6MT folks- Anyone experience this after spirited driving?

[Savethemanuals]

Did some spirited driving through mountain roads last weekend and since, my car developed a shudder/vibration upon takeoff from a standstill. If I exaggerate the throttle input a bit while coming off the clutch, its not as apparent but if you take off like normal, the car shudders/vibrates. Only happens when taking off from a standstill and not during gear changes while in motion. Wondering if I knocked something loose in the transmission mounts/driveshaft/center support bearing. Taking it into the dealer next week for further diagnosis but has anyone experienced something similar and what was the fix?

 

[hawk02]

Having owned two cars with Tremec 6060 transmissions, I’ve noticed that when the transmission gets hot—such as from spirited driving—it tends to exhibit some clutch chatter when taking off from a stop. I haven’t noticed it as much on my BW as I did on my 2017 Camaro ZL1. But in all fairness, the Camaro had about 6,000 more miles on it.

 

[piranha971]

^Yup. Same here

 

[Savethemanuals]

Interesting. Would it still do it once cooled down?

 

[hawk02]

Interesting. Would it still do it once cooled down?

No. There was no chatter when the transmission was cool. I experienced it the most on my ZL1 when the outside temps got above 90 degrees and I had driven the car for a while.

 

[Savethemanuals]

Got it. My issue is persistent, regardless of temps.

 

[BKC1]

The "chatter" is stick-slip, which is unavoidable. The chatter point moves up or down based on temperature, just like your brakes grab better when they're at operating temperature and worse when they're cold. If you're in that region, you're applying too little throttle in proportion to clutch position. The solution is to roll into the throttle much earlier (like 30-50% faster/harder), not slow down your clutch foot.

 

[Savethemanuals]

Thanks. Mine is more like a vibration/shudder that was not there prior and not a chatter noise as one would experience similar when you upgrade your flywheel to a lighter one.

 

[sonny200]

Even after 2 separate days at Virginia Inter'l Raceway, have not experienced what you're describing. Not at the track nor afterwards. (I currently have 45k miles on my MY23 5BW.)

The only thing I've experienced is some difficulty getting into1st & 2nd gears when cold but went away with double-clutching. Weirdly, this issue suddenly went away a couple of weeks ago.

 

[piranha971]

I have had years to think through this issue and towards the end of my ownership, it was often shuddering and vibrating on clutch release in first gear to a point that I could not take off smoothly. I did have to apply more throttle and earlier to try to eliviate it. It came and went seemingly randomly. Was fine for a few months then would start that behavior for a few weeks. I concluded that it was the throw out bearing.

 

[BKC1]

None of this is mechanical. It's all a driver issue. If you drive modded LS/LT/LF engines with a clutch with no dual mass flywheel and a solid floater you'll get much better at avoiding chatter. I hesitate to say "slip the clutch more" because most people reduce gas and try to accomplish everything with the clutch pedal. In reality, you need to tip in the throttle much sooner and ramp it up much faster. For training purposes, try to "ramp the gas through the clutch pedal" such that the engine revs have to come down as the clutch transitions to medium engagement.

 

[Super Saloon]

I’ve driven 5 different manual Blackwings (all CT4), two of them at Spring Mountain, and have not experienced what you are describing.

 

[rubberduck]

@Savethemanuals is your transmission temp getting excessively hot, like 200F+ or is it normal range 165F?

 

[Savethemanuals]

@Savethemanuals is your transmission temp getting excessively hot, like 200F+ or is it normal range 165F?

Normal range.

 

[Savethemanuals]

I have had years to think through this issue and towards the end of my ownership, it was often shuddering and vibrating on clutch release in first gear to a point that I could not take off smoothly. I did have to apply more throttle and earlier to try to alienate it. It came and went seemingly randomly. Was fine for a few months then would start that behavior for a few weeks. I concluded that it was the throw out bearing.

This sounds almost exactly what I’m experiencing but it’s there all the time. Did you end up replacing the throw out bearing and it fixed the issue?

 

[piranha971]

This sounds almost exactly what I’m experiencing but it’s there all the time. Did you end up replacing the throw out bearing and it fixed the issue?

I sold the car before getting that far into it.