1st gear crunch twisting sound - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Ultramaroon · 02-20-2017, 12:04 AM

Yes.

BboyRuda · 02-20-2017, 12:36 AM

Quote:

Originally Posted by Drambeenie

Hey guys so I've been driving the car more and haven't had any issues with the gears stall or strange sounds. Do you think I should still take it to the dealership to be diagnosed?

Better to be safe than sorry bro.

C4RBON · 02-20-2017, 12:44 AM

Definitely. I'd inspect your transmission oil, diff oil, and clutch for surprises.

Ultramaroon · 02-20-2017, 12:49 AM

Quote:

Originally Posted by Drambeenie

Hey guys so I've been driving the car more and haven't had any issues with the gears stall or strange sounds. Do you think I should still take it to the dealership to be diagnosed?

I should explain a little more. It sounds like two gears were engaged at once. This causes the transmission to completely lock up. The only way that can happen is if some part of the gear selection mechanism is either loose, misaligned, or broken.

It's unlikely but possible for the transmission to lock up while in motion. That would be a very bad day.

guybo · 02-20-2017, 07:53 AM

There's the problem. You granny shifted when you should have double clutched.

It smells to me like 1st gear broke and is missing some teeth. The metal bits ar floating around in the tranny and will do more damage the more you drive the car. I don't think that'll matter much because I think they'll replace rather than rebuild.

I feel bad for you- brand new car and you expect it to be trouble-free and then this happens. But brand new cars can do this. Sometimes you just get a dud off the assembly line. That said, get it fixed under warranty and forget about it, it's just a flukey thing and the car will be fine after.

Drambeenie · 02-20-2017, 09:48 AM

Quote:

Originally Posted by ToySub1946

Are you aware that your car has 'hill start assist' ?

Others have stated the default setting, when car is new, it is set to OFF.

I'm aware that this exists but didn't activate it. I've never had hill start issues before. There is def something going on inside the tranny.

wheelhaus · 02-20-2017, 10:46 AM

Quote:

Originally Posted by Ultramaroon

I should explain a little more. It sounds like two gears were engaged at once. This causes the transmission to completely lock up. The only way that can happen is if some part of the gear selection mechanism is either loose, misaligned, or broken.

It's unlikely but possible for the transmission to lock up while in motion. That would be a very bad day.

This would also explain the feeling of first gear "missing" and allowing the car rolling backwards. The "crunching" noise could have been the synchros skipping from non-engagement, and then the sudden engine stall caused by instantaneous synchro engagement.

Ultramaroon · 02-20-2017, 01:55 PM

Quote:

Originally Posted by wheelhaus

This would also explain the feeling of first gear "missing" and allowing the car rolling backwards. The "crunching" noise could have been the synchros skipping from non-engagement, and then the sudden engine stall caused by instantaneous synchro engagement.

Agreed. I don't think any gears actually failed because OP states he can drive the car normally now.

Still, unaddressed, this will happen again and be at best inconvenient, life threatening at worst.

/dramatic warning

Drambeenie · 02-20-2017, 02:21 PM

And there she goes... thanks for the replies guys! I'll keep the thread updated as I learn more. Curious to see what'll be found in the transmission pan.

Ultramaroon · 02-20-2017, 02:31 PM

Awww, poor baby. She'll be all better soon.

BboyRuda · 02-20-2017, 07:42 PM

Quote:

Originally Posted by guybo

There's the problem. You granny shifted when you should have double clutched.

Double clutching is necessary in our cars? o.O

Ultramaroon · 02-20-2017, 08:06 PM

Quote:

Originally Posted by BboyRuda

Double clutching is necessary in our cars? o.O

No but it actually helps, especially for second and first gear downshifts.

[ame="https://www.youtube.com/watch?v=pB-bN-RkJLM#t=47"]The Fast and the Furious (2/10) Movie CLIP - Winning's Winning (2001) HD - YouTube[/ame]

guybo · 02-20-2017, 08:25 PM

Quote:

Originally Posted by BboyRuda

Double clutching is necessary in our cars? o.O

BboyRuda · 02-20-2017, 08:37 PM

Quote:

Originally Posted by Ultramaroon

No but it actually helps, especially for second and first gear downshifts.

How does it help? Why not just rev match (without double clutching) like the rest of the gears?

02-20-2017, 12:04 AM	#15
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,865 Thanks: 52,120 Thanked 36,513 Times in 18,917 Posts Mentioned: 1106 Post(s) Tagged: 9 Thread(s)	Yes. __________________ service manuals

02-20-2017, 02:31 PM	#24
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,865 Thanks: 52,120 Thanked 36,513 Times in 18,917 Posts Mentioned: 1106 Post(s) Tagged: 9 Thread(s)	Awww, poor baby. She'll be all better soon. __________________ service manuals

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Show us your Custom Roll Cage or Roll Bar and Harness Setup	Black Tire	Tracking / Autocross / HPDE / Drifting	27	02-13-2015 09:59 PM
Crunch noise?	winsometang	Issues \| Warranty \| Recalls / TSB	9	12-02-2014 01:38 PM
6th to 5th Downshift Crunch	jcat5150	Issues \| Warranty \| Recalls / TSB	1	04-17-2014 03:41 PM
Second Gear Crunch?	NOHOME	Scion FR-S / Toyota 86 GT86 General Forum	18	09-27-2012 02:52 PM
5th Gear and 6th Gear 0% throttle to 80% throttle gear crunch?	kharn83	Issues \| Warranty \| Recalls / TSB	9	08-06-2012 07:44 PM

02-20-2017, 12:44 AM	#17
C4RBON Senior Member Join Date: Mar 2011 Drives: '15 BRZ, '19 GTI Location: USA/Iowa Posts: 204 Thanks: 77 Thanked 163 Times in 79 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Definitely. I'd inspect your transmission oil, diff oil, and clutch for surprises.

02-20-2017, 07:53 AM	#19
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	There's the problem. You granny shifted when you should have double clutched. It smells to me like 1st gear broke and is missing some teeth. The metal bits ar floating around in the tranny and will do more damage the more you drive the car. I don't think that'll matter much because I think they'll replace rather than rebuild. I feel bad for you- brand new car and you expect it to be trouble-free and then this happens. But brand new cars can do this. Sometimes you just get a dud off the assembly line. That said, get it fixed under warranty and forget about it, it's just a flukey thing and the car will be fine after.

02-20-2017, 02:21 PM	#23
Drambeenie Senior Member Join Date: Oct 2016 Drives: Black 17 BRZ LT MT PP Location: NYC Posts: 470 Thanks: 499 Thanked 518 Times in 202 Posts Mentioned: 30 Post(s) Tagged: 0 Thread(s)	And there she goes... thanks for the replies guys! I'll keep the thread updated as I learn more. Curious to see what'll be found in the transmission pan.

User Name		Remember Me?
Password