester. I'm going to focus on the pedal related issues since they're new and noticeable; the other noises don't seem to affect anything (they're just part of the visceral experience this car provides ).

 

I was out with the girls (in the family car) when I noticed the headlights on the car stopping alongside us. It was a G sedan with those OE Massive headlights. First time I've seen them in person, nighttime and all.

They looked pretty good.