Horrible sound while decreasing speed in gear (no clutch) - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

humfrz · 08-20-2016, 08:32 PM

Quote:

Originally Posted by exE36M3

FWIW - a throwout bearing isn't going to make any noise when you are driving. It just floats there until you push the clutch in and engages the pressure plate. ............

Well now, @exE36M3 , I had that same misconception before ol @Ultramaroon educated me .......

Apparently, the FR-S has an "active" release bearing (TOB). It runs anytime the engine is running. However, it just "works" when the clutch is pushed in. A very slight pressure from the slave cylinder keeps it in contact with the fingers of the pressure plate at all times.

So, if is really bad, it can howl without the clutch being pushed in.

humfrz

Ultramaroon · 08-20-2016, 11:32 PM

For the record, I didn't assign a specific name to the system. I don't really know if it's called anything special. It's a run-of-the-mill, self-adjusting hydraulic clutch. And yes, the TOB is rotating 100% of the time. ...unless it's starting to seize. Then it screeches.

humfrz · 08-21-2016, 12:17 AM

Quote:

Originally Posted by Ultramaroon

For the record, I didn't assign a specific name to the system. I don't really know if it's called anything special. It's a run-of-the-mill, self-adjusting hydraulic clutch. And yes, the TOB is rotating 100% of the time. ...unless it's starting to seize. Then it screeches.

Well then, I think I will change my reference name of that kind of TOB form "active" to "constant-contact".

That's more descriptive ......

humfrz

Ultramaroon · 08-21-2016, 12:47 AM

Quote:

Originally Posted by humfrz

Well then, I think I will change my reference name of that kind of TOB form "active" to "constant-contact".

That's more descriptive ......

I think it's just a cable-versus-hydraulic thing, no? I'm with you. I just wonder if there are any functional variants.

humfrz · 08-21-2016, 02:26 AM

Quote:

Originally Posted by Ultramaroon

I think it's just a cable-versus-hydraulic thing, no? I'm with you. I just wonder if there are any functional variants.

Yep, best I can figure is that most all hydraulic clutches have constant contact TOBs.

humfrz

exE36M3 · 08-21-2016, 11:26 AM

Yes, i did some more reading on that topic gentlemen. You learning something new everyday!

humfrz · 08-21-2016, 01:45 PM

Quote:

Originally Posted by exE36M3

Yes, i did some more reading on that topic gentlemen. You learning something new everyday!

Yep, we stick together ...... and we can all learn ......

......except fer ol @Tcoat ....... and he thinks he knows it all .......

humfrz

Tcoat · 08-21-2016, 02:50 PM

Quote:

Originally Posted by humfrz

Yep, we stick together ...... and we can all learn ......

......except fer ol @Tcoat ....... and he thinks he knows it all .......

humfrz

Nope. But I do know what I don't know and that helps.

humfrz · 08-21-2016, 03:06 PM

Quote:

Originally Posted by Tcoat

Nope. But I do know what I don't know and that helps.

hmmmm.........how does one know what they don't know"..... if they don't know, if what they don't know, even exists .......

Next we shall discuss the tree falling in the forest .........

Meanwhile, if I can get mrs humfrz showered up and dressed, we are going to take a ride up into the hills of the coal country. Yep, back in the day, they mined coal not to far from here ......

humfrz

Ultramaroon · 08-21-2016, 04:34 PM

Ultramaroon · 08-21-2016, 04:53 PM

Fuck off, Rummy.

08-20-2016, 11:32 PM	#30
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,394 Thanks: 53,054 Thanked 37,230 Times in 19,309 Posts Mentioned: 1118 Post(s)	For the record, I didn't assign a specific name to the system. I don't really know if it's called anything special. It's a run-of-the-mill, self-adjusting hydraulic clutch. And yes, the TOB is rotating 100% of the time. ...unless it's starting to seize. Then it screeches. __________________ service manuals

08-21-2016, 04:34 PM	#38
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,394 Thanks: 53,054 Thanked 37,230 Times in 19,309 Posts Mentioned: 1118 Post(s)	__________________ service manuals

08-21-2016, 04:53 PM	#39
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,394 Thanks: 53,054 Thanked 37,230 Times in 19,309 Posts Mentioned: 1118 Post(s)	Fuck off, Rummy. __________________ service manuals

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Horrible bucking and shutter after clutch install	Scikotic	Engine, Exhaust, Transmission	32	07-12-2016 08:10 PM
Runduce 6-Speed Transmission Gear - 500hp	botbs	Engine, Exhaust, Transmission	10	11-22-2015 02:59 PM
is it ok to slip my clutch often in 2nd gear when my rpm is below 2k?	awhatzable	Scion FR-S / Toyota 86 GT86 General Forum	88	06-17-2015 06:12 PM
What's this clunk sound coming from 2nd gear after letting go of the clutch ?	awhatzable	Scion FR-S / Toyota 86 GT86 General Forum	17	04-30-2015 02:14 AM
Cold morning and horrible grinding/screeching sound	Books	Issues \| Warranty \| Recalls / TSB	1	11-14-2012 02:18 PM

08-21-2016, 11:26 AM	#34
exE36M3 Senior Member Join Date: Mar 2014 Drives: 2013 BRZ Location: NorCal Posts: 331 Thanks: 165 Thanked 173 Times in 93 Posts Mentioned: 4 Post(s)	Yes, i did some more reading on that topic gentlemen. You learning something new everyday!

User Name		Remember Me?
Password