Gears Grinding!!

Thomasz126 · 01-09-2008, 12:17 PM

Everytime I switch gears, it would grind. I thought that was because my clutch was going. Now that I installed a new clutch, it still grinds when I switch gears. Even when I press the clutch to the floor, there is still minimal grinding. What the hell could be the problem?? Or solution??? CDV delete??

Vince@ V K Motorwerks · 01-09-2008, 12:21 PM

isnt your car still under warrenty? If it is I would just take it back and let them see it.

silvrevo · 01-09-2008, 12:23 PM

you put a new clutch in already?
first I have heard.

sorry guy.

5soko · 01-09-2008, 12:29 PM

did u change the flywheel aswell.

Mr. 5 · 01-09-2008, 12:35 PM

Quote:

Originally Posted by Chitown335i

isnt your car still under warrenty? If it is I would just take it back and let them see it.

That's my question, but you can use my DIY to change the tranny fluid to Royal Purple Synchromax. The difference is noticable!

giddyup69 · 01-09-2008, 12:54 PM

sounds like your synchros are gone..

35past3 · 01-09-2008, 01:04 PM

Quote:

Originally Posted by Thomasz126

Everytime I switch gears, it would grind. I thought that was because my clutch was going. Now that I installed a new clutch, it still grinds when I switch gears. Even when I press the clutch to the floor, there is still minimal grinding. What the hell could be the problem?? Or solution??? CDV delete??

I have the same problem when going into second. It is most noticable in cold weather. Just waiting for another cold day for them to look at it. This happened on my e46 330 and they just replaced the tranny under CPO. Isn't it true this is the same tranny used by the M division?

Chowbow · 01-09-2008, 01:30 PM

Grinding is typically un-related to clutch wear. When you hear grinding it is the dogteeth in the transmission that are grinding together to mate. It's typically caused by bad syncros that won't spin the dogteeth correctly before going into the next gear. Time to rebuild the tranny and double clutch all day in the mean time.

CirrusSR22 · 01-09-2008, 01:36 PM

Or the clutch is not releasing all the way. Try bleeding the clutch. Simple and easy thing to rule out first.

Thomasz126 · 01-09-2008, 05:32 PM

thanks for the info guys. Its probably the synchros going bad.

CASHBY · 01-09-2008, 05:40 PM

There are only a few things that can cause "gear Clash"

One is going to be a clutch not disengaging.

another is the synchro which pushes on the clutch teeth and slows down the the gear so the sleeve can lock onto the clutch teeth to engage that gear.

also, I notice when trying to shift a bit faster when having the stock CDV i would get some 2nd and 3rd gear grinding...since i put the modded CDV in I have not had an issue... try that and see if it helps any.

CASHBY · 01-09-2008, 05:41 PM

Quote:

Originally Posted by CirrusSR22

Or the clutch is not releasing all the way. Try bleeding the clutch. Simple and easy thing to rule out first.

+1

01-09-2008, 12:17 PM	#1
Thomasz126 Private First Class 4 Rep 104 Posts Drives: 335i Join Date: Aug 2007 Location: Jersey iTrader: (0)	Gears Grinding!! Everytime I switch gears, it would grind. I thought that was because my clutch was going. Now that I installed a new clutch, it still grinds when I switch gears. Even when I press the clutch to the floor, there is still minimal grinding. What the hell could be the problem?? Or solution??? CDV delete??
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01-09-2008, 12:21 PM	#2
Vince@ V K Motorwerks Lieutenant Colonel 150 Rep 1,738 Posts Drives: 01 Black 911 Turbo, 09 X5 Join Date: May 2007 Location: Bloomingdale, IL iTrader: (0)	isnt your car still under warrenty? If it is I would just take it back and let them see it.
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01-09-2008, 12:23 PM	#3
silvrevo Captain 40 Rep 660 Posts Drives: M235v 6spd Join Date: Jul 2006 Location: Location: Location iTrader: (1)	you put a new clutch in already? first I have heard. sorry guy.
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01-09-2008, 12:29 PM	#4
5soko Brigadier General 350 Rep 4,633 Posts Drives: M5 Join Date: Aug 2007 Location: Brooklyn, NY iTrader: (4)	did u change the flywheel aswell.
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01-09-2008, 12:54 PM	#6
giddyup69 Private First Class 6 Rep 173 Posts Drives: '13 F30 335xi Join Date: Nov 2007 Location: Toronto, On, Canada iTrader: (1)	sounds like your synchros are gone..
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01-09-2008, 01:30 PM	#8
Chowbow pew pew 169 Rep 6,781 Posts Drives: 三三五i Join Date: Aug 2007 Location: CA iTrader: (6) Garage List 2015 BMW 328i wagon [0.00] 2007 BMW 335i sedan [10.00] 1997 BMW 328i track ... [10.00]	Grinding is typically un-related to clutch wear. When you hear grinding it is the dogteeth in the transmission that are grinding together to mate. It's typically caused by bad syncros that won't spin the dogteeth correctly before going into the next gear. Time to rebuild the tranny and double clutch all day in the mean time. __________________ CSL replicas are now CSL counterfeits. Jesus saves, like Valentine1.
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01-09-2008, 01:36 PM	#9
CirrusSR22 Major 347 Rep 1,326 Posts Drives: BMW Join Date: Apr 2005 Location: Minnesota iTrader: (0)	Or the clutch is not releasing all the way. Try bleeding the clutch. Simple and easy thing to rule out first.
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01-09-2008, 05:32 PM	#10
Thomasz126 Private First Class 4 Rep 104 Posts Drives: 335i Join Date: Aug 2007 Location: Jersey iTrader: (0)	thanks for the info guys. Its probably the synchros going bad.
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01-09-2008, 05:40 PM	#11
CASHBY 171 Rep 2,114 Posts Drives: E90 335 "done up" Join Date: Dec 2006 Location: GARAGE iTrader: (2)	There are only a few things that can cause "gear Clash" One is going to be a clutch not disengaging. another is the synchro which pushes on the clutch teeth and slows down the the gear so the sleeve can lock onto the clutch teeth to engage that gear. also, I notice when trying to shift a bit faster when having the stock CDV i would get some 2nd and 3rd gear grinding...since i put the modded CDV in I have not had an issue... try that and see if it helps any.
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